jmorris
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Everything posted by jmorris
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I am happy to report that the violent shaking of the shifter and on occasion, the steering wheel while braking at speeds over 40 MPH has been solved. Apparently machining the rotors twice in 6 months by two different shops did not correct a "fat spot" in one of the front rotors. Upon rechecking the rotors, I found that one rotor had an area that was .0035 inches thicker than the rest of the rotor. I replaced the bad rotor with a new Brembo rotor and the shaking is completely gone.
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I am very interested in the results of those repairs. I would be helpful if you could have the technician comment on which parts show the most wear. Thanks.
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I have turned all 4 rotors, replaced the rear trailing arm bushings, replaced the ball joints (lower), replaced an upper differential mounting pad that was cracked, checked the engine mounts and checked the transmission mount. I visually checked the steering links and the front lower strut rods and could not detect any play there. So far nothing has helped. I did notice that after the rotors were turned that one front rotor has .003 inches of runout. I doubt that would be enough to cause the problem since new performance rotors have +/- .002 inch specs.
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I have a 1990 LS400 with exactly the same symptoms. Has any one found a solution to this problem yet?