915 question?
 

im going to install a 915 transmission of a 76' porsche 911 i am running the 86' 944 turbo aluminum trailing arms with the 86' 944turbo axles my question is will these work on the 915? if not then what axles do i use?

We carry a product (axle) that mates 944 axles to your 915, PM or email if interested.
VR
Alex

That depends on what CV's size the 915 had. Its not the axles, but the CV's that need matching. Some 915's had 100mm CV's, like mine. 944 is always 100mm...

If the 944/24 always is 100mm could it be possible that one type of 944 driveflanges could fit the 915 diff spline?
And could a 944 axle be used for 100mm outer cv and 930? inner cv?
Are the inner splines in the cv`s the same for all?

I used early 944 axles and CVs on my 915 and they bolted straight on, not all 915 flanges are the same. FYI, mine was from an SC..
Rich

as always ricola delivers the goods. so basically if the 944 CV connects to the 915 drive flange than i can use the 944 axles. are all 944 924 and 944 turbo axles the same?

924/944 axles are not all the same, ally armed cars have much longer axles, I'm fairly sure the CV's aren't the same bolt pattern either...
There are posts about axle length, I think the early 944 ones were slightly shorter than stock type 1, I think that must have been balanced by the slightly wider 905 trans as I didn't have any problems...

Well, if this helps any. I've got a '86 915 out of a Carrera, and '87 944S CV's and shafts with '87 ali arms. They bolt to the 915 flanges.

The axles that are slightly shorter than T1 I recently found out are 410mm, whereas the beetle axle is 415.5mm

Mike

Then you were really, really lucky, as most late 915's have 110mm flanges/CV's and the 100mm 944 CV don't go with that.

Wally, I thought it was kind of strange too. The axles are marked '87 944S, but may be wrong (written with paint marker from salvage yard) I had one of the axles with me when I went to pick up the tranny, and the CV bolt holes matched the 915's.

I looked at my axles again today, and noticed that they are marked 944 S2 (not 944 S). This maybe why they bolt to the 915 flanges.

I'm sending my 915 flanges and stub axles off to precision alloy to be converted to 930. I modified my dune buggy Jamar shifter to work with the tranny. The 915 has such a short throw and shaft rotation the Jamar shifter has a lot of throw to spare!
Jeff

Hi

Just so you know, the 930 splines are different to other VW/Porsche CVs, so you will need special axles.

Steve

Good info, as I didn't know this either.

I think however that the 110mm stock porsche CV's (90% of all 915's carry this size as stock...) are probably more than most of us will ever need.

Hi

I going to use 930 CVs because of their extra operating angle ability. Sway away make suitable axles in many sizes.

I have 2 sets of "turbo" CVs, one set is very thick which I believe is from a 930, and the thinner ones I have are from a later turbo Porsche.

VW have 33 tooth axles and Porsche 930 have 28 tooth axles according to Sway away.

Steve

915 trans and cv
 

Im slightly confused if anyone can put me straight here please.... I have purchased what I believe [was told] is a later model 915 tranny. That being the stronger diff model. [I understand 1975 on?] Anyway I am running the original steel type 1 arms. I have measured the cv flange on tranny appears to be 100mm. Can someone advise me what cv to look for? Are all the 100mm cv's the same bolt pattern? will it fit the type 1 drive shafts [spline]. Basicaly will the right cv get me running? Your help and advise much appreciated. Brent. ....

Brent,

Basically all 100mm joints are the same bolt pattern. The early 944 (83-85), T4's, Thing and bay window bus CV's all are 100mm with the fine spline (33). They will fit onto a T1 shaft, but they are wider (thatn T1) so you will have to machine the shoulder on a T1 shaft to accomadate the extra width of the joint for the retaining clip. Alternatively, you could leave the clip off...? The 944/T4 joints have smaller balls than the bay window joints, so the 944/T4 ones can handle more misalignment.

I think for your setup the ideal solution is to get a complete early 944 axle with joints, and then change your stub axles on the wheel side to 944 early aswell, so you have 100mm joints everywhere.

The later 944 (86+) are also 100mm, but they are coarse spline and do not fit onto a T1 axle-shaft.

The big 930's are 108mm I believe...

Hope that clears things up,
Lanner

there you go...............
http://i10.photobucket.com/albums/a1...1.jpg~original

I got drastic and cut the entire rear torsion out to put a custom one in. I'm cutting about 9" from the middle so I can move the tranny up and forward. I don't have to worry about clearance as it's in a kit car. I took a rear torsion adjuster and split it in half and will weld each end on the inside of the torsion housing then fab up a mount for the tranny and engine support. Lots of fabbing but I still need to calc how far up and forward I can go without the 930 CVs binding. I think it's about 4" forward and up. ANyone else do this?
Jeff