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Thread: 901 Synchros

  1. #1

    901 Synchros

    So I have a simple question. At least I hope it's simple. I want to rebuild my 901 transmission and was going to try to order sychros for it. Looking at the PET catalog, it appears that all 5 synchros are the same size. Is that correct? I'm being told from some local guys that the 1st gear synchro is larger. Can anyone confirm?

    Thanks

    Chris

  2. #2
    Quote Originally Posted by chris belyea View Post
    Looking at the PET catalog, it appears that all 5 synchros are the same size. Is that correct? I'm being told from some local guys that the 1st gear synchro is larger...
    Chris, a 901 transmission uses the same synchro ring for all gears. A 915 transmission uses larger synchro rings in 1st and 2nd.

    Jon B.
    Vista, CA

  3. #3
    Thanks Jon. Do you have a recommendation on brands? I see OEM and Rauch & Spiegel. Is one better or worse than the other?

    Chris

  4. #4
    Senior Member
    Join Date
    Oct 2010
    Location
    Southern Ca.
    Posts
    498
    Synchro rings are just part of the equation , what about the sliders ? A 901 with good used synchros and new slider rings will shift really well . New style stop blocks , energizers and brake bands make a difference also .

  5. #5
    If you open up your 901, you will want to swap out all the bearings too.
    James Hurst #1638
    R Gruppe #514
    911T rebuilt to 2.2S

  6. #6
    Thanks all for the advice.

    Chris

  7. #7
    Does anyone have recent experience on what someone would expect to put out ($$$) for the entire parts list for a complete rebuild? bearings, synchros, slider rings, stop blocks, energizers and brake bands? Seals, etc....????

  8. #8
    Senior Member
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    Aug 2016
    Location
    NE Ohio
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