btw, transmission oil temps usually are not as high as engine oil temps. In
this case, 40W oil is more viscous than 10W-40. In addition, there is a belief
(not as much as in the past, but still a belief) that 10W-40 does not _stay_
40W at operating temps as the engine hours on the oil increases and gets closer
and closer to oil change time. Transmission do not suffer from dry bearings at
engine startup (as the engine does) because the gears are bathed in oil.

WRONG! Automatics are not bathed in oil. Over half the fluid is in the torque
convertor while the remaining is held in the pan for the valve body and the
clutch packs. The reason why "bathing" the gears is not critical at startup is
there is no stress or load on any tranny gears or bearings when the damn thing
is in park and you're cranking the engine.

Dennis
ASE Certified Master Auto Tech and
Marine Engineer in training

Transmission do not suffer from dry bearings at
engine startup (as the engine does) because the gears are bathed in oil.

Denny, when the hell was the last time *you* saw a marine transmission that had
a torque conventor? When the hell was the last time *you* saw an automatic
transmission that ran on 40W oil?

you are a fraud, dude.


WRONG! Automatics are not bathed in oil. Over half the fluid is in the
torque
convertor while the remaining is held in the pan for the valve body and the
clutch packs. The reason why "bathing" the gears is not critical at startup
is
there is no stress or load on any tranny gears or bearings when the damn
thing
is in park and you're cranking the engine.

Dennis
ASE Certified Master Auto Tech and
Marine Engineer in training

Transmission do not suffer from dry bearings at
engine startup (as the engine does) because the gears are bathed in oil.