early 911 hubs, will they work on 914s? Options

[davesprinkle]

OK. From what I've gathered, a rear 5-lug conversion requires one of the two following approaches:

1. 914-6 hubs and early 911 stub-axles.

2. Redrilled 914-4 hubs and unmodified 914-4 stub-axles.

Can anyone out there explain why the following wouldn't be another option?

3. Early 911 hubs and early 911 stub-axles.

To wit -- what is it about the early 911 hubs that prevent their use on a 914?

[sj914]

The early 911 stub axles use the big 108mm cv. There is nothing wrong with using them. They are a tight fit though, not much room left after the 108mm cv occupies the trailing arm pocket.

To wit -- what is it about the early 911 hubs that prevent their use on a 914?

Well i think it's because you would have to find axles with two different splines (One end would be for the 911 cv and the other end for the 914 cv). Another option would be to use cv adaptors for the transmission side. It would adapt the 108mm to bolt onto the smaller axle flanges of the 914 transmission.

[Eric_Shea]

The early 911 hub would work... you'll just need the 914-6 stub axle again.

The problem is... they're around $600.00 (just for the stubs axles). Most even sell for more than that...

[Cap'n Krusty]

True "early" 911 hubs are completely out of the question. They're meant to be used in an arm with inner and outer wheel bearings, have only about a dozen splines, and are much longer. You're talking about the common 911 hubs that were made from 1969 through 1973. They could be made to work, but the expense would enormous. The Cap'n

[davesprinkle]

Thanks for the info, guys. It's clear from your comments that I was, ahem, confused about WHICH 914-6 part was required.

OK, so the combo is either:
914-6 stub-axle and early 911 hub
OR
914-4 stub-axle and re-drilled 914-4 hub

So, if I may be allowed to revise the question:
Why won't a 911 stub-axle work with a 911 hub when mounted in a 914 trailing arm? Or, how does the 911 stub-axle differ from the 914-6 stub-axle? Can it be machined to work properly? Sj914 mentioned that the CV flange is too large. Is it possible to redrill the CV flange and cut down the OD?

I realize that I'm belaboring this point. Thanks for your patience.

[sj914]

The 69-73 hubs and stub axles will work on the 914. The Early 65-68 hubs won't work because they have to use an inner and outer bearing on the arm and they are too long.

As the Capt. said you would have to go through a lot of $$ just to make them work, of course they could work, but you'd have to pour money into getting the right length axles, plus the early stubs(69-73ish) uses the 108mm cv which uses a different spline count than the 914's.

Can the stubs be machined down and drilled for the smaller 914 cv's or the smaller diameter 911 cv's? The answer would be not that I can see. I've got 69-73 hubs and stubs, the stubs would have to be filled in the center then machined flat then drilled for the new bolt circle. With all that work, you could just use the early hubs and stubs and get a custom axle with two different splines. Again your looking at money.

Of course you could just get the 911 hub and 914/6 stubs and be done with it. Again bring $$$

[Dr. Roger]

you could have the best of all worlds by using the fat CV'd 911 axle (they DO fit barely), hub, stub and attached to the trans using these...

someone said i might need a spacer for the stub but i didn't. stubs were identical length as stock 914's. =-)

(IMG:http://www.914world.com/bbs2/uploads/post-2-1137178052.jpg)

end result

(IMG:http://www.914world.com/bbs2/uploads/post-2-1138502332.gif)

[gopack]

I went this way. Eric Shea does good work, see the link in his post up above. No muss, no fuss, no playing with brakes.... BOLT ON! In case you were wondering, it uses redrilled 914 hubs