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Re: Eccentric Trailing Arm Bushings (archive)

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Posted by JamesM on June 05, 2002 at 14:02:44:

In Reply to: Eccentric Trailing Arm Bushings posted by Philo on June 03, 2002 at 18:56:47:

Where do the ecentric bushings go ? Inboard or Outboard ? Also, because they are eccentric does that mean they allow the rear toe-in to be adjustable. Lastly, how to they go in or align (position within the trailing arm).

Trailing arm bushings.
2 different numbers listed
33 32 9 058 824 (eccentric)
33 32 9 061 946

The eccentric should be first used on the inner mount, then if you need more correction, on the outer mount. The bushings are sold by the pair. Mounting the eccentric hole rearward on the inner semi-trailing arm will eliminate some of the toe-in.

Try replacing the dogbones between the arm and subframe, first. This is much easier, and helps lock the rear suspension into place.

You will need a proper pressing/pulling tool for the bushings. You can either make one yourself with some big threaded rod (7/16" or 1/2" if it will fit), iron pipe, and other parts. I'll have to see if there's a Sir Tool that does this job. I have the thrust arm bushing tool (worth every penny), and I'll have to check if it will do the rear semi-trailing arm bushings, too.

You can also simply slot the inner mounts forward to reduce the toe-in once you lower the suspension. I used a B&D RTX with a tungsten carbide cutting stone (silver in color). Use a slightly longer bolt and big washers to keep the arm from slipping back to its original position.

FWIW--I have lowered my M5 on Ground Control coil-overs and 450/300 lb springs F/R. I have Alpina 16x8 wheels with Pirelli P7000 SS 225/50/16s on my M5, and I don't have any problems with rear tire wear. The subframe in the car is unaltered from stock. But as always, YMMV.


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