Fan and pulley assembly since I have owned it. Replaced struts. Got the car from relative. Was very well maintained through Lexus service Dept since it was new. Hard to isolate vibration has been getting progressively worse or I am becoming more aware of it. see below.
Awesome ride... however it has developed a vibration which seems to be coming from trans/engine/torque converter/rear disc differential or maybe just bad tires and / or suspension bushings. Has anyone been able to isolate this "harmonic" vibration on a similar LS? Have swapped out wheels and tires, disc/rear differential, motor mounts, trans mounts. still vibrates subtly at 1800 RPM in neutral sitting still. Really annoying on the road at all speeds. Feels like every rock can be felt as I drive down a relatively smooth road. If front ball joints and control arm bushings are bad could the vibration be traveling from every little bump and rock through the tires and the frame and cause this "harmonic" vibration in the steering wheel and gear shift? This harmonic thing is really apparent at 55+ mph.
I just got a 92 with <90K on it and it too rides like it has a bad bushing somewhere. My wife doesn't feel it, but I know what these cars drove like after parking about a hundred a night at a ritzy hotel back in 94. I can feel every road irregularity, but I have new ball joints in front. The upper control arms have a tiny bit of play in them and I suspect that this is the problem as I can't find any deteriorated bushings under the car.
I had the same problem, but after changed two front tires and both front braking pads; no longer vibration at any speed.
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