i replaced my broken differential mount a couple of weekends ago. it was broken when i bought the car, so i never drove it with a fixed mount until just now. now, when i decelerate, if the engine is below about 3k (engine braking only) the car rocks foward and backward as it decelerates, and i hear a new clunking sound coming from the diver's side rear. this had always been there, but i just attributed it to the busted mount. i've read through tons of threads on the differential mount subject, but to no avail. any ideas?

 

you sounds just like me i bought my 90 the same way ....with a broken diff mount and i get alot of sounds out of my rear end now such as squeeking and the chugging when your not in the gas under 2000-3000 ... its unbearable sometimes and the girlfriend hates it..... i dont know if it is indeed normal and as for the sound you have i am not sure..... but i get alot of sound out of mine too.....

 

It can very well be a worn out CV joint.

Andrew

 

yeah, it's pretty irritating sometimes.


is there any way that the worn cv joint could produce a sound that sounds like it's only coming from the driver's side?

 

These are all things the rear end shouldent be doing. Im having the same kind of problems. Im thinking its a combination of bad mounts, u-joints, low fluid etc.

 

which mounts are you referring to specifically?

 

I had the same problem on my S4 N/A. it turned out to be the u-joints

 

ok. the u-joints seem like a likely source, because when i was under the car, i could turn the propeller shaft about an 1/8th of an inch either way before it bumped up against any resistance. does this sound like it might be worn out? the previous owner claimed that she replaced it very recently, but i guess that a year and a half (most of it occurring before i owned the car) of driving around with a busted diff. mount could wear it out prematurely?