Allison transmission high oil temp concerns
Finished a trip last weekend and noticed tranny oil temp nearing the red zone on my 2004 silverado. Now, a few weeks ago, we did drive through a big swarm of gnats that really coated the front of truc...
Forum Discussion
If you hit 260, dump the fluid and replace. Allison spec is 2 dump and fills a few hundred miles apart. would be a good time to pull the two hoses from the side of the tranny and blow out with compressed air (backwards). You may have friction material clogging the coolers. There are two, the primary is a oil to water in the radiator, the secondary is the oil to air in front of the AC condenser. Both need to be clear or you will cook the tranny pretty fast. There are aftermarket oil to air coolers, but at 260 you have far bigger issues - unless the existing cooler is bad.
