Transynd vs Dexron VI
Can Dexron VI be used to replace Transynd on my 2004 Allison 3000 transmission for a fluid and filter change?
Forum Discussion
rgatijnet1 wrote:Charlie D. wrote:Allison ONLY recommends transmission fluid that is TES-295 approved.
The Diesel Supplement manual for the 2018 D/A recommends Dexron VI above temps of -40 F. Below that it specifies TES 295. That holds true for 2013 and up model years
So basically anyone that has an Allison transmission anywhere other than the frozen arctic should not use Transynd TES-295 rated fluid, since most of the lower 48 has temps above -40 F. Only use TES-295 for temps less than -40 F. I think you need to reread your source. :B
You need to reread my quote. I quoted the manual and it's recommendations. Neither the manual or I said NOT to use Transynd. My source is from GM page 125 of the Duramax Diesel Supplement. It has been in that manual from when I bought my first 2006 GM diesel and 2013 and 2018.
" DEXRON®-VI Automatic Transmission Fluid.
Allison Transmission Only: For areas where ambient temperatures are
below -40°C (-40°F) use Synthetic Transmission Fluid approved to Allison Transmission specification TES-295 (GM Part No. 12378515, in Canada 88900701)."
