Will posi traction diff. (1964) fit a 1966 Riv?

Discussion in 'Junkyard Jewels' started by Quiet66RIV, May 3, 2011.

  1. Quiet66RIV

    Quiet66RIV Member

    Looking to change to posi traction I found a 1964 diff. - 3.07 ratio in good shape - did the re design in 1966 include a change that would make this not fit? Thanks
     
    Quiet66RIV, May 3, 2011
    #1
  2. CameoInvicta

    CameoInvicta Well-Known Member

    It won't fit. The big car 9 3/8in posi's are as follows; '61-'62, '63-'65, '66-later (I think thru '70).
     
    CameoInvicta, May 3, 2011
    #2
  3. Rivman

    Rivman Senior Ottawa Buick Guy

    Short answer - NO ! '66-'70 are same, and can be swapped. :TU:
     
    Rivman, May 3, 2011
    #3
  4. DaWildcat

    DaWildcat Platinum Level Contributor

    Careful here, not necessarily true. Sometime during the 1966 model year one carrier bearing was increased in diameter, making the early '66 carrier unique and not interchangeable with late '66-'70.

    Devon
     
    DaWildcat, May 3, 2011
    #4
  5. Quiet66RIV

    Quiet66RIV Member

    Thanks - good info as usual!
     
    Quiet66RIV, May 4, 2011
    #5
  6. 64 wildcat conv

    64 wildcat conv Silver Level contributor

    I'd be interested in the diff for my '64 Wildcat if it's available. I'd want the center section only.
     
    64 wildcat conv, May 4, 2011
    #6
  7. Rivman

    Rivman Senior Ottawa Buick Guy

    Thanks for that Devon -forgot that the early '66 is different ! :TU:
     
    Rivman, May 4, 2011
    #7

Share This Page