I'm changing to 6 bolt 951 CVs like Andy and Aaron.

I need some education on the differences in 944/951 stub axles and whichones will work. I have been told there are early and late stub axles (short and long).

Please tell if this will work.

Following is the planned setup:

- 914/901 transaxle
- LSD from a 915 with six bolt output flanges
- 951 (1986) inner CV joint
- 914 axle (modified to fit 951 CV)
- 951 (1986) outer CV joint
- 951/944 stub axle ???? which ones????
- pre-74 911 stub axles


Thanks

Eddie 914

ps: the 3.2 should be ready soon and I need to get all the other stuff finished soon! Any one up for and install party?

How about ... are the pre 1986.6 944 and 951 stub axles the same?

Thanks in advance


Eddie

i don't know the exact year, but you'll be able to tell when you see them, the wrong ones look really wrong ...
you want the stubs from the "long" axle.

944 stub axle:


and don't forget the spacer that goes on the 944 stub axle to hold the wheel bearing in place ...
Andy

i have 951 stubs.....

same thing ... mine are from a 944 turbo ...

Andy

QUOTE (SirAndy @ Feb 24 2006, 07:23 PM)

QUOTE (Aaron Cox @ Feb 24 2006, 02:35 PM) i have 951 stubs..... same thing ... mine are from a 944 turbo ... Andy

not arguing... just saying mine have a 951.XXXX part number....

i forget the splinage on them... 23? or something funky....

and 33 spline CV's off an early 944 i recall

QUOTE (SirAndy @ Feb 24 2006, 06:23 PM)

same thing ... mine are from a 944 turbo ... Andy

We gotta find a monkey flinging feces smiley...

these are what you DO NOT want

83-85 use one stub 85.5 on use another. 951 first produced in 86 which would mean the later style stubs are what you want. CV stayed the same for the later models but I can't swear the stub didn't change again in 87. (front suspension was modified slightly in 87 making 85.5-86 cars oddball in the front) Turbos use a different CV and axle but the stubs I "think" are the same as the n/a

QUOTE (Aaron Cox @ Feb 24 2006, 06:32 PM)

these are what you DO NOT want

924 and early pre 85.5 944.

QUOTE (scotty b @ Feb 24 2006, 07:38 PM)

83-85 use one stub 85.5 on use another. 951 first produced in 86 which would mean the later style stubs are what you want. CV stayed the same for the later models but I can't swear the stub didn't change again in 87. (front suspension was modified slightly in 87 making 85.5-86 cars oddball in the front) Turbos use a different CV and axle but the stubs I "think" are the same as the n/a

early CV's have the same number of INTERNAL splines as a 914 axle has OUTER splines (33)....
late (post 86.5)944 CV's have 27 splines (not what you want...)

i knew i had this somewhere....

You've got PRE 85.5 CV's and post 85.5 stubs?? Also, why not use the 944 hub?

QUOTE (scotty b @ Feb 24 2006, 07:43 PM)

You've got PRE 85.5 CV's and post 85.5 stubs?? Also, why not use the 944 hub?

if a 944 hub is same offset etc as a pre 74 911 hub, why not.....

aye... my head hurts... been a while since i read and researched this.....
you want early cv's and the above posted stubs.......

Gotcha, I missed one of your posts there I've got an 86 parts car I'm using the rear arms from on a Manx and was going to use the axles and hubs on my 914, but if'n the splines is diif, I might hafta find some early CV's. I just tossed 3 sets of 924 suspensions last year

QUOTE (scotty b @ Feb 24 2006, 07:53 PM)

Gotcha, I missed one of your posts there I've got an 86 parts car I'm using the rear arms from on a Manx and was going to use the axles and hubs on my 914, but if'n the splines is diif, I might hafta find some early CV's. I just tossed 3 sets of 924 suspensions last year

the hard part is finding the COARSE splined 915 trans output shafts with the right 6 bolt pattern.....

This is getting really confusing, especially parts being referred to as 951, when only 1987 and newer 944's use axle parts that start with 951. Before that they use 477 numbers, right? Somebody please clear this up. I am about to sell my 914/6 stub axles so I can upgrade to this larger CV setup. My understanding is that all the early pre-87 axles and CV's are the same, even on the 924, which only uses a drum instead of a hub. P/N 477.501.103 for the shaft, 477.501.263 for the stub, and 477.501.065 for the hub. This is 924, turbo, and 944. Auto trans is different. I'm assuming that 477 being a VW starting number, that these are the cv's that fit on the 914 shafts, not the 951, strictly porsche ones, PLEASE CORRECT ME IF I'M WRONG.

I wish I had a pic to show,


But Aaron's correct in the layout.


I went to a junkyard last fall,and grabbed the cv/axle setup outa a mid 80's 944,and it pieced it together on my car.It all went together fine,and has about 1/2-3/4" of shaft travel.

The car I pirated the parts from was definately not a 951 turbo.

Ron

what is meant by "914 modified axle"? who/where in ca can this be done?

is a "pre '74 911 hub" the same as 914-6?

where do you get the "custom spacer to repace 944 dust seal"?

modified axle: take a little nub off the 914 axle... lathe operation. local machine shop.

pre 1974 hub: i believe a six hub is the same. 69-73 were all same IIRC

custom spacer: you make it, or have machine shop make it...

i have yet to finish my swap...

really sorry for the


can you just use a 944 dust seal rather than make a spacer, even if the seal wont be sealing anything?

by 33 spline pre 86.5 cv, do you mean turbo, or it does not matter ?

Why not use the 100mm 911 stub axle? It doesn't need the spacer. Also, you can use the later 911 hubcentric hub if you make up a 5mm spacer (Difference in bearing width) or machine it to the old length.

Ok.. I have been driving around on this setup for a year now......

From the outside to the inside......

1. pre 74 911 hub.

2. 914 wheel bearing.

Here's where things get varied...

3a. 944 stub axle (find one with aluminum trailing arms.. it has the right one)

with spacer the same thickness as the step in the stub axle. This is to hold the inener race of the bearing in place.

3b. Alternate method. Take the 911 hub and cut the same thickness off the back of the hub as the step in the 944 stub axle.

4. 944 6 bolt cv joint on the outboard end.

5a. 914 /4 axle shaft. You have to cut it behind the splines to accomodate the 944 CV.

5b. If you did 3b, then you can use the 944 axle shafts. The difference in length of moving the stub outboard will allow you to use them.

6. 944 6 bolt cv joint on the inboard end.

7. Paper cv joint gasket from a 76 911.

8. 76 911 drive flange from a coarse splined 915 transaxle. It will bolt into a 901, and has the same bolt pattern as the 944 cv joint.



That is the parts and modification list.

Any questions???

i have been looking for number 8 for a long time...

and not gonna pay 200 for a pair....

AA

It's not the 944 dust seal. The spacer holds the inboard race in the wheel bearing. Without it you will have some very excessive play in the rear bearings. You will know this because you can't get the brake pedal to pump up due to pad knockback, and the wheels will wobble around.




The 911 hub uses the wrong sized cv joint. It won't match the 944 cv, and the internal splines of the 911 cv are different from the 944/914-4 cv. Also, the 911 axle is shorter and wont' work on a 914 without a bolt-on spacer. And that adds another point of failure.


Wes Hildreth and I came up with this setup over a year ago.. and I am the first person to actually run it.

[
[quote name='John Jentz' post='699822' date='Jun 9 2006, 05:41 PM']
Why not use the 100mm 911 stub axle? It doesn't need the spacer. Also, you can use the later 911 hubcentric hub if you make up a 5mm spacer (Difference in bearing width) or machine it to the old length.
[/quote]

The 911 hub uses the wrong sized cv joint. It won't match the 944 cv, and the internal splines of the 911 cv are different from the 944/914-4 cv. Also, the 911 axle is shorter and wont' work on a 914 without a bolt-on spacer. And that adds another point of failure.
[/quote]

The 911 stub axle comes in 108mm 4bolts 2 roll pins (this is the one you don't use) and 100mm 6bolts - this is the one you can use. I didn't say anything about using the 911 c/v's or axles.