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Thread: WTB: 7:31 Ring and Pinion

  1. #1

    WTB: 7:31 Ring and Pinion

    Hello

    Looking for a matched set 7:31 Ring & Pinion for a 902/0 translaxe.

    Thanks
    François

  2. #2
    Anybody has a nice set ?
    Thanks in advance
    François

  3. #3
    Senior Member 2.5MFI's Avatar
    Join Date
    Sep 2006
    Location
    Bend, Oregon
    Posts
    338
    I have a NOS 8:31 for the 65 to 71 transaxles. Eight teeth pinion is stronger than the 7, and final drive ratio just a hair taller. Let me know if you're interested.
    Mark Jung
    MFI Werks
    Early 911S Registry #972
    Carrera T w/LWB, MT, RWS, PCCB
    72 T 66 x 100 MFI Twin Plug Coupe
    R Gruppe #686

  4. #4
    Thanks Mark but looking for a 7:31 rp for the time being

  5. #5
    Senior Member
    Join Date
    Oct 2008
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    Burford, ON, Canada
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    Where are you located?
    Porsche Historian, contact for Kardex
    Addicted since 1975, ESR mbr# 2200 to 2019 03
    Researching Paint codes and Engine Build numbers

  6. #6
    Quote Originally Posted by davep View Post
    Where are you located?
    In France.

  7. #7
    Quote Originally Posted by François View Post
    Looking for a matched set 7:31 Ring & Pinion for a 902/0 translaxe.
    Any ring & pinion from a 914, or from any 65-71 911 or 912 except a Sportomatic will work in your 902/0 transmission.
    Just be aware that pinions from 70> had different setting values.

    Jon B.
    Vista, CA

  8. #8
    Quote Originally Posted by 2.5MFI View Post
    I have a NOS 8:31 for the 65 to 71 transaxles...
    Mark, I think you have an 8:35, not 8:31 ring & pinion.

    Jon B.
    Vista, CA

  9. #9
    Senior Member 2.5MFI's Avatar
    Join Date
    Sep 2006
    Location
    Bend, Oregon
    Posts
    338
    Yes I remember the pinion count, forgot the ring gear count. Thanks Jon.
    Mark Jung
    MFI Werks
    Early 911S Registry #972
    Carrera T w/LWB, MT, RWS, PCCB
    72 T 66 x 100 MFI Twin Plug Coupe
    R Gruppe #686

  10. #10
    Quote Originally Posted by Jon B View Post
    Any ring & pinion from a 914, or from any 65-71 911 or 912 except a Sportomatic will work in your 902/0 transmission.
    Just be aware that pinions from 70> had different setting values.

    Jon B.
    Vista, CA
    Thanks Jon for the advice !

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