In my 86 240 I have noticed a vibration that has been getting worse over the last few months. I replaced the shot center bearing and mount. this reduced the vibration somewhat but after a month it is actually worse. the intensity of teh vibration changes with road speed. it still shakes while coasting in N. I feel it more through the wheel and the seat. There is trany fluid leaking out of where the drive shaft comes out of the housing. Is the bearing and seal shot? the U-joints do not seem to be loose, I can grab them, twist and pull the drive shaft and it is solid.

How big of a job is it to replace the rear seal? Obviously i have to take out the two halves of the drive shaft, i can easily do that. what about the seal? I have to drain the fluid right? could someone give me a rundown of the steps involved in replacing this seal/bearing? thanks adam