901 flange-driveshaft combination?

[kium]

Hello to everyone,
I'm rebuilding an old 901 gearbox that came from a yard and both output flanges of the diff. are missing.
I have also got two driveshafts with the gearbox, that look quite shot.
They are the 4 bolt and 2 dowel kind.



I've been looking around (in Spain we have no PelicanParts sadly) I have found that compatible CV are made by various manufacturers: SKF, Mapco and GKN.

I know SKF are one of the best in bearings: VKJA 8829 (51€)



GKN seems to be Lobro some how (is this correct?) GKN - 21897 (50€)




Mapco im not sure if they're good quality, they are cheap and look exactly like the original with that brass finish. MAPCO - 16998 (37€)



so it would be an easy fix, buying 4 CV and attaching to the original shaft

Here comes the question, as I have to get buy a pair of output flages, and these CV seem to belong to a later model (2.7 or SC ?) should I get the later flanges?
Or earlier CV?

Thanks for your help!

[Trackrash]

Post the number stamped on the bottom of the trans.

If the trans is a '69 up to '71 the 108mm four bolt trans axle flange is what you want. They were used from '69 to ~'75. At '75 1/2 Porsche changed to the 100mm 6 bolt CVs, which I don't think is what you want.

Have you seen this thread? 915 differences?

This also has some good info. 83 3.0L Engine & Trans Swap to 85 3.2L Engine & Trans - Axle Options

Here is what I know.

[kium]

Fantastic threads Gordon. Thanks.

I've learned I have to check my diff. and see what kind of splines it has.
I was also wondering that a custom made gearbox mount shouldn't be too difficult to build and there it appeared in the thread. This forum is just amazing.

The numbers on my gearbox are: 901/13 _ _ 719 4906

The CV's I have do not match the chart
Mine are 4 bolt, 108, 32, but tommorrow I'll double check and mesure the axle too

I don't know if this complete driveshaft will fit my 1970 2.2t in lenght, I see now there are many different lengths.

[roblav]

Your 108mm 4 bolt CVs and axles should bolt right up to the 911 2.2T stub axle. The flange swap is what 914 4 to 6 conversion people do all the time, but those flanges are now more money than they used to be. Make sure you don't buy the Sportomatic flange because they are different.

[kium]

Thanks Roblav for your tips