P0777 How bad is it??

[Duramax5]

Ran my truck at the track tonight n got a new best of 13.41 @ 99.01 mph but might have hurt the trans ... Hit limp mode on 2 runs n threw on p0700 n p0777. How bad is it?

 

[LBZrcks]

Quick Search:

P0777 indicates an off going clutch did not get released fast enough before the on coming clutch applied. ( tie-up ) It's important to know on which shift this code was thrown. If it was 3/4 it can rip the spline off C2 hub and P2 planet. Get it fixed before you hammer on it any more.

 

[Duramax5]

Sounds like a :baby: tune for me or awhile