I have a set of 914 trailing arms that I need to figure out. They were used in a high HP application in the past I’m assuming ‘cause they have the welded-on box bracing added to each arm AND had cut-off stainless flexible brake lines. They also have Weltmeister poly bushings AND ZERK fittings for grease added! There was a 5-lug set up installed too - done with non-914 parts. Also, there is only 1 e-brake setup (driver’s side) and a single 911 splash shield (10 vent holes) behind it. For that e-brake to fit, I notice that a little of the left arm was milled away (where the 4 holes are that the wheel bearing sits inside of). These are NOT drilled 914 hubs, or 914 cv’s or axles..but I don’t know what they are exactly. The CV’s measure 108mm and the over all length of the half-shaft assemblies are approx 1” shorter than standard 914. The diameter of the shafts seem to be about 1mm thicker than standard 914 but paint is missing too, so..

I know they’re are several set up using 911/930 items and then 914/6 Specific parts Too. I want to know the specifics of what this is.. btw, the pn# on the 5-lug hubs seem to be 901.331.605.06. Or it could be 951.331.605.08 hard to see! There were no rear calipers or trans output flanges.

901 number is from a 911. 951 is from a 944 Turbo. If they're the 901 version, the 1" shorter axles will eventually screw up the CVs.

So there’s not a proper trans stub/ flange that would make up the extra 1“ ? These are obviously well used.

Well I assume that with me getting 108mm measurements for the CV’s, that I don’t have 944 stuff (they’d be 100mm).

Eric Shea’s 5-lug write up is great but it doesn’t cover every scenario apparently... for instance his #2 option for the rears.. discusses 911 hubs and 914/6 stub axles. That can’t be my situation because 914/6 stubs mate to stock 914 CV’s. My CV’s are 108mm.

So my situation is leaning towards 911 hubs and 911 or 930 Stubs, CVs & shafts. Eric’s write up does not cover this. Does anyone know the diameter of 911 and 930 shafts?


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I'm no expert... I recently did 69-73 911 hubs, stub axles, and flanges. Bought sway away 914 length axles, and modded the swingarms for a 911 parking brake. I had to grind some of the steel off to make it fit. It sounds like you have the same parts except the axles.
I assume your stubs take 4 10mm bolts with 2 10mm pins?

..and with the CVs being 108mm AND 4-bolt 2-pin, that makes them 911 rather than 930/G50 (which is 6-bolt 0-pin). OK, slowly figuring it out.



What's the reason for the single 911 e-brake ? Is it the only way when using a 911 hub.. 914 rear calipers do still fit I believe.

Sounds like all 911 stuff just cant tell if it's early or later (pre 72 etc). I just finished this myself from scrounged/left over parts. 911 axels are about 26mm in diameter and they are a tad over 1" shorter than 914 axels. There are adapters to make up the 1" that would bolt to your transmission output flange, but that is also dependent on what flange you have on the transmission (914 or 911).

I had some adapters that I thought I could use but they ended up being for 100mm flanges rather than the 108mm 911 ones that I put in the 901 transmission.

If you are using this setup and not using a 915 transmission 1) source the correct 108mm output flange for the 901 transmission (coarse spline and correct diameter, etc.) 2) go the SwayAway 930 axel route for the 20 1/4" length (SKU 2420). You can then simply put on the 28 spline 911 CV's and bolt directly in.

There are some cv's (69-71 and 930's) that are actually around 1/4" thicker (deeper) than '72 and later but this does not effect anything when using the longer axels, just the bolt length.

As for the single parking brake that was probably for minimum convenience or at least minimum to make it street legal (safety inspection?). If a real racer most would get rid of the park brake all together or don't put one on. (damn that 2lbs or weight )

Couple of pics of axel set-up (first one shows 911 axel as well)
Click to view attachment
Click to view attachment