Possible Bad CV Joint

[insite]

i'm trying to diagnose an issue. basically, when i take a hard corner in either direction, i get a 'rumble' from the rear right of the car. it sounds / feels the same as a front wheel drive car with a bad CV joint. i've not heard of many going bad in the box, so i wanted to get some opinions.

i've checked to make sure the tire's not rubbing anywhere, i've checked the play in the wheel bearing (none), and i've checked the CV boots (fine). thoughts? thanks in advance.

[Topless]

Check your engine mounts.

[insite]

really? it doesn't happen under ANY condition while driving in a straight line.

[Topless]

Start Here.

http://www.renntech.org/forums/index.php?showtopic=10005

[insite]

Start Here.

http://www.renntech.org/forums/index.php?showtopic=10005

very, very interesting! you may have saved me a wasted axle. funny thing is, i first thought a tire was rubbing because the vibration felt deadned by rubber to me. a bad mount could be my issue. Thanks!

[Topless]

I hope it is helpful.

This hasn't happened on my car yet cause I'm kinda old and I drive kinda gentle. But with 67k on my car now I like to read the posts from others so I know what is coming down the pike. Saw this one last week and it stuck in my head...same symptoms as yours.

[insite]

back to square one. it's not the engine mount. i'm going to elaborate as best i can to describe the issue.

it really feels / sounds almost exactly the same as a bad CV joint in a FWD car. it seems to come directly from (or very near to) the right rear wheel. it happens whether i turn right or left, although it seems to happen at an earlier threshold during left hand turns. it will happen during slower tight turns or when cornering fairly aggressively in sweepers. the problem is nonexistent at any RPM when not moving, moving in a straight line (accel or decel), or during leisurely turns.

i'm inclined to think it's indeed a CV joint, but i've yet to encounter another person who has had one go bad, so i don't know how the symptoms manifest themselves in these cars. any thoughts are greatly appreciated.

Edited October 3, 2006 by insite

[Topless]

I'm stumped!

[PTEC]

Sounds like a wheel bearing to me. I've never heard of a CV going bad on a 986 or 996.

[Topless]

Your symptoms still sound exactly like bad motor mounts. Many 986's have reported the same problem and it was motor mounts that were worn out or slipping side to side during turns causing vibration against the frame. Are you sure??

[insite]

Your symptoms still sound exactly like bad motor mounts. Many 986's have reported the same problem and it was motor mounts that were worn out or slipping side to side during turns causing vibration against the frame. Are you sure??

i had it up in the air last night with the wheel off to change a control arm. got under it with some good light. the mount is completely shot. monday i just glanced at it and the sleeve appeared centered in the rubber. last night, the sleeve was sitting completely at the top of the mount ring.

very counterintuitive; it feels NOTHING like a worn motor mount to me. wonders never cease. new mount will be on the way when my suppliers open up for the day. Thanks again for your help.

[Topless]

Bingo! :)