ckyconan2003

iTrader: (2)

Anyone know what causes this problem? The car has made this noise for as long as i can remember but I know it's not right. I've read about "auburn rear ends" having a similar problem in the past but never really pursued it because my other 1997 A4 SS didn't have the problem and neither did my 96Z/M6.

Anyone know what this might be? It only occurs when I’m coasting.

97Z28SS

iTrader: (5)

Is the rear lube low, when was the last time it was changes, also do you have the Torsen diff or a limited slip? If it's a limited slip then change the gear lube and add the limited slip additive.

jrwilliams95z28

Could it be something banging around suspension wise?

ckyconan2003

iTrader: (2)

I honestly couldn't tell you if it's ever been changed. I'm pretty sure its a limited slip car, being a 97 SS and all. I thought that might be a good idea.

What weight of diff fluid does it use? I'm hoping I can use some Mobil 75W-140 or 75W-90

I doubt it's a suspension peice, it has a rotational sound to it. You know?

SS RRR

iTrader: (2)

It could be a Torsen carrier as well. Clunking could also be worn bushings on the lower control arms. Do you know if the SS has Level II suspension?
Just read you state it is a "rotational sound..." If that is what I think it means you could also have a loose pinion shaft which causes there to be too much play between the ring and pinion gear. When there is slack in the drivetrain is when you would hear it the most.

ckyconan2003

iTrader: (2)

It has the Bilstein suspension (which I think is the suspension II option) and I think you hit the nail on the head. There is definitely too much play somewhere back there. Is this something I can fix? Rear end gears scare me.

SS RRR

iTrader: (2)

Level II then you shouldn't have to worry about bushings really ever since the important pieces are poly. As far as the pinion is concerned you can take the driveshaft off and see if there is any thrust play. Other than that I have no idea where to go from there.

NewOrleansLT1

My car makes a "BANG" in the rear sometimes when it shifts into 2nd only when driving it normal. I don't get it..

cardo0

Try a driveline shop (or 2)? Usually diagnose is free. Its rather hard to diagnose something like that over the internet where driveline shops do it all day long. Dealer can also but will charge $100 min fee and not nearly as good at the driveline.
Bryant is so close to Little Rock i cant imagine no driveline shops nearby.

cardo

SS RRR

iTrader: (2)

Could be lots of torque transfer in 2nd gear compared to others. That too could be a LCA bushings problem.

93Euphoria

Not to hijack but mine makes a clunk when ever I put in into gear. Could be my u-joint giving out, but I highly doubt this isnt the case for the OP.

cardo0

Not to hijack the OPs thread but the cluck when moved into gear on mine was a missing trans mount bolt and the other lose.

cardo

ckyconan2003

iTrader: (2)

I may give that a shot, really not sure what it is. It's been making this noise for as long as i can remember?

Does anyone know what weight of gear lube needs to be in the diff?