Rear wheel alignment ?

A

Aussiecsi

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I have had an ongoing issue wirh vibration on what appears to be LHS rear .It seeeeems more pronounced when under load/acceleration.

Recently,after parking the car,i noticed that there was the smell of burning rubber and the tyre was warm to touch ( compared to the RHS ) and the rim is not hot . When tthe car is jacked up,the wheel turns freely and it has been suggested that the
 
If you had an internal rubbing of the tire you would see marks on the tire and rubber damage.
So I will venture the guess that the problem is a stuck brake on that wheel, the heat comes from the friction of dragging that tire against the road, and perhaps also the vibration. My theory does not explain how the wheel spins freely when on jacks, so I have to speculate that it happens after tapping the brakes (a ballooned brake line?).
If you do not like that theory I have another one, and I will blame the hub centric spacer the wheels seems to use. Is it possible the wheel is loose under weight at the spacer so it flops around?

Tests:
Swap RHS with LHS rear wheels, the Pilots are not directional I think so you can swap them, keep the spacer with the wheel, see if the problem moves to the other side. If it moves it is not the brake, and it may be the spacer.
Or swap with same side front wheel, the vibration may now be apparent in the steering wheel if it was the wheel/spacer.
The ultimate test is to swap the wheel with the spare, which ideally has no spacer.
 
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the wheels were swapped/rotated a while ago with a similar outcome . Attention also given to ensuring the rim fitted snugly and fully tightened. The burning rubber smell seems to come from the tread surface which is consistent with the warm- to -touch feeling on the same surface . All this seems to suggest to me that the wheel is not rolling truly and the resulting road friction is generating both the vibration and burning rubber smell .

I intend to get the rear alignment checked (front is fine) but i guess I'm asking what can be done to rectify the wheel alignment if that is indeed the issue. (or what could be causing it ) ?
 
The rear end is not adjustable. if the bushes in the trailing arm to subframe were shot or perhaps the subframe to body bushes loose / bad that would allow the geometry to be out. Other than that a distorted tyre but unlikely with michelin
 
Thanks Ian, yes,trailing arm bushes were on the list too .I know I replaced the two body bushes ( Motorsport type) when restoration commenced in 2013 and others probably done too but maybe the crappy W&N rubber type have failed.
 
a quick check with some string and a tape measure Measure the distance from frt to back on the wheels first and compare side to side see what you come up with Run a string from the frt to the back wheels on each side and see if there is a difference in toe from the side to side Camber you can check with a large square These are some quick although not 100% will be close enough to give you some more clues

Thanks, Rick
 
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