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She's Giving me the Bad Vibrations 700 1990

posted by  someone claiming to be Bob Mohr on  Tue Jul 3 00:34 CST 2001 [RELATED]

Howdy,

1990 740 wagon, wife's car.

I hit the brakes around 70 mph and the steering wheel shakes momentarily like "a dawg passing a peach pit" (a little southern vernacular, there).

The vibrations stop once I hit 50 mph, so probably not rotor warping. I used a dial indicator to check runout on the brake rotors, anyway. Fronts are .001 - .002 inches and the backs were a max of .003 inches. Volvo specs are a max of .004, so the problem doesn't seem to be there.

But wait! Isn't this a classic symptom of bad radius arm bushings? Previous owner had them replaced with the upgraded units from Volvo. I pulled the nuts and washers off last night and the bushings look brand new. With the car up on blocks, I wrestled the radius arms with whatever strength my puny arms could muster. They didn't move a lick. Ok, probably not the radius arms.

Passenger side inner tie rod is shot. I've got about a 1/16" of movement in the ball joint. I'll be replacing it. The cover is cracked on the passenger side ball joint as well. I'm going to stick a crowbar on it and check for movement there.

Has anyone had experience with braking vibration caused by a worn inner tie rod/ball joint before? Anything I might be missing?

Thanks y'all

Bob Mohr

1990 745 B230F (with mysto vibration)

1992 245 B230F (solid, solid as a rock)





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