trukn1

Ok, here's the problem that seems to have no solution, hoping someone can help me out. Have a 92 LS400 with 159K miles and the problem I'm having is the rear end jumping around while driving over bumps; seems to jump to 1 side or another. Rear shock/springs were changed recently and are only 4 months old. Currently running the H&R Springs with the Tokico HP blue shocks all the way round. Had the car checked out by several different mechanics to check for rear control arm condition, bushings, etc, and have constantly been told everything is in good condition and is tight as a drum. Took car to the dealer this morning and was told the same thing. The one thing that they informed me was that because of the aftermarket equipment that I have, they would need to reset to factory specs and then go from there; price to doso $2700. They also informed me that all of the obvious components were in good condition and that, once again, everything was as tight as a drum. I'm at wits end, and want to get this right and quit throwing parts at the car in hopes of having it right. Anyone with any thoughts would immensly help me.

sonyman

Does it jump around or does it slide? I'm no mechanic, but have you checked the tires?

Scott

trukn1

Tires are fine balanced, rotated and are new( just bought june 05). Had rotated and rebalanced last month. Car seems to slide to 1 side , not much, but noticible to me. Tires are Turanza LSH 225/60/16. Thought it was my bushings, until confirmed that it was not.

RA40

iTrader: (6)

It is very hard to tell the condition of some of the bushings by visual and or pushing on the various suspension components. With the car at ride height under compression, the dynamics of these parts change so while a 180# man may not be able to find it, the 1000#'s on that corner will bring it out.

Was told by several mechanics the caster bar bushings were in good shape and no need to change. Well, having read enough here that that was the case, I had them changed. Looking inside the bushing, you could see it was split but ont he car, it looked fine.

At 160K miles if you intend to keep the car, I'd start by systematically replacing the various pairs of bushings back there.

uncle_el

agreed. sounds like the rear carrier bushings.
i had mine replaced recently (150k), and it was $200 total (parts and labor). i'm sure the dealership will charge just a bit more.

trukn1

will try replacing all bushing in the rear as well as strut mounts to see if that solves problem.