Originally Posted by Isambard

I've just skim-read this thread, so I don't know if anyone has suggested this already, or indeed if you have done this....

I had a skyline a few years back and had similar to what you have described. It was the 3-piece alloy wheels that were buckled.

Basically I took it to a skyline specialist and he suggested swapping the front wheels with the back. The wheels were NOT staggered so we did. I took it for a drive and BINGO! It WAS the problem.

I'm assuming your wheels are the one piece standard, and that they are staggered as standard, so obviously it wouldn't be a good idea to do what I did, but perhaps borrow a set of wheels, all 4 to be sure, and then go for a run. This would at least elliminate the wheels/tyres, so you can then look at other sources if its not the wheels/tyres...

Forgot to add, the way we found out was to put the car on the ramp jacking it under the chassis so the wheels could turn. We started the car, put it in gear and saw all 4 wheels turning, and could physically see the wheels out of true. If you can't borrow another set of wheels, then just simply go to a garage that can do this.