Hey. So my 85 gs 12A is making these low vibrating noises like something is rubbing on something in the rear. i replace the U-joints, pinion bearing, some other poop in the diff, but i didn't want to go too far because it got a little complicated. uhmmm i haven't yet balanced the differential, and I'm thinking about doing but not sure yet. But here's where it gets interesting, i posted a while back with the vibration problem and someone replied saying, "i had the same problem, and my drive-shaft was rubbing against the surrounding area so i just bore out the area!!!"
i thought this may not be a good idea, and i've been noticing that my rear end kind of just sat when i went over a speed bump and hardly came up. so now I'm thinking that my rear end is sitting low enough for the drive-shaft to be rubbing the surrounding area. if anyone has any input, just reply. Thanks homies, and homettes!
oh and since i need new struts in the rear, then what's the best and and most cost-efficient struts(i dont' really have alot of money)?
Grant

 

If te problem is the differential, then find a replacement. Look for a model with an lsd, and you won't regret the "upgrade".

If the problem is suspension, then check with www.re-speed.com for replacement parts. Bushings would be the first thing I would suspect based on the description, or maybe a bent shock that wasn't working any more. Spend the extra few dollars for upgrades if you plan on keeping the vehicle for any lenght of time. Otherwise, if you want the cheapest route and just stock replacement parts, check with www.rockauto.com