After spending money on rear u jiont and spider gears, my 95 Jeep still vibrates at high speed. This only happens when I load the engine at 55 mph and above. I also still get a ratcheting noise when I start from as stop.
In addition I get a drive line recoil sensation after I apply the brakes and cost to a stop. This recoil doesnt occur if I put the car in nuetral before I apply the brakes. This tells me it a drive line problem.
Anyone have a clue about these problems? Very weird... the mechanics can't figure it out.

 

your ring and pinion could be sloppy... but i would hope they checked that when there where new spiders installed