Rear ride height on a 911. Adjustment? Sagging a bit.

[Mark Henry]

One of my customers has a 911 (’71 with a update body kit) and the rear tires are just starting to rub on the outside. Not on the lip but just above it.

I tried the move the torsion bars 1 spline, but that got me about a 3 inch+ raise, I only need about an inch. I’ve tried both the inner and outer splines.

If I can’t raise it I’ll cut the spacers 3/8 each side.

The car has sagged this year, as it the first year the customer has gotten some good seat time. The most time this car has seen in probably over 10 years. I spent a lot of time sorting this car out and this is the only major issue now.

[ZOA NOM]

You have to move the inner spline one direction, and the outer in the opposite direction for small increments.

[Mark Henry]

Ok...sounds right... does anyone have a link to a how to?

[Jim Sims]

Sag may also be worn and settling spring plate rubber bushings.

[Jim Sims]

http://www.pelicanparts.com/techarticles/911_torsion_bars/911_torsion_bars.htm

http://www.pelicanparts.com/techarticles/911_suspension_bushings/911_suspension_bushings.htm

[ZOA NOM]

I have no link, but I just did it on mine. You said that you tried moving both the inner and outer splines, so I assume you can re-do the process. Just very carefully move the inner spline one tooth, then pull the spring plate out far enough to move it in the opposite direction one tooh. The result should equal about .8 degree change.

[aigel]

How old are his shocks? A set of new bilstein sport shocks in the rear will help bring it back up a bit and more importantly, not allow it to swing around and bottom out.

George

[Mark Henry]

Thanks I'll give 'er a try.

[anthony]

Originally posted by Mark Henry
The car has sagged this year, as it the first year the customer has gotten some good seat time. The most time this car has seen in probably over 10 years. I spent a lot of time sorting this car out and this is the only major issue now.

I'd also make sure the rear bushings are in good shape.