The Allison has problems burning clutches when you add 85 hp. So the tranny could be slipping or the programmer defueling so the trany wont get damaged.
Have you ever looked into getting a Transgo jr? Should help some trany problems and make shifts firmer.
I believe they all defuel to some extent since they just modify the stock tune. Stock tune has defueling programmed into it to save the tranny. With a programmer, it just makes it more noticeable.
I had the same problem with my LBZ. Turned out to be the fuel filter.
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Related Threads
?
?
?
?
?
Chevy and GMC Duramax Diesel Forum
3.8M posts
207K members
Since 2005
A forum community dedicated to Chevy and GMC Duramax diesel owners and enthusiasts. Come join the discussion about modifications, towing, classifieds, troubleshooting, maintenance, and more!