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Thread: Ultimate 69S factory Sports purpose thread

  1. #51
    Quote Originally Posted by HughH View Post
    I have a list of at least 11 1968 vin cars with 901/7x gearboxes not counting the 1969 GTS's that has them
    Hugh, please post a Kardex or factory document that shows 1968 vin cars with 901/7x gearboxes...

    Jon B.
    Vista, CA

  2. #52
    Senior Member HughH's Avatar
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    just done edited the previous post
    Hugh Hodges
    73 911E
    Melbourne Australia

    Foundation Member #005
    Australian TYP901 Register Inc.

    Early S Registry #776

  3. #53
    Quote Originally Posted by HughH View Post
    One of them - a 901/72 one 9282101 was on the Trans Am car 11810429 (attached). I am not sure if all of the kardexes I have list the type number as a /7x one for the 928 series or not without checking though
    I agree that they are not in the little spec book for 1968 though
    Oooops, you're correct Hugh, I'm sorry :-(

    The 901/75- /79 transmissions were 69 models only, and not the entire 901/70- series as I stated.
    The 901/70- /74 transmissions were 68 models.

    But there were no 68 model 901 transmissions with mag housings.

    Jon B.
    Vista, CA

  4. #54
    Senior Member HughH's Avatar
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    So Jon

    BUT if there were no Mg ones what were these 901/70 to 74 transmissions and why do they appear to be different to, but the same ratios as, the 901/50 to 54 ones ?

    I have at least one 901/71 recorded that seems to be Al so I am not questioning the possibility of Mg (as I had made that assumption based on the 69 year data) but there must be a reason for the two series and a physical difference somewhere.

    also just sent u a PM
    Hugh Hodges
    73 911E
    Melbourne Australia

    Foundation Member #005
    Australian TYP901 Register Inc.

    Early S Registry #776

  5. #55
    Quote Originally Posted by HughH View Post
    BUT if there were no Mg ones what were these 901/70 to 74 transmissions and why do they appear to be different to, but the same rations as, the 901/50 to 54 ones ?
    Hugh, I'll see what info I have on these.
    They may have had "simplified" differentials, which began for some models in 68. Limited-slip differentials were optional, at additional cost.

    Jon B.
    Vista, CA

  6. #56
    Senior Member HughH's Avatar
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    Could it have been that they had "reinforced Nadellas" or could either fit them
    I have a photo of one like that (also has the casting number 901 301 101 0R as seems to be Al) which seems to be a 901/71
    Hugh Hodges
    73 911E
    Melbourne Australia

    Foundation Member #005
    Australian TYP901 Register Inc.

    Early S Registry #776

  7. #57
    Hugh, by 68 only cars with ZF differentials would have had Nadella axles.
    The close-ratio transmissions didn't have ZF diffs unless ordered at additional cost, so a standard 901/71 wouldn't have Nadella flanges.

    Your 68 Kardex with the 901/72 transmission lists a Sperrdifferential as a separate installed option.

    Jon B.
    Vista, CA

  8. #58
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    Hugh

    Below is the Kardex from the 68TR I had.

    Gearbox was aluminium without serial or type numbers stamped on it, at the time I felt that it looked more deliberate than just being worn off i.e. fitted unstamped. It had the small 'z' on the side to indicate the LSD being present and as you know it was fitted with the thicker 'lightweight' Nadellas:
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    Tim

    Early 911S Registry #1167

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