This is wierd....20 MPH shimmy?

[632 Regal]

sorry it took me so long to reply, my internet was down at work and I stepped out last night. I try to hit these ASAP...kinda a game when I can help.

Anyways, glad you found the problem before something bad happened.

[wingman]

I've got this EXACT problem only no noise. I discovered it recently on my trip to see the boys at Oran Park. I pulled the wheel off and put the spare on (brand new tyre). The wobble is still there. I know my rear suspension mounts are on the way so they're getting replaced at my March service. Could bad mounts be causing it?

[wingman]

bump

[HDhandyman]

bump

OT, Wingman your message box is full!

[Toeks]

Dont want to hijack the thread, tell me to open another if its the case.
My car drives like a dream, except if I drive over some types of bumps, holes. It seems the front wheels shake violently (plus steering wheel) whenever I drive over something. It doesnt even have to be deep or nasty, even slightly mis-aligned manholes seem to induce this. I'm pretty sure the back wheels are fine. Any ideas? (I'm very new to the mechanical DIY type thing, have done simple service work i.e. plugs, filters, etc and replaced lights, but no suspension work or such).

[632 Regal]

search for "thrust arm"

[wingman]

I'm starting to see a pattern with this problem. I intend doing some pretty thorough investigating as to why back RH rear tyres are failing. As my problem is not the tyre (the result) but appears to be the source of the problem I'll see what I can come up with. I want to get it sorted before I ruin another back tyre. My initial fix will be to change suspension mounts. If not fixed I'll then get onto BMA and do the bushes in the rear end. I'll keep you all posted. This does not a appear to be wheel balance problem.

[Anthony (M5 in Calgary)]

Dont want to hijack the thread, tell me to open another if its the case.
My car drives like a dream, except if I drive over some types of bumps, holes. It seems the front wheels shake violently (plus steering wheel) whenever I drive over something. It doesnt even have to be deep or nasty, even slightly mis-aligned manholes seem to induce this. I'm pretty sure the back wheels are fine. Any ideas? (I'm very new to the mechanical DIY type thing, have done simple service work i.e. plugs, filters, etc and replaced lights, but no suspension work or such).

I'd say your front dampers (shocks) are baked. I had the same thing when one of my Konis barfed its lifeblood. Every little sharp bump would shake the car and steering wheel but the car never had that floaty effect you see on others with lower spring rates when their shocks fail.

[wingman]

OT, Wingman your message box is full!

Sorry? I've cleared it up.

[wingman]

I think I'm starting to see the cause of my problem. Below is a pic of the RH outside rear control arm bushing. As you can see it's stuffed. After reading thread upon thread about rear in work in the search section my suspicions are justified (I think). The ruined tyres are the symptoms of these and other bushes dying and not the 'cause' of the problem. Many a board member has done this work themselves. I may give it a go. Now I just have to log into BMA...