91 volvo rear end shakes

Hi there, the first thing I would check is the tyres, one could have a boulle in the side wall, if it continues you should take it to your local mechanic, good luck

check overdrive or shift fuses. look in owners manual for location

is it a 4x4? check the front u joints.

i think it is your enginemounts. It cured my volvo when i changed them. Ware and tare had softened them over the years

Fuel Filter yes! Then ck fuel pressure. But it may be a Converter.

Could be that there is a clog at the tank-there is a screen there- can be accessed through access panel behind rear seat- also try taking off fuel line at engine and starting engine--if there is fuel present then I would rule out the tank screen problem. Good luck--let me know if that helps. C

You have identified the problem when you pulled the drive shaft and the shake was gone. So you know it is between the tranny and the rear end. If it is not the universal joints, then you have a warped drive shaft.

it could be a motor mount check the condition of it or it can be that something with the suspension might need attention . . those things can cause vibration at certain speeds

i had the same problem it was the u joints

It's most likely the drive shaft bearing which is in the center of the shaft mounted to the car. You can get a new one from Rapido and your problem could be solved. May want to consider looking at resolving the issue soon as the vibration will raise havoc with the drive train. A remote issue could be in the rear end itself whereby if someone drove the car most of it's life lugging the gears (standard transmission) the rear end gears tend to prematurely give out causing a similar condition. Best result is to simply find a new rear end at a salvage yard, just the center pod and replace. Good luck!