[s-cars] Good news - bad noose

[Robert Myers]

Hi Y'all,

Suspecting a blown RF strut cartridge I pulled mine (Bilstein HD).  I 
pulled out mu trusty BFPW and found I needed a BiggerFPW.  A four foot 
piece of pipe took care of that.

The good news - the cartridge and the strut bearing both appear to be OK.

The bad news - the problem leading me to look at the cartridge wasn't 
caused by the cartridge which could have been replaced under warranty.

The problem: a severe shimmy in the RF wheel/tire (it feels almost to be 
airborne about once each revolution) during a high speed (85-90 mph) left 
sweeper.  There is also a slight imbalance in that spot which can be felt 
slightly at highway speeds.  The frequency of the imbalance vibrations 
closely matches the shimmy frequency.  The shimmy goes away if I slow down 
to 80 or below or accelerate to 95 or above.  My thinking was that a blown 
strut might be failing to dampen out the vibration when at the natural 
resonance frequency for the setup.

Other possible problems might be:

1.      tie rod ends
2.      ball joint
3.      subframe bushings
4.      lower control arm bushing

Getting in there with a pry bar and seeing if anything moves more than what 
might be appropriate gave me no clues.

The bushings are all original ~ ten years old and have traveled nearly 220K 
miles.

What have I overlooked?  Any suggestions?


_____
Bob
Http://Chips-Ur-S.com

'95 urS6 Cashmere Grey
RS2 turbo/EM
Lucas/Delphi 37# injectors
Custom MRC software
Stromung Exhaust sans kitty
BIRA System 3 brakes
Custom brake lines
Centerforce clutch
100/130 watt H1 Eurolights
Ultranator alternator upgrade
RSB
EGT
Samco Hoses
2 Watt dash light bulbs