Erik N

I understand how the forward flex link on the lower arm deflects during deceleration, causing a toe-in scenario which "slowplows" the rear into line.
My question is, does that same link work opposite during acceleration? Causing a toe-out that helps squirrel the rear around turns?

I guess what I am saying is that... My car LOVES a good powerslide! OMG is that thing fun to drive!

EDIT: yeah I know the LSD and cool tires contribute as well.

ammonman

IIRC the Weissach axle only induces toe-in on the rear under decelleration during cornering such as a mid-corner throttle lift.

Mike

RKD in OKC

I don't know about the 928, but both the 951s I had would toe out under acceleration squat, so much so that if the toe was not set in enough to start with the car would dolphin back and forth left to right then right to left under hard acceleration. That was with an LDS Tranny. Have not experienced this with either the 90 GT or my current 94 GTS, but it may be because I am not radically messing with toe settings.

IcemanG17

odd ???..... Okay our "toe controlled" axle works like a passive rear steer.....it has NO negative effects.... So while it causes toe-in under certain scenarios that increase stability it does NOT cause toe out, under scenarios that cause unstability..... Here is a "hint"....the "kine-matic" rear suspension of the 993 that was revolutionary on a 911 was a copy of the 928 design + almost 20 years.....

RFJ

I am not sure this is the place for this but would like to know what is causing the arsend to jump up and down when I am on a slight corner and accelerating hard. Is it poor shocks or a poor driver? the shocks are all most as old as the driver,well sort of. Oh yes its a 85 euro with posi and it goes like stink, or is that the driver?

The Fixer

Nice car, it's those fat tires and your LSD at work.
Regarding the original guy's question, the age of the w. axle's old bushings could be the cause. When under my car i have wondered when they will need replacing.

BC

Shocks are a wear item. If they have more than 50k miles or 6 years they are to be replaced

dr bob

Similar 'jumping around' reported when that bottom through-bolt isn't tight enough. It pinches and locks the inner sleeve of the shock bushing and the trailing arm with the bottom of the upright/carrier. The upright is sandwiched in a couple convex washers, and the arm has it's own sleeved rubber bushing. Not tight enough lets the bits move enough to really upset the rear of the car in a corner.

The top link is a known wear point too. Symptom is that the camber is too negative and won't adjust far enough.