"Mr. Luddite" wrote:
On 5/24/2014 9:33 PM, 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.

Appreciated. It is the Allison. The book says 200F should be the max,
but I've approached that
several times just on I-95 - during stop and go traffic. But I've also
read that 235 to 260 isn't
unreasonable. I'll look into an auxiliary cooler, if they make one. The
bigger pan increases
capacity by 5 quarts. A friend just installed one.



Your transmission holds about 13 quarts of fluid stock. Adding 5 more
quarts won't make it run any cooler .... it will just take a little
longer to get up to max temp and a little longer to cool down.

There are several auxiliary transmission coolers advertised for your
truck, some fan assisted, some not. You mention that you see the temp
go up in stop and go traffic. Maybe all your factory cooler needs is a
temperature controlled fan that will turn on at a certain setpoint.

I have pretty much the same truck. 140,000 miles, no tranny cooler. But I
only tow about 4500#, but over some steep mountains. Seems to stay normal.
Only time I really saw it climb was a 100+ day! and a 7000' mountain pass.