In Reply to: E34 WANDERING.... posted by Joe Mazza on November 03, 1999 at 11:17:53:
: I seem to remember a thread on E34 wandering. I recently had my thrust arm bustings replaced to correct a problem with a shimmy when braking at speed. It fixed that problem completely, but now the car seems to wander excessively, requireing quite a bit more concentration to drive than I remember before the repair.
: Any thoughts as to what the problem might be?
: Joe Mazza
: '90 535i(m) 211K+ miles and still going strong...
Joe, when you replace the thrust arm bushings, you only snug the bolts down in place, then have to lower the car to get the weight on them, then finish tightening the bolts. Has something to do with the unsprung weight, i dunno. It's possible your mechanic didn't do it correctly, and if they were just tightened on the lift, i've heard it could cause the squirrely behavior you describe. Might be worth asking about--
The other thing to check is your front alignment. If your old bushings were REALLY bad, the new ones COULD affect your toe-in, sort of like moving your front wheel axis outward. They should toe-IN, point toward each other slightly, which helps your car maintain a tight straight line.
I'm no expert, my new thrust arms/bushings are still boxed in my garage, but these are the items i was told to watch for by my friendly tech at import autohaus. He said 9 outta 10 times the car doesn't need to be realigned when replacing the thrust arms, but you might have #10.
ron 89 525i (125k, sharked and still going...slow)