1170 mile cv joint failure Options

[mb911]

Well 1170 miles on my cv joints. Driving last evening took off slow then gassed it in first. Let off shift to second and hit the gas again and pop. Cv cage broke.. well that sucks.. anyway time to replace with some other setup. I have some extra CVS and will install but wanting a more permanent solution.

For reference 2.4 -6 with S pistons, solex cams, ported heads.

[ClayPerrine]

From outside to inside.

1. 1976 911 Hub
2. 1976 922 stub axle
3. 1985 944 turbo CV joint.
4. 914-4 axle - turn it in the lathe and add about 15mm to the space beyond the splines.
5. 1985 944 turbo CV joint
6. 1976 911 coarse splined drive flanges.


The 944 turbo CV joint is a six bolt joint that is much thicker than a 914 cv joint, but the internal splines are the same as a 914-4. So the CV joint is capable of handling way more power than a stock 4 cylinder joint.

The axle has to be modified to accommodate the thicker 944 turbo CV joint.

The 76 911 hub, stub axle and drive flange are the same bolt pattern as the 944 turbo CV, and they use the same outer wheel bearing as a 914. So this all bolts together. You have to use 944 turbo CV joint gaskets and CV bolts.

The coarse splined drive flanges come from an early 915 transmission, but they will bolt into a 901 transmission with no modification.

You can use 944 turbo stub axles, but you have to add a spacer on the stub axle or the bearing won't tighten up.

Hope that helps.

Clay