915 output flanges vs. 944 cv joints

[trevorbrady]

Originally Posted by boygenius

The early and late aluminum trailing arms use the same axles and are interchangable.

BG, is this a FACT, or second hand information? I don't mean to doubt you, but I want to be 110% sure!
I need to get drive shafts for my project pretty soon (i'm making do with type1 shafts and CVs as the type1 arms are still in place at the moment), and I need to know EXACTLY which ones, as mistakes in buying Porsche parts are costly mistakes!

I have early aluminium arms. I thought I needed early-late (make sense?) drive shafts to suit, but the early aluminium arms were only in production for a short while and are rarer compared to the late-late arms. If I knew for a fact that late-late drive shafts would do, I could get them pretty easily.

Just a thought, but how do type 2 drive shafts measure up, length-wise, against the various type1/924/944 drive shafts?
I know blind chicken has a page with comparisons between shafts/cvs, but I don't remember them comparing overall lengths of shafts. Anyone ever definitively document the differences in lengths?

[zen]

early and late arms both use 21" axles. i had a set of early arms on my bug first and then switched to late. there is a thread on here somewhere with good detail and pics as i was going through it. the difference in the width between the arms occurs at the hub. compare a rotor for a early and late and you will see what i mean. in fact, there is also a pic somewhere on here where i stacked the two arms and took some pics.

[boygenius]

What Zen said, plus make sure that you get the 33 spline axles and not the 28 spline axles. 33 spline count is what VW uses so type1 type 2 CV's will fit. The turbo cars came with the 28 spline so get some N/A axles. I use places like www.pelicanparts.com to cross reference part numbers in their online catalog. Look up what year your rear suspension is from to check on the axle assemblies and there will be a description of what other models and years those axles fit.

[Michael Ghia]

All the flanges which I have delt with have 18 splines. These are known as the course splined flanges and the teeth are about 2.5mm across.

I can't remember how many splines are on the fine splined flanges.

MG

[LOAF]

Picked up the engine, now (like leaving work right now) heading to pick up a 911 (901) with hopefully the correct flanges..

From talking to the seller.. (Porsche Guy) He said he had the right flanges to mate to the 944 CV and Axles.. He also confirmed Coarse not fine..

I will take pics and let everyone know..

Now I need money for a DTM.. getting the Video but still debating on the shroud.. Joe Cali vs DTM .. Cheaper vs $$$..

[LOAF]

Just got the tranny.. Haven't started inspecting.. I will take pics and look at the output flange and compare to the 944 later this week..

Very excited.. I bought it off a guy for 300.00 911 (901) with flanges and a 911 front tranny cross member.. So I will try the MG route..

This guy had a garage with a lift, and more space in the garage than my house.. more in Porsches than what my home is worth.. When he asked what car I had and what the tranny was going into.. I told him a bug.. He rolled his eyes in disbelief.. Then I told him that it would be Type IV powered.. I think what he said was that it was probably cheaper buying a porsche..

I will keep everyone posted.. on my findings..

And as always thanks for the help.. best support community out there..

ALex

[boygenius]

How did the tranny install go. Did you get your CV's hooked up??