Driving down the highway and tranny shifted from six to fifth and wont shift out of fifth. The truck through a P0776 code. Already cleared the codes a couple of times, but keeps acting the same. What would cause this and how could i fix it.
brand new gmax 6pack. you think the sensors on the tranny and tc could cause it
Need to put a Tech 2 on it and moniter speed sensors. Who installed the kit? Could be a cut piston or leaky C1 ballance piston.