CV and Axle Cross Reference
 

I recently needed to sort through a bunch of CV's and axles to find the right one for a customer. To help me figure out what was what....I ended up arranging and labeling parts.

Since I have seen many questions come up on this subject...I decided to document the results and share them here.

http://forums.pelicanparts.com/uploa...1299800764.jpg

Picture is worth a thousand words...diameter of the CV is the outer diameter of the outer race...Width is the width of the outer race.

Axle length is measured from end to end and axle diameter is the OD of the splines.

Comment or corrections welcomed.

Thanks Tom, good info and I have to look for a pair of Turbo axels
Bruce

Hi Tom -

Great info. I did the same thing recently - albeit on a much smaller scale - for my axle mix & match.

http://forums.pelicanparts.com/porsche-911-technical-forum/591069-cv-joint-axle-half-shaft-compatibility.html

All good info!

Tom D.

Tom,

GREAT, thank you.


Can you count the splines?

Can you add the differentiation between the ’69-’71 108 mm and the ’72-’75.5 thinner version.

Can you measure the thickness of the inner race and note if they are symmetrical.

Do you have access to 914-4 and 914-6 (they are different).

The SWB should be labeled ’65-’68 as in the table.

Tom helped with a good post (#12).
http://forums.pelicanparts.com/porsche-911-technical-forum/591069-cv-joint-axle-half-shaft-compatibility.html


Thanks again.

Best,
Grady

corrected pic

thanks Grady

http://forums.pelicanparts.com/uploa...1299807100.jpg

Tom,

What a great compilation!

do you have a scale to weigh these components on?

Randy and Grady

I'll what I can do to add the information you've requested.

CV Compatability
 

Tom,
In your picture showing the CV joints side-by-side the 108mm one for the 85.5 - 89 shows a raised lip on the spider, which I believe faces the inside of the joint. The one to it's left, for the 100mm 75.5 - 85.5 does not show the lip. I'm not sure if this is because the photo is of the outside of the CV or if the 100mm one does not have the lip.
Which is correct for the 100mm 75.5 - 85.5?
Jack

Grady's subtle hint made me realize that there is a difference between the '69-71 CV (thinner) and the '72-75.5 CV (thicker). I went back and discovered I had both types on the shelf. I updated the chart and the photo with the added CV. I also weighed each CV and axle and included that data in the chart.

I am still not clear which axle goes with the the '69-71 thin CV. If I had to guess, I would say it is the same axle as the later 85.5-89 CV. Does anyone know?

Jack....The 85.5-89 has the raised lip as shown on the inner race. The 75.5-85.5 does not have this lip on either side of the race.


http://forums.pelicanparts.com/uploa...1299878440.jpg

This is a GREAT REFERENCE! Thanks Tom.

Now...

Since each transmission has different flange requirements can we start another thread with similar information for the output flanges on the 901 911 and variants of the 915 transmissions? I know I still get confused on the fine/coarse spline output flanges.

Thanks.

[wt] = grams?

also I'm not sure re the 2 wt. columns in each row?

thx much for doing all this

Tom,

It is the other way around:
The ’69-’71 is thicker and the ’72-’75.5 is thinner.

I think an important measurement will be the axle length (distance) for seating the thick vs. thin CV joints.
I think I recall the axles being the same overall, just cut differently.
We need to figure this out.


There is a typo in the chart: 923 not 932.
This is where Porsche’s ‘bean counters’ thought they could get away with using the 923 (2-liter 912E) 100 mm part on a 2.7 911S and 3.0 SC.
Not so, IMHO.

We need to find someone with Dealer info ca. ’80-’84 about the 100 mm CV joints.
There was an ‘unannounced’ ‘non-recall’ to deal with the loose axle issue.


Can you measure the ball diameters?

Is the ’85.5-’89 108 mm, 6-bolt the only one with an asymmetrical inner race?
Which way does it go?
This is a 928S axle assembly and I think the 911 version still has a 928 P/N.


I’ll go pull an axle out of my 914-6 racer and see if I can find a 914-4 version around.
I recall the six uses the same 28-spline, 30 mm diameter as the ’69-’75.5 CV joints.
I have the ’69-’71 thick version on the racer’s 914-6 axle shafts.
The four is the same diameter but a different number of splines (stupid VW-Porsche thing).
Those will make worthwhile additions.


Thanks for putting up with my ‘hints’.
For the first time, we have a real opportunity to get all this ‘right’.
The next step will be the flanges.
This is a real ‘bag of worms’ that needs sorting out.
I used to have much of this info but it was lost 25+ years ago.
Most of this is from my lame old memory.

Best,
Grady

Randy...Weight measurements are in grams...In each row, the first is the CV weight and the second is the axle weight.

Grady... I have the early LWB thick and thin backwards??....I'll check and correct

This clears up a mystery for me. I narrowed the rear track on my '72 by 10mm each side and just happened to come across a pair of axles at a swap meet that are 9mm shorter than the originals. No one could identify them for me but they are almost certainly the '69-'71 bits.
regards,
Phil

I knew this was in print somewhere:
“ © 1971 Dr. Ing. h.c. F. Porsche K.G.
From 4810.21, Supplement XXXI, 1974, p. 3.1-1/1.

Someone had difficulty finding a German-to-English translator and proof-reader that day. :rolleyes:



The reason for the new "supporting plates" (‘moon plates’) is the new version tin cover has profiles for clearance of the balls and the old style did not.
The moon plates changed to clear these profiles.
These are other subjects of investigation.

Interesting is the then-current culture of touting a “Lighter Version”.
Almost unique to the late ‘60s to early ‘70s.
After the 1972 model, the ‘bean counters', took over.



Tom, does your ‘shelf’ have tin boot covers, ‘moon plates’, bolts, Schnorr washers, circlips, conical spring washers and boot clamps?
How about stub axles and transmission axle flanges?

Best,
Grady

PS: For the newer Pelicans reading, some may ask “Why is this degree of trivia important?”
Over the years and for many reasons Porsche changed various sub-systems.
Usually this was to apply more modern technology.
Occasionally it was to reduce manufacturing cost.
Rarely the result was less-than-satisfactory.

Pelicans commonly want to either improve the technology in their cars, return to original after some PO change, or correct some of Porsche’s (rare) mistakes.
Documenting these changes and retrofit ability is important for this.
G.

Thank you guys, you have no idea how big a help your posts have been.

Before starting a new thread I hope someone can answer a few questions I have about the 911 wheel hub and wheel stub axle as used on the 85.5-89 year cars.

What is the wheel bearing size, OD, ID and length?
What is the spline used on the wheel hub, OD and number of splines?

Tom,

I have a GKN 911-332-923-01 CV joint ordered from Pelican in my hand and the outer race width is 32mm, not 36mm as you list. Can you verify your measurement?

Based on the above information, does anyone know what the differences are between the 911-332-030-01 and 911-332-923-01 CV joints other than the 2mm width difference (30mm vs 32mm) in the outer race.

My race car has the GKN 930-332-037-08 axle kit. According to WorldPak, that axle kit comes with the GKN 911-332-030-01 CV joints. Yet, as best as I can tell from looking at fiche, the Porsche OEM axle kit comes with 911-332-923-01 CV joints. Also, everyone lists the 911-332-923-01 CV joints as the correct part for the '89 Turbo. The 911-332-030-01 CV joints are for certain 964 and later cars.

Thanks,

Scott

I pulled one off the shelf and rechecked it.

http://forums.pelicanparts.com/uploa...1421871977.jpg

http://forums.pelicanparts.com/uploa...1421872211.jpg

Thanks for what you do Tom. You are very much appreciated.

Henry

Tom,

Are you sure that thing is a 911-332-923-01?

Scott

It is a Lobro at 108 mm with 6 bolts and is part of my Porsche stash. I assume it is the late 911 CV as labeled but I could be wrong.

Since I didn't find it in when I searched for it yesterday, thought I'd tack it on to this thread.

When reassembling the bearing assembly, the thick portion of the inner should align with the thin portion of the outer flange flange. Not sure if there is an inside or outside portion to the outer flange, hopefully someone will chime in on that.

It's obvious to know when you didn't put it back together right as there will be no perpendicular axial movement. When assembled properly it should be able to more like your wrist.

http://forums.pelicanparts.com/uploa...1422556813.jpg

You have it backwards. The CV in the photo is assembled correctly.

Here is a CV joint fresh out of the GKN box:

http://forums.pelicanparts.com/uploa...1422558140.jpg

The outer race of a CV joint has a grove around the outside. That goes toward the outside of the axle assembly.

The star (inner race) has a raised surface on one side. That goes toward the inside. The cage has an edge that is thicker on one side than it is on the other. The thicker edge goes to the outside.

Yeah thanks, what my brain though was not what the fingers typed... go figure. Corrected now.

Scott,

I have a set of '87 Carrera original axles on the shelf at home. I can measure the inner/transmission side CV joint if that would help confirm the dimension you're looking for?


Looking at some Porsche PET and printed parts reference info I have, the inboard CV joint for the 930.332.037.08 axle is a 911.332.923.01 Tom's listing is for the older 930 axle thru 1985 and actually the part number shown for the CV joint is incorrect. That CV joint should be 930.332.034.00

I think WorldPac is wrong in that they're either showing the wrong part number for their joint, or worse, putting the wrong joint on their axle?

Kevin,

Through trial and error, I figured out what parts I need. It just took a while.

For example, the axles from GKN/WorldPac come with a boot flange that requires an older style boot: 901.332.293.12. All of the boot kits for what the axle is supposed to be come with the 928.332.293.02 boots. These boots are for a boot flange with a recess and the boots have a rib that fits in the recess.

Anyway, I know what to order now....

Scott

I seem to have a issue with a set of the Moon Plates I ordered... they are spaced at 47mm centers, part # 911.332.191.00 however my axles seem to be at 44mm centers.
1981 SC 915 Transmission.

Anyone able to offer any clues to this? have I ordered the wrong one.... can't find another part #, also checked on my pet file and part # is correct.

Thanks Brent

The 100 mm 6 bolt CV's used from mid '75 through mid '85 did not use lock plates. The PET shows them but I have never seen lock plates on these CV's.

Thanks Tom,

That explains it, will install without lock plates.
Locktite, schor washers and torque them in.

Thanks again.

You could retro fit them with 993 PET# 993 349 191 00 locking plates Pelican Parts - European Automotive Parts and Accessories - Porsche • BMW • Mercedes • Volkswagen • Audi • Saab • Volvo • MINI
or even 100MM VW plates.

http://forums.pelicanparts.com/uploa...1466314173.jpg
VW plates shown, you will need a little longer socket bolts to accommodate the space for the plate and lock washers. I would not recommend locktite unless it is light to medium strength.

Either way, recheck the bolts after 300-500 miles or maybe sooner to insure they have not come loose.

I have updated this chart with some corrections an additions since my last time posting it.

http://forums.pelicanparts.com/uploa...1471869720.jpg

Sorry, but 75.5-85.5 the socket bolt is M8 vs 85.5-89.0 is M10 :eek:

nice.
I did not know that about the cage.
I had one bad joint that was due to a bearing sticking in the grove in the cage, at least that is all I found wrong. I had to grind the slot out ijn the cage so the bearing would not stick.
when I put that CV back together( yes I am reusing it) the center part would not move freely like it should. (part of why it went bad I suspect). I had to flip the center part around so it would move freely.IE, the grove on the outer part is now towards the inside but the center part is on the axle correctly.
if the cage was in backwards would that make it sticky or bind up?

cant believe I did 4 CV's and only one would have the cage wrong.
i was going to flip the bad one anyway and let the bearings ride on the "good" side of the outer race, just to see how it would wear.

Yes that is correct.

I updated the chart once again.

http://forums.pelicanparts.com/uploa...1471874436.jpg

Tom, thank you for your attention to this-very helpful!

dho

I am not sure if the spline count for 64-68 SWB is correct in the tab. Isn't the spline count 25 for SWB? Could someone please verify?

I would need an eqivalent CV joint for my SWB...? Does anybody know which CV joint is compatible to SWB and available?

Thanks and regards

Philipp

Phillip

You are correct. I just checked one. I have revised my chart. Thanks for your attention to detail.

http://forums.pelicanparts.com/uploa...1476036202.jpg

... and to complete the swb-chart... here is the porsche No. Cv only: 901-332-031-10
and the löbro number:C153100199001