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Thread: 901 trans.

  1. #1

    901 trans.

    Hello All,
    A friend of mine who is new to the Porsche world just bought a 1966 911 with a bad tranny, and I have a 901 5-speed that I had from my 69T. My question is that would he be able to use that in his car?
    Tristan Moore

    1969 911T

  2. #2
    Senior Member
    Join Date
    Oct 2002
    Suffolk, VA


    Yes, it should bolt right up.
    1970 911S Coupe (Burgundrot) (sold)
    1967 911 Coupe (Light Ivory) (mostly gone)
    1966 911 Coupe (Sand Beige) (sold)
    Van Diemen RF99 Formula Continental
    Citation F1000 on the way
    Van Diemen Hayabusa SCCA Formula S (sale pending)
    Other Early 911/912/914

  3. #3
    What about the drive shafts/flanges. There was a change to Lobros at some time.
    Nick Moss - Early 911S #476 - RGruppe #318 -

  4. #4
    He emailed me some photos last night and I could see the Lobro
    writing on the halfshafts. He also sent me the engine #'s...
    901/05, which tells me it was used from March 66 into 67 on the coupe. I can't see any problem of it now he;ll have that nice 5th gear too. BTW- what did the hinged link of the Nadellas look like at the differential? I haven't been able to stick my head under a pre-67 in a while.
    This is a really great site and I can't believe I didn't find it until a month ago.
    Tristan Moore

    1969 911T

  5. #5
    There are two types of flanges used -- one is flat like on the 915, and the other has a small lip around it. The latter takes a _smaller_ dia. CV joint. I'm not sure when the change was made -- maybe when they went to the 911 trans. or pull/push clutch transition. This may not affect you.

    If anyobody has more info on this, I'd like to hear about it.

    I am looking for the smaller type CV joints (and hoping their splines allow them to fit onto the later half-shafts, so I can put a 901 into my '73 911).

  6. #6
    I guess I could have him see what size CV bolts he has....M10x60
    for the 69-71 or the M10x48 for the 71 and later. Or he could measure the flanges to tell me if they are 108mm(early) or 100mm(later type). I hope he doesn't run away because I know he failed math in high school.
    Tristan Moore

    1969 911T

  7. #7

    smaller cv joints

    Just saw this thread. I have an early 68, actually a true early 67 that came with a sporto. The axles and cv joints have been replaced but I have what I think are the original axles/cv joints in the trunk that came when I bought the car. There is rust on them but I don't know if something like that would be of any use to you. I'll check them out for the sizes and let you know.
    Dan S

    '68 911 w/RSR kit (my first)
    '69 Nova street rod
    '03 H-D Heritage Springer

  8. #8
    Thanks much Dan!

    My Email is

  9. #9
    "Senior" Junior Member
    Join Date
    Jan 2004
    Just discovered this post. I am switching from a Nadella to a Lobros and , to do so , am attempting to find a pair of output flanges from a '66-'67 "non-simplified" differential (the non simplified has a 17.5 mm shaft coming out of the differential) that fits a Lobro CV. This axle flange also has a plug and circlip in the flange and the "simplified " does not. I have an output flange for a Lobros from a '68 that is a simplified, and it won't work on a '65 differential. (The Nadella has a washer with a D-shape bore, with two oil grooves on one face, bolted to the differential, with a oil-sealing plug outboard of the bolt). If your output flanges from your '66 fit the description above, and if you don't have a use for them, would you be interested in selling them?? Regards Steve
    '65 911
    '02 M5
    '03 MCS

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