Ok, find the problem. The TCC solenoid was not in all the way. While I had everything torn down this time I went ahead and installed the transgo hd2 kit and shift solenoids A and B. Shifts firm in all gears and goes into overdrive and stays.
Ok. I have a 1993 K3500 with the 7.4l and 4L80e trans. When I purchased the truck it had an issue with the trans. While just cruising in overdrive no matter speed, it would lock and unlock. My rpms would go up and down. Well, I decided to go underneath and take a look at the plug on the trans...
Hello. I am the proud owner of a 1993 Chevrolet K3500 Crew Cab dually with a 4" lift. Currently it has the 7.4l with the 4L80E but I am looking at doing a complete overhaul and installing the 5.9 cummins with the NV4500 later on when money permits me to do so.