Transynd vs Dexron VI

pigman1 wrote:

rgatijnet1 wrote:
Allison ONLY recommends transmission fluid that is TES-295 approved. Several manufacturers meet this spec. I would not use any fluid that does not say that it meets the Allison TES-295 specifications. The older transmissions did come with a non-295 Fluid, probably Dex III in your case, but why go with any inferior fluid when Allison now recommends a fluid that meets TES-295 in their older transmissions. You do not have to buy Allison fluid if you don't want to give them the money but I would definitely recommend buying the newer spec fluid from someone, anyone, instead of using an older fluid. Saving a few bucks on a transmission that can cost $5000+ to repair just doesn't make sense. BP, Castrol, and others make the TES-295 fluid that you need. Try to find one on sale and use the right, most recent fluid, instead of using a fluid that Allison abandoned many years ago for their transmissions.

This is the answer. If you want a graduate education on TES-295 fluid go to http://www.irv2.com/forums/f125/former-allison-transmission-fluids-engineer-89293.html but be prepared to read 51+ pages. EVERYTHING you need to know.

I talked to Tom Johnson last week about the sample of trans fluid I sent for testing. He said if you test the fluid annually, and it tests okay, the fluid is good for 300,000 miles...in other words "life" for an RV. The biggest concern is that it could get contaminated by coolant, engine oil, etc.