AndyK

Before I go to my mechanic, I'd like to get an idea of what I'm up against - if possible.

When I accelerate during a left hand turn, I hear a grinding type sound in the right rear. The sound doesn't happen when I do the same during a right hand turn.

Any idea what would cause this?

potent951turbo

Sounds like a rear wheel bearing. My old 951 did the same thing, and even started grinding into the rotor.

Red_Envy

hmmmm, wheel bearing sounds right for grinding noise but doesn't explain why only in turns.....

I have sorta the same issue but instead of a grinding noise, I get a squeak...like a tire rubbing, but it clearly iusn't... Driving me nuts and only happens during left turns and the noise is coming from the drivers side rear... I am guessing I have a bad shock but car sits right and push test is fine...any ideas?

Oddjob

Bad wheel bearings, front or rear, will typically make a grinding noise/feel when loaded (outside wheel during a turn).

AndyK

Yeah, when loaded, that makes sense! That would also include brisk acceleration (like when passing)?

Looks like a trip to the mechanic is in order, again!

potent951turbo

Mine only made the grinding sound during turns also.

AndyK

Checking a search, I asked the same question 6 months back! Guess I never got it fixed!

I read that rear wheel bearings would make clicking sounds, not grinding. I still think it could be an exhaust hangar, loose or adjusted wrong, causing the exhaust to vibrate during hard turns or acceleration?

potent951turbo

When mine went bad it was a horrible grinding sound, no clicking.

Oddjob

Wheel bearings grind, CV joints click. Exhaust rubbing can be deceptive - and can sound similar to wheel bearing, and may just show up during cornering. I had a turbo test pipe that rubbed on the body (caster block mount) only when accelerating during right hand turns; thought it was a front wheel bearing.

tifosiman

Sounds like your wheelbearing. Before you order the parts and get all set to do the job, check to ensure that the big nut just hasn't backed off a little bit and is loose. I've seen that happen once or twice and it will occasionally give the same symptoms.

AndyK

My mechanic did the front bearings when doing the rotors, saying they looked to be original, so he replaced them. Front end is much tighter now - I wonder if the rotors were fine, and I just needed front bearings!? Now I'll never know I guess. I assume the rear wheel bearings are also original, so after 111k miles, they might just be shot.

I'll stop by the mechanic tomorrow AM and see if a test ride reveals more to him. Are rear wheel bearings expensive to replace (time wise)?

RMills944

Check the cat...
Yes, it sounds odd, but I had the same issue - only when turning one way would it grind. Turns out the cat's heat shield was hitting the torque tube in hard accelerating turns when the car flexed right. You can either adjust the muffler hangers or trim the heat shield a little.

AndyK

I hear ya. I'll have the entire exhaust gone over at the same time, just in case.

Driving these cars is supposed to be fun, hearing the road and the engine. When I start hearing creaks, and grinding, it kills the joy pretty quickly!

Dave in Chicago

It's getting to that range of mileage. The good news is that you will eventually go around the car with the bearings, but you'll do it only once for the NEXT 111k miles

... unless you track it alot... then you get to do them a bunch!

5speed300

My new turbo is doing the same thing, the passeneger side rear also dips alot during acceleration and feels slower to respond going into turns. left turns only, the right side is fine.