[Fot] vibration

[don at dcphotos.com]

I’ve had a very similar issue from the first time I drove my ’62 Spitfire down the front straight at TWS and on both straights at COTA.
Mine is more of a rumble that seems to start when I’m going flat out in fourth around 5-6K rpms.

I have had the drive shaft balanced and phased, swapped gearboxes, diffs and still it’s there.
My gearbox tail shaft has a strap going over it to help secure it in place. 
To me it feels like something in the rear. I was wondering if I had a wheel out of true or tire out of round.
Two things I haven’t swapped out.

Another thing I notice was one of my trailing arms, I can move with my hand and the other I can’t. 
They are heim joints. Was thinking maybe a toe out/in issue?

Could be the diff mounts as well, haven’t changed them out.

Don


DON COUCH PHOTOGRAPHY
www.dcphotos.com
(512)-680-3540

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