HOW TO: Convert to real 5-lug in the rear using 944 CVs Options

[SirAndy]

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

[-JR-]

Alternate method: *no machine work*

I should add that I found this method burried on another website and I haven't confirmed it's validity but here goes...

-Rear hub 1969 --> 1973 "901 331 065 09" 911 T/E/S *Not Carrera"
-Audi 5000 front wheel bearings, three bearings internally compaired to 999-053-021-00 dual bearing for 914's and 911's.
-944 Turbo stub axel (951 332 235 35) mates with 911 hub
-944 Turbo CV joints (951 332 901 00)
-914 axel shaft
-911S,SC / 912E transmission flange (923 332 209 02) 1974 --> 1983

The original author claimed no machining / no spacers / 901 or 915 and the use of 100MM CV joints.

I am not able to find a part number for the Audi wheel bearing. So far my searches indicate that the Porsche bearing is the same for the Audi 5000. But from my Audi days I do seem to recall that the 5000 did have a better bearing option.

[SirAndy]

-944 Turbo CV joints (951 332 901 00)
-914 axel shaft

The 944 CVs are too wide to fit on a stock 914-4 axle shaft.

That is why i had mine machined to accept the 944 CVs.
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[-JR-]

The 944 CVs are too wide to fit on a stock 914-4 axle shaft.

That is why i had mine machined to accept the 944 CVs.

Thanks Andy! Like I said, the author claimed no machine work nessasary. He may have not used the retaining clip. My Audi Coupe never used retaining clips on it's CVs.

Since I have your attention Andy, your post only says 944 100mm CVs. Did you use the turbo ones or the standard CV joints?

BTW - Finally brought my 3.6 home last week. (IMG:style_emoticons/default/cheer.gif) Bought it almost 2 years ago!

[SirAndy]

He may have not used the retaining clip.

That's the only way that would work.

As long as you never jack up the rear of the car, that might work.

Otherwise, the axle shaft will slide right out of the CV ...
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