Put new tires on my truck and going home I decided to give it a little tune-up (blow some smoke out). So at a stop light I put it in 1st gear and it jumped to 2nd before I move the shifter. Next after I let off of the throttle the tranny was slipping. It did this, I was only able to go about 30mph until I came to a place I could pull over. Fluid level was good, but color might be a little dark. I restarted the truck and it ran fine until I tried to manually shift again and it repeated itself to not shift into 3rd gear. Shut down and restart, runs and shifts but not sure it is normal. I checked codes and got DTC 39(TCC Stuck Off), DTC 68 (Transmission component slipping), and DTC83 (TCC PWM Solenoid Circuit Fault). Any ideas on what’s happening? I have 127,000 miles on it, a 1995 4 X 4.