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> HOW TO: Convert to real 5-lug in the rear using 944 CVs
SirAndy
post Feb 6 2008, 01:38 AM
Post #1


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Convert to real 5-lug using 944 CVs


This Article describes how to convert the rear axles on your 914 to give you real 5-lug hubs using a mix of 914, 944 and 911 components.

Tools and Supplies:

  • BFH
  • Two new 914 rear wheel bearings
  • Four new 944 100mm 6-bolt CV joints including mounting bolts, boots and grease
  • Two 911 ('75 - '79) 100mm 6-bolt coarse spline transmission output shafts
  • Two output shaft seals
  • Two 911 ('75 - '79) 100mm 6-bolt stub axles
  • Four 911 100mm CV gaskets
  • Two 911 ('69 - '73?) hubs, must have same bearing surface width as the 914 hubs
  • Access to a lathe

Step 1: Preparing the axle shafts

Remove the CV joints from your old axles and machine both ends of your axle shafts to allow the wider 944 CVs to slide on.
You'll have to remove 4mm of material to make up for the wider 944 CVs.


4mm of material removed:


Stock 914 CV on the left and a 944 CV on the right




Step 2: Putting it all together

Grease up your new 944 CVs and slide them on the machined axle shaft *without* using the stock spring washer behind the CV!
Make sure the CV slides all the way on and don't forget to put the circlip back onto the shaft to prevent the CV from sliding off.
Note: Make sure the "groove" on the outside of the new CVs always points away from the axle (see picture with the complete axle).
Remove the old stub axles and hub. Remove the old wheel bearings. Install the new wheel bearing in your trailing arms.
Make sure the bearing surface on your new hubs is clean and press in the new hubs. Install the new stub axles and tighten the axle nut.
Remove the old output flanges from your transmission, replace the seals and slide in the new 911 flanges.
Grease up both, the output flange cup and the stub axle cup and install your new axles. Don't forget the CV seals!
Tighten everything to spec and enjoy!


911 coarse spline output shaft and 911 stub axle:


944 CV on 914 axle shaft:


Test fitting the output shaft on the 944 CV:


And at last, the completed axle. The top shows the original 914/4 axle, the bottom shows the new axle:


Mounted on the car:



Info compiled by SirAndy
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Posts in this topic
SirAndy   HOW TO: Convert to real 5-lug in the rear using 944 CVs   Feb 6 2008, 01:38 AM
SirAndy   did i miss something ??? :idea:   Feb 6 2008, 01:38 AM
johannes   did i miss something ??? :idea: Yes, : This...   Feb 6 2008, 01:50 AM
Wanna9146   did i miss something ??? Yes...when are you go...   Feb 6 2008, 04:50 AM
rebelmdot   did i miss something ??? :idea: Andy, can ...   Feb 6 2008, 06:01 AM
davep   did i miss something ??? :idea: I'd add part...   Feb 6 2008, 08:26 AM
Phoenix 914-6GT   :agree:   Feb 6 2008, 01:52 AM
Joe Ricard   Because you don't have to re-drill a 4 hub.   Feb 6 2008, 06:24 AM
Gint   Let this go a few days and make all the edits you ...   Feb 6 2008, 07:24 AM
Richard Casto   Andy, Thanks for the write up. I will probably b...   Feb 6 2008, 07:55 AM
anderssj   Great article! :agree: It would be helpful t...   Feb 6 2008, 08:37 AM
stephenaki   How does this affect the issue with the parking/em...   Feb 6 2008, 09:00 AM
Richard Casto   How does this affect the issue with the parking/e...   Feb 6 2008, 09:40 AM
John   How does this affect the issue with the parking/...   Feb 6 2008, 09:54 AM
stephenaki   I believe that e-brake issues are more of a func...   Feb 6 2008, 10:02 AM
Richard Casto   [quote name='Richard Casto' post='994963' date='F...   Feb 6 2008, 10:26 AM
Wes V   First off, thanks!! Requested additions; ...   Feb 6 2008, 11:26 AM
stephenaki   I think John's point above answers your questio...   Feb 6 2008, 12:57 PM
PRS914-6   Andy, nice write up! I'm going to add a few t...   Feb 6 2008, 09:52 AM
Steve Thacker   Andy, You have outdone yourself again. I wish I w...   Feb 6 2008, 11:45 AM
Krieger914   Andy thanks for your help on this. I did this con...   Feb 7 2008, 10:17 PM
SirAndy   Just a quick update. I have been running my axles ...   Aug 18 2008, 01:42 PM
-JR-   Based on Andy's notes I've assembled these details...   Jun 21 2010, 05:09 PM
jimkelly   so, are these parts still readily available these ...   Jul 5 2017, 06:34 AM
-JR-   Alternate method: *no machine work* I should add ...   Jun 21 2010, 05:48 PM
SirAndy   -944 Turbo CV joints (951 332 901 00) -914 axel s...   Jun 21 2010, 06:16 PM
-JR-   The 944 CVs are too wide to fit on a stock 914-4 ...   Jun 21 2010, 10:24 PM
SirAndy   He may have not used the retaining clip. That's th...   Jun 21 2010, 11:45 PM
SirAndy   Since I have your attention Andy, your post only s...   Jun 22 2010, 12:00 AM
Krieger914   I did exactly what Andy did. Here is the profile ...   Jun 21 2010, 06:37 PM
Krieger914   Shit! I just noticed the date at the bottom. ...   Jun 21 2010, 06:39 PM
jaxdream   There is another twist to the axle / cv delima, ma...   Jun 21 2010, 10:29 PM
SirAndy   the trans side leave un machined if you can't fin...   Jun 21 2010, 11:43 PM
jimkelly   •two 911 ('69 - '73?) hubs, must have same beari...   Jun 22 2010, 05:35 AM
matthepcat   What about using 944 hubs?   Apr 10 2011, 02:28 PM
scotty b   What about using 944 hubs? something else I hav...   Apr 10 2011, 03:03 PM
matthepcat   Well I am going to give it a try. What do I have t...   Apr 10 2011, 03:09 PM
pcar916   Having gone through this recently, The 911, 944 an...   Apr 10 2011, 03:33 PM
matthepcat   Is this inboard spacer a custom piece or available...   Apr 10 2011, 04:13 PM
matthepcat   Update on 944 hubs. They don't work becuase they...   Jun 8 2011, 04:06 PM
SirAndy   Update on 944 hubs. They don't work becuase they ...   Jun 8 2011, 05:29 PM
PeeGreen 914   You can use spacers on the caliper to line them up...   Jun 8 2011, 04:13 PM
matthepcat   You can use spacers on the caliper to line them u...   Jun 8 2011, 05:23 PM
Eric_Shea   Have you tried the 944 rear rotor? Its quite a bi...   Jun 8 2011, 05:47 PM
matthepcat   No I haven't but I assume this would require me to...   Jun 8 2011, 05:50 PM
Eric_Shea   Why? I believe they're within 1mm in diameter.   Jun 8 2011, 05:57 PM
matthepcat   Why? I believe they're within 1mm in diameter. ...   Jun 8 2011, 07:29 PM
Eric_Shea   Ahhhhh.. That, yes, they are vented. For some reas...   Jun 8 2011, 09:37 PM
McMark   If caliper spacers are too janky, then pull your t...   Jun 9 2011, 12:06 AM
PRS914-6   If caliper spacers are too janky, then pull your ...   Jun 9 2011, 06:56 AM
matthepcat   Haha! Well I think swapping hubs would be a ta...   Jun 9 2011, 08:27 AM
jaxdream   Haha! Well I think swapping hubs would be a t...   Jun 9 2011, 08:46 AM
matthepcat   Hey Jack, I have not measured yet (hopefully get ...   Jun 9 2011, 12:17 PM
jaxdream   Yes M rear calipers and converted to alternative e...   Jun 9 2011, 04:12 PM
jimkelly   some cv dim info http://blindchickenracing.com/How...   Nov 18 2011, 07:56 AM
Aaron Cox   Andy, Many thanks for putting this write up toge...   Mar 11 2012, 03:59 PM
matthepcat   I had to use a cv gasket between the inner cv and ...   Mar 12 2012, 01:10 AM
ClayPerrine   Yes, they do require a CV gasket. If you don't pu...   Mar 12 2012, 11:23 AM
Aaron Cox   Yes, they do require a CV gasket. If you don't p...   Mar 12 2012, 11:36 AM
matthepcat   No. Only on the inner CV. Yes, they do require...   Mar 12 2012, 03:25 PM
ClayPerrine   No. Only on the inner CV. [quote name='Aaron Co...   Mar 13 2012, 08:16 AM
Aaron Cox   roger matt. Thanks. BTW - anyone need any 951 stu...   Mar 12 2012, 03:45 PM
davesprinkle   Is this the same Aaron Cox that hasn't posted in e...   Mar 12 2012, 09:14 PM
matthepcat   His stub axles are the type that do not need seals...   Mar 13 2012, 09:15 AM
ClayPerrine   His stub axles are the type that do not need seal...   Mar 13 2012, 12:28 PM
Aaron Cox   what the heck, a few bucks each I'll run them. N...   Mar 13 2012, 12:35 PM
bulitt   "Now, anyone else need 944 stub axle bearing ...   Mar 14 2012, 04:27 AM
chuckc   what the heck, a few bucks each I'll run them. ...   Mar 15 2012, 03:28 PM
zig-n-zag   I could use a pair of those spacers as well, pm se...   Mar 14 2012, 03:04 AM
Aaron Cox   Looks like 6 or so people interested in spacers fo...   Mar 15 2012, 03:36 PM
Aaron Cox   Interesting... I think you can run a 944 (non tur...   Mar 16 2012, 10:39 PM
ClayPerrine   Interesting... I think you can run a 944 (non tu...   Mar 17 2012, 06:59 AM
John   Interesting... I think you can run a 944 (non tu...   Mar 17 2012, 08:03 AM
jaxdream   Interesting... I think you can run a 944 (non tu...   Mar 18 2012, 08:41 AM
Krieger   Interesting... I think you can run a 944 (non tu...   Mar 18 2012, 12:58 PM
DBCooper   Am I too late for a pair of those spacers? There'...   Mar 17 2012, 11:29 AM
Aaron Cox   Sure, ill have my bud crank out another set. Hmm...   Mar 17 2012, 11:17 PM
Travis Neff   Gimme your paypal addy!   Mar 17 2012, 11:36 PM
DBCooper   OK, I still couldn't find a microfiche, but there ...   Mar 18 2012, 12:37 PM
kg6dxn   There is a NOS set of 944 automatic axles on SF Cr...   Mar 18 2012, 03:08 PM
DBCooper   From the part number those are both right side axl...   Mar 19 2012, 09:52 AM
Aaron Cox   Updates - I'll go measure the short 944 axle at lu...   Mar 19 2012, 10:16 AM
rick 918-S   Too late for a set of spacers?   Mar 19 2012, 10:36 AM
Aaron Cox   Hi Rick, I think i can get 8 sets out of this bloc...   Mar 19 2012, 02:04 PM
jaxdream   Hi Rick, I think i can get 8 sets out of this blo...   Mar 19 2012, 03:42 PM
jaxdream   From your measurements , the 944 axle is a bit sho...   Mar 19 2012, 03:41 PM
Aaron Cox   From your measurements , the 944 axle is a bit sh...   Mar 19 2012, 03:54 PM
SirAndy   I highly doubt that 4mm will effect anything short...   Mar 22 2012, 12:10 PM
Aaron Cox   I highly doubt that 4mm will effect anything shor...   Mar 22 2012, 02:16 PM
jaxdream   Aaron , I'd love to get a set of the 944 axles ( t...   Mar 20 2012, 08:25 AM
Aaron Cox   944 Axles i got were from ebay from LA Car Dismant...   Mar 20 2012, 08:39 AM
Aaron Cox   Alright, so my friend got a few sets done in his s...   Mar 22 2012, 09:33 AM
Aaron Cox   Followed Andy's directions step by step, and got a...   May 15 2012, 08:47 AM
Travis Neff   Aaron, I thought you were gonna try using the 944 ...   May 16 2012, 08:03 AM
Aaron Cox   Aaron, I thought you were gonna try using the 944...   May 16 2012, 08:05 AM
Krieger   So I finally got my "Sir Andy" style axl...   May 31 2012, 07:56 PM
Ecke Liebhaber   Thank you to Sir Andy and all who posted. I just ...   Feb 23 2016, 06:49 AM


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