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Triumph TR6 - Frame Rebuild

Hi Folks

Now that my first visitors have left, it is now time to start rebuilding the back-end.

As most will know, I have a "new to me frame" kindly donated by Chris Trace. On my old frame there was 9 shims (in a box) for the Trailing Arms, so my question is (and perhaps I should ask Chris)"How do I know how many shims to use, and which brackets do they go on?

Les
lw gilholme

Les

The number of shims will depend on a lot of things (weight, wear) but ultimately it will be as many as it takes to align the rear wheels.

There is a home grown alignment procedure that I will forward to you. I will have to dig it out of my files. I did a rough alignment and then left the finishing touches to the professionals.

Mike
Michael Petryschuk

The shims merely adjust the toe setting, they do not really address camber adjustment. Camber is adjusted by either bracket selection and "notch orientation" or by using adjustble trailing arm brackets (previously discussed on earlier threads).

The number of shims also impact the wheelbase slightly so try to make sure that you balance the number of shims fitted to each side as you adjust toe in order to keep the difference in wheel base from left to right as close as possible.
SteveP

Mike

Thanks for the information that you sent me. Photos help too.

Steve

Thanks for the information on the balancing of the shims.

Les
lw gilholme

No problem, of course I probably should have offered up a caveat with that. You must keep in mind that we are talking about something that attaches to the welded up frame assembly that was built to the "highest standards" of 1970's era British Leyland tolerances. The main thing is that you don't want a huge stack of shims on one side and nothing on the other. Some variance in the number of shims per side is to be expected and should fall within the tolerance band.

Of course, leave it to the boys at Renault to develop a car that had a designed in wheelbase difference of ~3" (think that is the right number) between the left hand and right hand side with corresponding differences in turning circle and skid pad numbers from side to side.
SteveP

This thread was discussed between 18/06/2007 and 19/06/2007

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