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...
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175-198 pulling hard 10k up big grades. lmm 2009 running transynd Allison synthetic. The only time I've seen higher was when running dex6 and overfilled. I'd suspect if your over 210+ it is overfilled. Proper level is middle of hot level hatch marks at 172 deg at idle in park. Do a visual on the cooler inside the bumper hole as well.
