not again!!! rear wheel alignment

[AussieJohn]

How is the rear wheel toe-in built in? The chassis pick-up points are parallel and the rear wishbones seem to be the same so where is the inbuilt toe-in coming from? Any answers? cheers, John.

[Craig Elliott]

I guess it would come from the overall alignment of the chassis/A frames and the rear hub carriers...

Originally there was no facility to adjust the rear suspension - the toe-in would have been designed in. I guess with factory tolerances being what they were, plus any bumps (or damage to the suspension arms caused by jacking the car up in the wrong way) could lead to the suspension settings being off. Apparently people used to do cut and re-weld jobs to set the toe-in but there are now a number of companies that make adjustable rear A frames - these have a turnbuckle or similar in one of the tubes and turning these adjusts the toe in.

Craig

[john.p.clegg]

...and it only takes 1/16" over the wheel rim (14")to provide the toe-in,how parallel are your A-frames??

John

[andyelan]

Hi John

I've often asked my self this question.

As you rightly point out both the inner suspension pickup points and the wisbones themselves are designed to be parallel to the longitudinal axis of the chassis (I'm talking here of course about how things are meant to be and not not how they might end up after accident damage of incorrect manufacture). That then only leaves the upright, so that has to be where the toe-in comes from.

Actually when you look at the chassis/rear suspension design as a whole and think about the easiest way to manufacture things, setting the toe-in in this way is the best and most obvious way to go about things.

Regards
Andy

[AussieJohn]

Thanks for the replies guys, I will try and measure a couple of spare uprights and see if they hold any secrets, cheers, John.