DG
12-07-2012, 12:48 PM
So my 93 R/T TT had a serious steering wheel shake under braking. Oddly, it wouldn't show up under slow speed braking, and occasionally you could panic-brake very hard and it wouldn't show up, but an entry to a freeway offramp braking zone could generate a very serious shake.
The fact that it didn't happen all the time eliminated warped rotors as a possibility.
What did the trick was replacing the front lower control arm rear bushings - the big bolt-on bastards. One was completely shot; the other was iffy.
Note that on my car (an early build date 93) these bushings are not identical; there's a left and a right.
With those bushings replaced, there is a slight, high-frequency, low amplitude shake during very hard braking which is probably either a mildly warped rotor or maybe some slop in the steering rack somewhere. But the difference pre and post bushing replacement is night and day.
I don't detect any other handling change, and the bad bushings were not detectable by trying to wiggle the wheel around.
DG
The fact that it didn't happen all the time eliminated warped rotors as a possibility.
What did the trick was replacing the front lower control arm rear bushings - the big bolt-on bastards. One was completely shot; the other was iffy.
Note that on my car (an early build date 93) these bushings are not identical; there's a left and a right.
With those bushings replaced, there is a slight, high-frequency, low amplitude shake during very hard braking which is probably either a mildly warped rotor or maybe some slop in the steering rack somewhere. But the difference pre and post bushing replacement is night and day.
I don't detect any other handling change, and the bad bushings were not detectable by trying to wiggle the wheel around.
DG