Transmission oil cooling
 

On Sunday, May 25, 2014 3:04:31 PM UTC-4, Mr. Luddite wrote:
On 5/25/2014 8:25 AM, Poquito Loco wrote:

On Sat, 24 May 2014 18:13:59 -0400, "Mr. Luddite" wrote:



On 5/24/2014 4:03 PM, Poquito Loco wrote:

I'm thinking of putting one of these on the Silverado. Anyone had any experience with the concept of

increasing the oil supply to keep it cooler?



http://www.ebay.com/itm/PPE-Allison-Deep-Tranmission-Pan-Duramax-Allison-1000-2000-2400-Series-128051000/121345886743?_trksid=p2047675.c100011.m1850&_trkpa rms=aid%3D222008%26algo%3DSIC.MOTORS%26ao%3D1%26as c%3D22855%26meid%3D7132067336503725629%26pid%3D100 011%26prg%3D9833%26rk%3D1%26rkt%3D10%26sd%3D121335 643997







Followup to my last ...



I assume your Silverado has a transmission fluid temp gauge as well as

an engine temp gauge. My Ford F-250 Super Duty does, I know. If I were

noticing higher than normal transmission temps while towing I'd be more

inclined to add an axillary transmission fluid cooler rather than just

increase the capacity of the transmission pan.



If I am not mistaken your truck has the Allison transmission. From what

I've heard, it is a superb transmission for towing ... probably the best

thing GM has going for it in their trucks. Unless it's getting hotter

than normal, I'd leave it alone. Just my humble opinion.





Here's an interesting and informative piece about Allison transmissions.. I'll probably just leave

mine alone for a while. I've never seen the temp get much over 200.



http://dmaxstore.com/index.php?main_page=product_info&cPath=16_363&prod ucts_id=668&zenid=2euu9fpbqf4tmumt6ecj7kbu74







The Pace Arrow Class A motorhome we had for a while had an Allison

transmission. It was the only thing I liked about the whole rig.



Ford sorta copied some of the operating characteristics of the Allison

in the "TorqueShift" transmission used in the Super Duty Series. It

operates similarly to the Allison, including different gear ratios on

the downshifts than the upshifts.



One thing common to both that I assume you do ... always use the

"Tow/Haul" mode when towing. Otherwise, it *may* get hotter than normal.

I'm having a little trouble with "different gear ratios" going down verses going up. There's only one collection of planetary gear sets in an automatic. The ratios don't change.

Transmission oil cooling
 

On Monday, May 26, 2014 9:54:37 AM UTC-4, John H. wrote:
On Mon, 26 May 2014 03:54:34 -0400, "Mr. Luddite" wrote:



On 5/25/2014 8:14 PM, Poquito Loco wrote:

On Sun, 25 May 2014 18:50:26 -0400, "Mr. Luddite" wrote:



On 5/25/2014 6:08 PM, Poquito Loco wrote:

On Sun, 25 May 2014 17:36:22 -0400, "Mr. Luddite" wrote:



On 5/25/2014 3:17 PM, Poquito Loco wrote:

On Sun, 25 May 2014 15:04:31 -0400, "Mr. Luddite" wrote:



On 5/25/2014 8:25 AM, Poquito Loco wrote:

On Sat, 24 May 2014 18:13:59 -0400, "Mr. Luddite" wrote:



On 5/24/2014 4:03 PM, Poquito Loco wrote:

I'm thinking of putting one of these on the Silverado. Anyone had any experience with the concept of

increasing the oil supply to keep it cooler?



http://www.ebay.com/itm/PPE-Allison-Deep-Tranmission-Pan-Duramax-Allison-1000-2000-2400-Series-128051000/121345886743?_trksid=p2047675..c100011.m1850&_trkp arms=aid%3D222008%26algo%3DSIC.MOTORS%26ao%3D1%26a sc%3D22855%26meid%3D7132067336503725629%26pid%3D10 0011%26prg%3D9833%26rk%3D1%26rkt%3D10%26sd%3D12133 5643997







Followup to my last ...



I assume your Silverado has a transmission fluid temp gauge as well as

an engine temp gauge. My Ford F-250 Super Duty does, I know. If I were

noticing higher than normal transmission temps while towing I'd be more

inclined to add an axillary transmission fluid cooler rather than just

increase the capacity of the transmission pan.



If I am not mistaken your truck has the Allison transmission. From what

I've heard, it is a superb transmission for towing ... probably the best

thing GM has going for it in their trucks. Unless it's getting hotter

than normal, I'd leave it alone. Just my humble opinion.





Here's an interesting and informative piece about Allison transmissions. I'll probably just leave

mine alone for a while. I've never seen the temp get much over 200.

Transmission oil cooling
 

On 5/27/2014 2:23 PM, wrote:
On Monday, May 26, 2014 9:54:37 AM UTC-4, John H. wrote:
On Mon, 26 May 2014 03:54:34 -0400, "Mr. Luddite" wrote:



On 5/25/2014 8:14 PM, Poquito Loco wrote:

On Sun, 25 May 2014 18:50:26 -0400, "Mr. Luddite" wrote:



On 5/25/2014 6:08 PM, Poquito Loco wrote:

On Sun, 25 May 2014 17:36:22 -0400, "Mr. Luddite" wrote:



On 5/25/2014 3:17 PM, Poquito Loco wrote:

On Sun, 25 May 2014 15:04:31 -0400, "Mr. Luddite" wrote:



On 5/25/2014 8:25 AM, Poquito Loco wrote:

On Sat, 24 May 2014 18:13:59 -0400, "Mr. Luddite" wrote:



On 5/24/2014 4:03 PM, Poquito Loco wrote:

I'm thinking of putting one of these on the Silverado. Anyone had any experience with the concept of

increasing the oil supply to keep it cooler?



http://www.ebay.com/itm/PPE-Allison-Deep-Tranmission-Pan-Duramax-Allison-1000-2000-2400-Series-128051000/121345886743?_trksid=p2047675.c100011.m1850&_trkpa rms=aid%3D222008%26algo%3DSIC.MOTORS%26ao%3D1%26as c%3D22855%26meid%3D7132067336503725629%26pid%3D100 011%26prg%3D9833%26rk%3D1%26rkt%3D10%26sd%3D121335 643997







Followup to my last ...



I assume your Silverado has a transmission fluid temp gauge as well as

an engine temp gauge. My Ford F-250 Super Duty does, I know. If I were

noticing higher than normal transmission temps while towing I'd be more

inclined to add an axillary transmission fluid cooler rather than just

increase the capacity of the transmission pan.



If I am not mistaken your truck has the Allison transmission. From what

I've heard, it is a superb transmission for towing ... probably the best

thing GM has going for it in their trucks. Unless it's getting hotter

than normal, I'd leave it alone. Just my humble opinion.





Here's an interesting and informative piece about Allison transmissions. I'll probably just leave

mine alone for a while. I've never seen the temp get much over 200.



http://dmaxstore.com/index.php?main_page=product_info&cPath=16_363&prod ucts_id=668&zenid=2euu9fpbqf4tmumt6ecj7kbu74







The Pace Arrow Class A motorhome we had for a while had an Allison

transmission. It was the only thing I liked about the whole rig.



Ford sorta copied some of the operating characteristics of the Allison

in the "TorqueShift" transmission used in the Super Duty Series. It

operates similarly to the Allison, including different gear ratios on

the downshifts than the upshifts.



One thing common to both that I assume you do ... always use the

"Tow/Haul" mode when towing. Otherwise, it *may* get hotter than normal.





That is on my checklist. This sits on my dash:



DEPARTURE



" TOW/HAUL MODE

" JACKS 'OFF'

" HITCH FORWARD

" HITCH LOCKED

" TRAILER BRAKE

" REGRIGERATOR GAS

" TAIL LIGHTS

" WALK AROUND

" GET WIFE



Except for the last, I've forgotten all of them at least once!







It has been awhile but I remember always doing another hitch check on

the 5th wheel we had. Manually engage the trailer brakes only and,

while holding them on, try to pull way with the truck. If the hitch

isn't engaged and locked properly, you'll find out in a hurry. This is

done before fully retracting the landing gear.





If mine isn't fully engaged I can't lock it. But, thanks for the tip.





ummmmm... Just because your lever indicates it is in the "locked"

position doesn't guarantee 100% that it *is* locked. Not trying to

nit-pic but the place that sold you the 5th wheel should have gone over

the test I described during your inspection and pickup. It's a pretty

standard test that ensures the pin is securely positioned and locked in

the hitch.



Kinda embarrassing (and potentially costly) to retract the landing gear,

put the truck in drive thinking everything is locked only to have the

pin crash through the bed of your truck or worse.





I'm talking about the locking pin. Unless the latch is closed, the locking pin won't go into it's

hole. Oh, and I've also go a 'bed protector' in case I get really stupid! It catches the pin if it's

not latched properly. On my hitch, it's pretty easy to see if the jaw is closed.



No, no one suggested holding the trailer brake and trying to pull forward. If the jaw wasn't closed,

sounds like a good way to do some damage.





Look up "tug test".



I did, and I understand what you're saying.



I've just not heard it before - even from all the other 5th wheel guys we hang with. I use the

trailer break to put the hitch back and forth for maneuvering, but have never used it to check

whether the pin is locked. I get a decent jolt when I back into the pin, and it's easy to see if the

pin is in all the way or not. Lastly, I put the locking pin in. If it goes, then the latch is

closed. It works well.

Back when I messed around with trucks it was pretty common to check with the trailer brakes on. You just tug a little to see what happens. Better to find out in the yard than on the road. But that was 18 wheelers, not rvs.



When my son and I picked up our fifth wheels (we did so on the same
day) both of us were instructed on doing the "tug" test. It certainly
doesn't hurt anything and ensures that the hitch is engaged and locked.
We both had Reese hitches that were installed in our trucks by the
same company that sold the fifth wheel RV's.

Transmission oil cooling
 

On 5/27/2014 2:19 PM, wrote:
On Sunday, May 25, 2014 3:04:31 PM UTC-4, Mr. Luddite wrote:
On 5/25/2014 8:25 AM, Poquito Loco wrote:

On Sat, 24 May 2014 18:13:59 -0400, "Mr. Luddite" wrote:



On 5/24/2014 4:03 PM, Poquito Loco wrote:

I'm thinking of putting one of these on the Silverado. Anyone had any experience with the concept of

increasing the oil supply to keep it cooler?



http://www.ebay.com/itm/PPE-Allison-Deep-Tranmission-Pan-Duramax-Allison-1000-2000-2400-Series-128051000/121345886743?_trksid=p2047675.c100011.m1850&_trkpa rms=aid%3D222008%26algo%3DSIC.MOTORS%26ao%3D1%26as c%3D22855%26meid%3D7132067336503725629%26pid%3D100 011%26prg%3D9833%26rk%3D1%26rkt%3D10%26sd%3D121335 643997







Followup to my last ...



I assume your Silverado has a transmission fluid temp gauge as well as

an engine temp gauge. My Ford F-250 Super Duty does, I know. If I were

noticing higher than normal transmission temps while towing I'd be more

inclined to add an axillary transmission fluid cooler rather than just

increase the capacity of the transmission pan.



If I am not mistaken your truck has the Allison transmission. From what

I've heard, it is a superb transmission for towing ... probably the best

thing GM has going for it in their trucks. Unless it's getting hotter

than normal, I'd leave it alone. Just my humble opinion.





Here's an interesting and informative piece about Allison transmissions. I'll probably just leave

mine alone for a while. I've never seen the temp get much over 200.



http://dmaxstore.com/index.php?main_page=product_info&cPath=16_363&prod ucts_id=668&zenid=2euu9fpbqf4tmumt6ecj7kbu74







The Pace Arrow Class A motorhome we had for a while had an Allison

transmission. It was the only thing I liked about the whole rig.



Ford sorta copied some of the operating characteristics of the Allison

in the "TorqueShift" transmission used in the Super Duty Series. It

operates similarly to the Allison, including different gear ratios on

the downshifts than the upshifts.



One thing common to both that I assume you do ... always use the

"Tow/Haul" mode when towing. Otherwise, it *may* get hotter than normal.

I'm having a little trouble with "different gear ratios" going down verses going up. There's only one collection of planetary gear sets in an automatic. The ratios don't change.



I think I screwed that up. It's not different gear ratios, but rather
different shift pressures (when using the tow/haul mode). For example,
like the Allison, the Ford Torqshift will sense when going downhill and
automatically downshift to apply engine braking on gas engines, saving
wear on the brakes. Doesn't apply to diesels, since a diesel has no
engine braking.

Transmission oil cooling
 

On Tue, 27 May 2014 14:45:09 -0400, "Mr. Luddite" wrote:

On 5/27/2014 2:19 PM, wrote:
On Sunday, May 25, 2014 3:04:31 PM UTC-4, Mr. Luddite wrote:
On 5/25/2014 8:25 AM, Poquito Loco wrote:

On Sat, 24 May 2014 18:13:59 -0400, "Mr. Luddite" wrote:



On 5/24/2014 4:03 PM, Poquito Loco wrote:

I'm thinking of putting one of these on the Silverado. Anyone had any experience with the concept of

increasing the oil supply to keep it cooler?



http://www.ebay.com/itm/PPE-Allison-Deep-Tranmission-Pan-Duramax-Allison-1000-2000-2400-Series-128051000/121345886743?_trksid=p2047675.c100011.m1850&_trkpa rms=aid%3D222008%26algo%3DSIC.MOTORS%26ao%3D1%26as c%3D22855%26meid%3D7132067336503725629%26pid%3D100 011%26prg%3D9833%26rk%3D1%26rkt%3D10%26sd%3D121335 643997







Followup to my last ...



I assume your Silverado has a transmission fluid temp gauge as well as

an engine temp gauge. My Ford F-250 Super Duty does, I know. If I were

noticing higher than normal transmission temps while towing I'd be more

inclined to add an axillary transmission fluid cooler rather than just

increase the capacity of the transmission pan.



If I am not mistaken your truck has the Allison transmission. From what

I've heard, it is a superb transmission for towing ... probably the best

thing GM has going for it in their trucks. Unless it's getting hotter

than normal, I'd leave it alone. Just my humble opinion.





Here's an interesting and informative piece about Allison transmissions. I'll probably just leave

mine alone for a while. I've never seen the temp get much over 200.



http://dmaxstore.com/index.php?main_page=product_info&cPath=16_363&prod ucts_id=668&zenid=2euu9fpbqf4tmumt6ecj7kbu74







The Pace Arrow Class A motorhome we had for a while had an Allison

transmission. It was the only thing I liked about the whole rig.



Ford sorta copied some of the operating characteristics of the Allison

in the "TorqueShift" transmission used in the Super Duty Series. It

operates similarly to the Allison, including different gear ratios on

the downshifts than the upshifts.



One thing common to both that I assume you do ... always use the

"Tow/Haul" mode when towing. Otherwise, it *may* get hotter than normal.

I'm having a little trouble with "different gear ratios" going down verses going up. There's only one collection of planetary gear sets in an automatic. The ratios don't change.



I think I screwed that up. It's not different gear ratios, but rather
different shift pressures (when using the tow/haul mode). For example,
like the Allison, the Ford Torqshift will sense when going downhill and
automatically downshift to apply engine braking on gas engines, saving
wear on the brakes. Doesn't apply to diesels, since a diesel has no
engine braking.


If I set the cruise control to 45 mph (for example) and am in tow/haul mode, the transmission will
downshift using the engine to keep the speed there. If the cruise control is not set, but I'm in
tow/haul mode, the transmission will sense my slowing down, with or without the brake, and downshift
- if, for example, I'm approaching a red light.

Transmission oil cooling
 

On Tue, 27 May 2014 14:30:21 -0400, "Mr. Luddite" wrote:

On 5/27/2014 2:23 PM, wrote:
On Monday, May 26, 2014 9:54:37 AM UTC-4, John H. wrote:
On Mon, 26 May 2014 03:54:34 -0400, "Mr. Luddite" wrote:



On 5/25/2014 8:14 PM, Poquito Loco wrote:

On Sun, 25 May 2014 18:50:26 -0400, "Mr. Luddite" wrote:



On 5/25/2014 6:08 PM, Poquito Loco wrote:

On Sun, 25 May 2014 17:36:22 -0400, "Mr. Luddite" wrote:



On 5/25/2014 3:17 PM, Poquito Loco wrote:

On Sun, 25 May 2014 15:04:31 -0400, "Mr. Luddite" wrote:



On 5/25/2014 8:25 AM, Poquito Loco wrote:

On Sat, 24 May 2014 18:13:59 -0400, "Mr. Luddite" wrote:



On 5/24/2014 4:03 PM, Poquito Loco wrote:

I'm thinking of putting one of these on the Silverado. Anyone had any experience with the concept of

increasing the oil supply to keep it cooler?



http://www.ebay.com/itm/PPE-Allison-Deep-Tranmission-Pan-Duramax-Allison-1000-2000-2400-Series-128051000/121345886743?_trksid=p2047675.c100011.m1850&_trkpa rms=aid%3D222008%26algo%3DSIC.MOTORS%26ao%3D1%26as c%3D22855%26meid%3D7132067336503725629%26pid%3D100 011%26prg%3D9833%26rk%3D1%26rkt%3D10%26sd%3D121335 643997







Followup to my last ...



I assume your Silverado has a transmission fluid temp gauge as well as

an engine temp gauge. My Ford F-250 Super Duty does, I know. If I were

noticing higher than normal transmission temps while towing I'd be more

inclined to add an axillary transmission fluid cooler rather than just

increase the capacity of the transmission pan.



If I am not mistaken your truck has the Allison transmission. From what

I've heard, it is a superb transmission for towing ... probably the best

thing GM has going for it in their trucks. Unless it's getting hotter

than normal, I'd leave it alone. Just my humble opinion.





Here's an interesting and informative piece about Allison transmissions. I'll probably just leave

mine alone for a while. I've never seen the temp get much over 200.



http://dmaxstore.com/index.php?main_page=product_info&cPath=16_363&prod ucts_id=668&zenid=2euu9fpbqf4tmumt6ecj7kbu74







The Pace Arrow Class A motorhome we had for a while had an Allison

transmission. It was the only thing I liked about the whole rig.



Ford sorta copied some of the operating characteristics of the Allison

in the "TorqueShift" transmission used in the Super Duty Series. It

operates similarly to the Allison, including different gear ratios on

the downshifts than the upshifts.



One thing common to both that I assume you do ... always use the

"Tow/Haul" mode when towing. Otherwise, it *may* get hotter than normal.





That is on my checklist. This sits on my dash:



DEPARTURE



" TOW/HAUL MODE

" JACKS 'OFF'

" HITCH FORWARD

" HITCH LOCKED

" TRAILER BRAKE

" REGRIGERATOR GAS

" TAIL LIGHTS

" WALK AROUND

" GET WIFE



Except for the last, I've forgotten all of them at least once!







It has been awhile but I remember always doing another hitch check on

the 5th wheel we had. Manually engage the trailer brakes only and,

while holding them on, try to pull way with the truck. If the hitch

isn't engaged and locked properly, you'll find out in a hurry. This is

done before fully retracting the landing gear.





If mine isn't fully engaged I can't lock it. But, thanks for the tip.





ummmmm... Just because your lever indicates it is in the "locked"

position doesn't guarantee 100% that it *is* locked. Not trying to

nit-pic but the place that sold you the 5th wheel should have gone over

the test I described during your inspection and pickup. It's a pretty

standard test that ensures the pin is securely positioned and locked in

the hitch.



Kinda embarrassing (and potentially costly) to retract the landing gear,

put the truck in drive thinking everything is locked only to have the

pin crash through the bed of your truck or worse.





I'm talking about the locking pin. Unless the latch is closed, the locking pin won't go into it's

hole. Oh, and I've also go a 'bed protector' in case I get really stupid! It catches the pin if it's

not latched properly. On my hitch, it's pretty easy to see if the jaw is closed.



No, no one suggested holding the trailer brake and trying to pull forward. If the jaw wasn't closed,

sounds like a good way to do some damage.





Look up "tug test".



I did, and I understand what you're saying.



I've just not heard it before - even from all the other 5th wheel guys we hang with. I use the

trailer break to put the hitch back and forth for maneuvering, but have never used it to check

whether the pin is locked. I get a decent jolt when I back into the pin, and it's easy to see if the

pin is in all the way or not. Lastly, I put the locking pin in. If it goes, then the latch is

closed. It works well.

Back when I messed around with trucks it was pretty common to check with the trailer brakes on. You just tug a little to see what happens. Better to find out in the yard than on the road. But that was 18 wheelers, not rvs.



When my son and I picked up our fifth wheels (we did so on the same
day) both of us were instructed on doing the "tug" test. It certainly
doesn't hurt anything and ensures that the hitch is engaged and locked.
We both had Reese hitches that were installed in our trucks by the
same company that sold the fifth wheel RV's.


I may add it to my departure 'repertoire' and see how it goes. It would also provide a test of the
trailer braking.

Transmission oil cooling
 

On 5/27/2014 2:56 PM, Poquito Loco wrote:
On Tue, 27 May 2014 14:45:09 -0400, "Mr. Luddite" wrote:

On 5/27/2014 2:19 PM, wrote:
On Sunday, May 25, 2014 3:04:31 PM UTC-4, Mr. Luddite wrote:
On 5/25/2014 8:25 AM, Poquito Loco wrote:

On Sat, 24 May 2014 18:13:59 -0400, "Mr. Luddite" wrote:



On 5/24/2014 4:03 PM, Poquito Loco wrote:

I'm thinking of putting one of these on the Silverado. Anyone had any experience with the concept of

increasing the oil supply to keep it cooler?



http://www.ebay.com/itm/PPE-Allison-Deep-Tranmission-Pan-Duramax-Allison-1000-2000-2400-Series-128051000/121345886743?_trksid=p2047675.c100011.m1850&_trkpa rms=aid%3D222008%26algo%3DSIC.MOTORS%26ao%3D1%26as c%3D22855%26meid%3D7132067336503725629%26pid%3D100 011%26prg%3D9833%26rk%3D1%26rkt%3D10%26sd%3D121335 643997







Followup to my last ...



I assume your Silverado has a transmission fluid temp gauge as well as

an engine temp gauge. My Ford F-250 Super Duty does, I know. If I were

noticing higher than normal transmission temps while towing I'd be more

inclined to add an axillary transmission fluid cooler rather than just

increase the capacity of the transmission pan.



If I am not mistaken your truck has the Allison transmission. From what

I've heard, it is a superb transmission for towing ... probably the best

thing GM has going for it in their trucks. Unless it's getting hotter

than normal, I'd leave it alone. Just my humble opinion.





Here's an interesting and informative piece about Allison transmissions. I'll probably just leave

mine alone for a while. I've never seen the temp get much over 200.



http://dmaxstore.com/index.php?main_page=product_info&cPath=16_363&prod ucts_id=668&zenid=2euu9fpbqf4tmumt6ecj7kbu74







The Pace Arrow Class A motorhome we had for a while had an Allison

transmission. It was the only thing I liked about the whole rig.



Ford sorta copied some of the operating characteristics of the Allison

in the "TorqueShift" transmission used in the Super Duty Series. It

operates similarly to the Allison, including different gear ratios on

the downshifts than the upshifts.



One thing common to both that I assume you do ... always use the

"Tow/Haul" mode when towing. Otherwise, it *may* get hotter than normal.

I'm having a little trouble with "different gear ratios" going down verses going up. There's only one collection of planetary gear sets in an automatic. The ratios don't change.



I think I screwed that up. It's not different gear ratios, but rather
different shift pressures (when using the tow/haul mode). For example,
like the Allison, the Ford Torqshift will sense when going downhill and
automatically downshift to apply engine braking on gas engines, saving
wear on the brakes. Doesn't apply to diesels, since a diesel has no
engine braking.


If I set the cruise control to 45 mph (for example) and am in tow/haul mode, the transmission will
downshift using the engine to keep the speed there. If the cruise control is not set, but I'm in
tow/haul mode, the transmission will sense my slowing down, with or without the brake, and downshift
- if, for example, I'm approaching a red light.



The Ford Torqshift does the same in Tow/Haul. Only difference is that
with your rig being a diesel you don't get any engine braking when
going down hills like you will with a gas engine.

Transmission oil cooling
 

On Tue, 27 May 2014 15:08:46 -0400, "Mr. Luddite" wrote:

On 5/27/2014 2:56 PM, Poquito Loco wrote:
On Tue, 27 May 2014 14:45:09 -0400, "Mr. Luddite" wrote:

On 5/27/2014 2:19 PM, wrote:
On Sunday, May 25, 2014 3:04:31 PM UTC-4, Mr. Luddite wrote:
On 5/25/2014 8:25 AM, Poquito Loco wrote:

On Sat, 24 May 2014 18:13:59 -0400, "Mr. Luddite" wrote:



On 5/24/2014 4:03 PM, Poquito Loco wrote:

I'm thinking of putting one of these on the Silverado. Anyone had any experience with the concept of

increasing the oil supply to keep it cooler?



http://www.ebay.com/itm/PPE-Allison-Deep-Tranmission-Pan-Duramax-Allison-1000-2000-2400-Series-128051000/121345886743?_trksid=p2047675.c100011.m1850&_trkpa rms=aid%3D222008%26algo%3DSIC.MOTORS%26ao%3D1%26as c%3D22855%26meid%3D7132067336503725629%26pid%3D100 011%26prg%3D9833%26rk%3D1%26rkt%3D10%26sd%3D121335 643997







Followup to my last ...



I assume your Silverado has a transmission fluid temp gauge as well as

an engine temp gauge. My Ford F-250 Super Duty does, I know. If I were

noticing higher than normal transmission temps while towing I'd be more

inclined to add an axillary transmission fluid cooler rather than just

increase the capacity of the transmission pan.



If I am not mistaken your truck has the Allison transmission. From what

I've heard, it is a superb transmission for towing ... probably the best

thing GM has going for it in their trucks. Unless it's getting hotter

than normal, I'd leave it alone. Just my humble opinion.





Here's an interesting and informative piece about Allison transmissions. I'll probably just leave

mine alone for a while. I've never seen the temp get much over 200.



http://dmaxstore.com/index.php?main_page=product_info&cPath=16_363&prod ucts_id=668&zenid=2euu9fpbqf4tmumt6ecj7kbu74







The Pace Arrow Class A motorhome we had for a while had an Allison

transmission. It was the only thing I liked about the whole rig.



Ford sorta copied some of the operating characteristics of the Allison

in the "TorqueShift" transmission used in the Super Duty Series. It

operates similarly to the Allison, including different gear ratios on

the downshifts than the upshifts.



One thing common to both that I assume you do ... always use the

"Tow/Haul" mode when towing. Otherwise, it *may* get hotter than normal.

I'm having a little trouble with "different gear ratios" going down verses going up. There's only one collection of planetary gear sets in an automatic. The ratios don't change.



I think I screwed that up. It's not different gear ratios, but rather
different shift pressures (when using the tow/haul mode). For example,
like the Allison, the Ford Torqshift will sense when going downhill and
automatically downshift to apply engine braking on gas engines, saving
wear on the brakes. Doesn't apply to diesels, since a diesel has no
engine braking.


If I set the cruise control to 45 mph (for example) and am in tow/haul mode, the transmission will
downshift using the engine to keep the speed there. If the cruise control is not set, but I'm in
tow/haul mode, the transmission will sense my slowing down, with or without the brake, and downshift
- if, for example, I'm approaching a red light.



The Ford Torqshift does the same in Tow/Haul. Only difference is that
with your rig being a diesel you don't get any engine braking when
going down hills like you will with a gas engine.

Perhaps not the same amount, but plenty enough to feel.

"TOW/HAUL MODE
An innovative tow/haul mode gives automatic transmissions on select models a dual-mode shift
program. This feature raises upshift points to use more of the engine’s power for strong
acceleration and raises downshift points to help slow the truck using engine braking."

From http://www.gmc.com/trailering-towing/glossary.html

Transmission oil cooling
 

On 5/27/2014 3:20 PM, Poquito Loco wrote:
On Tue, 27 May 2014 15:08:46 -0400, "Mr. Luddite" wrote:

On 5/27/2014 2:56 PM, Poquito Loco wrote:
On Tue, 27 May 2014 14:45:09 -0400, "Mr. Luddite" wrote:

On 5/27/2014 2:19 PM, wrote:
On Sunday, May 25, 2014 3:04:31 PM UTC-4, Mr. Luddite wrote:
On 5/25/2014 8:25 AM, Poquito Loco wrote:

On Sat, 24 May 2014 18:13:59 -0400, "Mr. Luddite" wrote:



On 5/24/2014 4:03 PM, Poquito Loco wrote:

I'm thinking of putting one of these on the Silverado. Anyone had any experience with the concept of

increasing the oil supply to keep it cooler?



http://www.ebay.com/itm/PPE-Allison-Deep-Tranmission-Pan-Duramax-Allison-1000-2000-2400-Series-128051000/121345886743?_trksid=p2047675.c100011.m1850&_trkpa rms=aid%3D222008%26algo%3DSIC.MOTORS%26ao%3D1%26as c%3D22855%26meid%3D7132067336503725629%26pid%3D100 011%26prg%3D9833%26rk%3D1%26rkt%3D10%26sd%3D121335 643997







Followup to my last ...



I assume your Silverado has a transmission fluid temp gauge as well as

an engine temp gauge. My Ford F-250 Super Duty does, I know. If I were

noticing higher than normal transmission temps while towing I'd be more

inclined to add an axillary transmission fluid cooler rather than just

increase the capacity of the transmission pan.



If I am not mistaken your truck has the Allison transmission. From what

I've heard, it is a superb transmission for towing ... probably the best

thing GM has going for it in their trucks. Unless it's getting hotter

than normal, I'd leave it alone. Just my humble opinion.





Here's an interesting and informative piece about Allison transmissions. I'll probably just leave

mine alone for a while. I've never seen the temp get much over 200.



http://dmaxstore.com/index.php?main_page=product_info&cPath=16_363&prod ucts_id=668&zenid=2euu9fpbqf4tmumt6ecj7kbu74







The Pace Arrow Class A motorhome we had for a while had an Allison

transmission. It was the only thing I liked about the whole rig.



Ford sorta copied some of the operating characteristics of the Allison

in the "TorqueShift" transmission used in the Super Duty Series. It

operates similarly to the Allison, including different gear ratios on

the downshifts than the upshifts.



One thing common to both that I assume you do ... always use the

"Tow/Haul" mode when towing. Otherwise, it *may* get hotter than normal.

I'm having a little trouble with "different gear ratios" going down verses going up. There's only one collection of planetary gear sets in an automatic. The ratios don't change.



I think I screwed that up. It's not different gear ratios, but rather
different shift pressures (when using the tow/haul mode). For example,
like the Allison, the Ford Torqshift will sense when going downhill and
automatically downshift to apply engine braking on gas engines, saving
wear on the brakes. Doesn't apply to diesels, since a diesel has no
engine braking.


If I set the cruise control to 45 mph (for example) and am in tow/haul mode, the transmission will
downshift using the engine to keep the speed there. If the cruise control is not set, but I'm in
tow/haul mode, the transmission will sense my slowing down, with or without the brake, and downshift
- if, for example, I'm approaching a red light.



The Ford Torqshift does the same in Tow/Haul. Only difference is that
with your rig being a diesel you don't get any engine braking when
going down hills like you will with a gas engine.

Perhaps not the same amount, but plenty enough to feel.

"TOW/HAUL MODE
An innovative tow/haul mode gives automatic transmissions on select models a dual-mode shift
program. This feature raises upshift points to use more of the engine’s power for strong
acceleration and raises downshift points to help slow the truck using engine braking."

From http://www.gmc.com/trailering-towing/glossary.html



I don't think the "select models" includes diesels. By their design a
diesel engine does not provide "engine braking". However:

You probably have GM's “SMART” exhaust brake. According to the same
website link you provided:

"The new diesel exhaust brake is an innovative standard feature for
DURAMAX models. Unlike the traditional “on/off” diesel exhaust brakes,
the driver-selectable “smart” brake varies negative torque needed, based
on the truckload and grade. This helps reduce brake fade, extends brake
life, and gives drivers plenty of confidence when hauling heavy loads
downhill."

Transmission oil cooling
 

On 5/27/2014 3:08 PM, Mr. Luddite wrote:
On 5/27/2014 2:56 PM, Poquito Loco wrote:
On Tue, 27 May 2014 14:45:09 -0400, "Mr. Luddite"
wrote:

On 5/27/2014 2:19 PM, wrote:
On Sunday, May 25, 2014 3:04:31 PM UTC-4, Mr. Luddite wrote:
On 5/25/2014 8:25 AM, Poquito Loco wrote:

On Sat, 24 May 2014 18:13:59 -0400, "Mr. Luddite"
wrote:



On 5/24/2014 4:03 PM, Poquito Loco wrote:

I'm thinking of putting one of these on the Silverado. Anyone
had any experience with the concept of

increasing the oil supply to keep it cooler?



http://www.ebay.com/itm/PPE-Allison-Deep-Tranmission-Pan-Duramax-Allison-1000-2000-2400-Series-128051000/121345886743?_trksid=p2047675.c100011.m1850&_trkpa rms=aid%3D222008%26algo%3DSIC.MOTORS%26ao%3D1%26as c%3D22855%26meid%3D7132067336503725629%26pid%3D100 011%26prg%3D9833%26rk%3D1%26rkt%3D10%26sd%3D121335 643997








Followup to my last ...



I assume your Silverado has a transmission fluid temp gauge as
well as

an engine temp gauge. My Ford F-250 Super Duty does, I know. If
I were

noticing higher than normal transmission temps while towing I'd
be more

inclined to add an axillary transmission fluid cooler rather than
just

increase the capacity of the transmission pan.



If I am not mistaken your truck has the Allison transmission.
From what

I've heard, it is a superb transmission for towing ... probably
the best

thing GM has going for it in their trucks. Unless it's getting
hotter

than normal, I'd leave it alone. Just my humble opinion.





Here's an interesting and informative piece about Allison
transmissions. I'll probably just leave

mine alone for a while. I've never seen the temp get much over 200.



http://dmaxstore.com/index.php?main_page=product_info&cPath=16_363&prod ucts_id=668&zenid=2euu9fpbqf4tmumt6ecj7kbu74








The Pace Arrow Class A motorhome we had for a while had an Allison

transmission. It was the only thing I liked about the whole rig.



Ford sorta copied some of the operating characteristics of the Allison

in the "TorqueShift" transmission used in the Super Duty Series. It

operates similarly to the Allison, including different gear ratios on

the downshifts than the upshifts.



One thing common to both that I assume you do ... always use the

"Tow/Haul" mode when towing. Otherwise, it *may* get hotter than
normal.

I'm having a little trouble with "different gear ratios" going down
verses going up. There's only one collection of planetary gear sets
in an automatic. The ratios don't change.



I think I screwed that up. It's not different gear ratios, but rather
different shift pressures (when using the tow/haul mode). For example,
like the Allison, the Ford Torqshift will sense when going downhill and
automatically downshift to apply engine braking on gas engines, saving
wear on the brakes. Doesn't apply to diesels, since a diesel has no
engine braking.


If I set the cruise control to 45 mph (for example) and am in tow/haul
mode, the transmission will
downshift using the engine to keep the speed there. If the cruise
control is not set, but I'm in
tow/haul mode, the transmission will sense my slowing down, with or
without the brake, and downshift
- if, for example, I'm approaching a red light.



The Ford Torqshift does the same in Tow/Haul. Only difference is that
with your rig being a diesel you don't get any engine braking when
going down hills like you will with a gas engine.

Modern diesel engines do have engine brakes.

http://www.ehow.com/about_6303585_di...ake-work_.html