901 tranny and this ?? ZF limited slip?

[degreeoff1]

Looking at this on ebay and wonder if it will fit my 914?

Very rare early Porsche ZF 901 limited slip differential for '64-'68 aluminum case transmission. Good shape but I have no idea what "slip" it's set at. Comes with matching axle flanges.

The only markings/numbers on the diff are:

4061 004 0041 435 848

Thanks
Josh

[Plavan]

More likely than not it will have to be rebuilt. That can get expensive. I would save your money and get the updated and better Guard Transmission (GT) LSD (40% for steet/some track- 80% for track only). Or get the torque biasing unit that will fit in the aluminum case.
my .02 cents
The GT solution requires you to grab a 914- 901 housing with a 70- 71 nosecone and flanges and you will be set. (you need aluminum billet plate also with a 1969 side cover (70 71 will work too with slight drilling)
You can dump the heavy aluminum case and go mag

[jluetjen]

The "slip" can be adjusted by a combination of re-arranging the clutch stack or the spring pressure. The question is will your half-shafts bolt up to the diff.

[Geary]

The early ('65-'68) model is entirely different from the '69-'74 model (which also fits all 914s). It's more than just a matter of shimming. The early uses a 45mm ID bearing, whereas the later model uses a 50mm ID bearing.