Forum Discussion
wq93
Dec 04, 2018Explorer
As noted by an earlier poster, some of the earlier Allison production used seals that were not compatible with Dexron VI but were compatible with the earlier Dexron III. I would definitely NOT put Dex VI in a 2004 since the Dexron VI fluid spec did not come out until 2005. I had to check the Allison serial # when I had my 2006 GMC Sierra to see if it had Dexron VI compatible seals.
Use the recommended Allison Transynd, this is a case where trying to save a few dollars can result in a short term savings with a big long term expense when seals harden from exposure to the wrong fluid.
Use the recommended Allison Transynd, this is a case where trying to save a few dollars can result in a short term savings with a big long term expense when seals harden from exposure to the wrong fluid.
Grabo64
May 24, 2024Explorer
Chevrolet Dealer (Ourisman in Alexandria, VA) specified and sold me AC Delco Dexron VI for my 2004 Duramax with Allison.
About Motorhome Group
38,716 PostsLatest Activity: Oct 21, 2015