P0776

[Chrisw21_2000]

2007.5 6.7 stuck in limp mode. P0776 code was only code. Changed solenoid b in the trans and replaced fluid. Week later same problem. Any ideas on what it could be? I believe there’s a tsb on a issue. Thanks

 

[Timd32]

From what I found TSB is for:
2007 3500 Chassis Cab models equipped with a 6.7-liter diesel engine and an AS68RC automatic transmission

It includes checking and reprogramming the TCM and ECM if necessary.

I'm really not up on those transmissions...