I have a 1993 chevy heavy half ton. Has the 4l60e and the gm 9.5" 14 bolt rear end. I have been fighting a harsh shift problem, it shifts harsh from park to drive/reverse and also from 1st to 2nd if you are gentle on the gas. When mashing the throttle coming off a stop light it shifts to 2nd much easier and less harsh. here is a list of what's been replaced: tps,all shift solenoids,fuel filter. Anything helps. I'm almost positive the noise is coming from the rearend. Should also note that when truck is in park I can push on the truck and move it front to back about a 1/4" - 3/8" please help!

Were looking into the u joints and I will also be pulling the diff cover to look for the obvious, metal shavings, missing teeth etc. What we have discovered, is that while brake is applied and shifting from park to reverse to drive and back to reverse , the driveline rotates about 20 degrees each time we shift it around. This leads me to look more at the u joints. Every time we shifted the rear wheels wanted to jump, as in take off. Could this really mean look at the differential more than the u joints? Were looking into the u joints and I will also be pulling the diff cover to look for the obvious, metal shavings, missing teeth etc. What we have discovered, is that while brake is applied and shifting from park to reverse to drive and back to reverse , the driveline rotates about 20 degrees each time we shift it around. This leads me to look more at the u joints. Every time we shifted the rear wheels wanted to jump, as in take off. Could this really mean look at the differential more than the u joints?

I was told that the backlash being off would be noticeable by pulling off the diff cover and inspecting the ring gear for obvious wear on the edges of the gear teeth. I was told that the backlash being off would be noticeable by pulling off the diff cover and inspecting the ring gear for obvious wear on the edges of the gear teeth.