Originally Posted by crawler
the pass is steep frequently we see a motor home broke down and being towed back down, or a pickup with large camper. most of the time the radiator is steaming or the transmission has lost a large amount of fluid on the road. Sounds like a good idea to service the transmission.
as much as I like the good old AT545.. I surely would NOT want one on a steep pass..
transmission fluid can and DOES boil...
lugging a transmission WILL get it hot... by lugging it i mean running it against the stall speed RPM of the UNLOCKED converter and the differential between converter shell speed and transmission inpiut shaft is high... you will make TONS of heat..
a Lock-up transmission like an MT643 or the allison 1000,2000,3000 is a MUST in the serious passes...
as is a transmission cooler... just servicing the transmission wont prevent it from over-heating.. and all it takes is ONCE with the fluid 250 degrees and that transmission will cook...
servicing it will not hurt it.. but also make sure its ready to run a mountain climb like that... an external fan-forced cooler and a trans temp gauge at the very least..