09-25-2007, 10:21 PM
Join Date: Aug 2006
Location: Concord, North Carolina
Total Cats: 5
Rear End Noise Questions
I posted this at .net too, but you guys seem to have more knowledge of swaps so maybe I overlooked something. I posted up about this a few months ago and haven't been able to figure it out. So before I dump any more time or money into the problem...
I have a 1990 w/ a Torsen unit from a 94. I swapped the knuckles, hubs, axles, and unit from the 94 that had about 110K or so miles on it.
At speeds over...say 30mph a whining sounds starts to occur from the rear...at 65-70 it is very LOUD...kinda like a full spool or posi unit sounds in a drag car. As in, louder than my aftermarket exhaust at cruise. It does it regardless of throttle application, clutch etc.
KICKER: When I turn right hard, or jerk it right, the noise stops, or gets much quieter, I can't tell, but it goes away for a second.
I've tried a few things (swapping out PPF, because my old one was slightly bent, changing driveshaft orientation, etc, etc.)
I can't figure out what it is, and these are the only three options I can think of.
-The rear wheel bearings, I've heard fronts going out, more of a thump, thump, but I've never heard what a rear sounds like on these cars. (they are separate from the hub in the rear correct?) - Because of the right turn making the sound stop, this could be a possibility?
-Could it be the CV/Universal Joints (whatever they are actually called) on the axles? How do I check?
-Could it be the backlash is setup wrong? The guy I bought it from said it was perfectly quite when he pulled it and I have no reason not to believe him. I didn't mess with anything on the inside.
Last edited by miatamania; 09-25-2007 at 10:40 PM.