Don't be. Listen to Mike.
Is Dex6 even an Allison approved fluid?
Nope...
W0RLDWIDE ALLIS0N TRANSMISSI0N C0MMUNICATI0N HOTLINE WATCH #409
January 2010
Page 1 of 1
SUBJECT Dexron@-Vl Automatic Transmission Fluid Recommendation Changes
MODELS AFFECTED: All Allison Transmission Products
Effective immediately, Dexron@-Vl automatic transmission fluid is no longer approved for any Allison Transmission,
lnc. product.
Allison Transmission, lnc. is removing Dexron@-Vl as an approved fluid for Allison Transmission products.
Only TES-295 and TES-389 fluids are approved for use in Allison Transmission On-Highway products.
Allison Transmission, lnc. will be revising its service information relating to the removal of Dexron@-Vl as an
approved transmission fluid.
For additional information, please contact your Allison Transmission sales representative or go to the Allison
Transmission web-site al www. allisontransmlsslo n. com.
EG/05083242/WA5892EN
Copyright 2010 Allison Transmission, lnc. All Rights Reserved.
TECHNICAL PUB P0. Box 89 lndianapolic, lndiana 48206
And heres a quote from Mike L
"I like Dex 3. I do not like Dex 6 as it was never tested in a cold room and destroyed quite a few Alli's in Canada a few years ago. Next they found Dex 6 was not compatible with the Allison Viton front seal and Allison had to change the compound. Dex 6 was attacking the front seal and causing leaks. What other surprises are we going to see with Dex 6?
I do not blame Allison for not approving Dex 6 and I wouldn't flush my toilet with it."