[Grady Clay]

Another important area here that I don’t know the answer is the length of the splines inside the CV joint and on the axle shaft? The '928' version, '69-'71 version and 930 Turbo version are axially ‘thicker’ than the ’72-’75 911 version.

For example: The 108 mm CV joints became axially ‘thinner’ in 1972. I don’t know if there was a corresponding change in the axle shaft splines length.

This is important when combining the ’69-’71 and ’72-’75 108 mm CV joint, the ‘928’ CV joint and even the 930 Turbo CV joints with the various axle shafts.
(The 930 Turbo axle shaft is much shorter than the 911 version.)
Is a 930 Turbo CV joint splines compatible with others?



Our 108 mm Lobro CV joints are very robust and long-lived if properly lubricated. In fact I consider them ‘fine’ parts in our 911s.

One of my good examples is my friend Dave with a 600+ hp SBC and huge Hewland in his 914. I gave him some used ’69-‘71 911 CV joints on 914-6 axle shafts in 1974. They are still perfect after decades of SCCA racing.

There are shops that rebuild Lobro CV joints to specs higher than original. I suspect these are a LOT more than $79.

I would want to inspect, measure and know some historical, reliability and longevity information about the current aftermarket parts. It may be that ‘good used’ OE Porsche parts are better.

Best,
Grady