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6L80 Trans problem
Posted to Transmission Forum on 6/3/2016 4 Replies

Trans works great when cold. After about 10 minutes of driving, at a low speed of about 15 to 20 mph, when you push down the gas and the trans should downshift to 2nd or 1st, it just neutrals. Let off the gas, then it hooks up fine. works fine taking off from a stop. Only does this on kick down. I have had it apart and aircheck all the clutches. I have changed valve body and TCM/solenoid assembly. Low sprag is ok. Any suggestions would be appreciated.

Dale Barnes
Sexton Automotive
Hillsboro, Ohio, USA

4 Replies Received (View Replies)


car Vehicle Data

2010 Chevrolet Avalanche LTZ 5.3L

Engine5.3 L
Trans6-speed Automatic (Electronic)