the transmission does not want to engage after first gear into second or overdrive.

I've always had good oil pressure when it started to get cold it started to drop to nothing when it would warm up

Usually upon acceleration the enging seems to be missing. It will make a popping sound, and feels like a slight stall, and I can feel the gas pedal jump a bit. It seems to do it less when the OD is turned off but it still does it some. Most noticably on climbs and from stops.

The u-joints in my rear drive shaft broke and my rear drive shaft fell out. I was in 4 wheel drive at the time. I was able to drive the truck home using front wheel drive only. I replaced the U-joints and put the driveshaft back in place. Now however, my truck will not engage into reverse or drive. No matter what the indicator shows it just acts as if it is in neutral.