1964 BOP Axle - R&P Options

Discussion in 'Got gears?' started by Tim_D, Aug 26, 2019.

  1. Tim_D

    Tim_D Active Member

    Like the title says, I have a BOP 8.2" 10-bolt under my '64 Special. It currently has 3.08 gears. I'm seeing confusing data with regards to availability of a deeper (3.36-3.55) gear set availability. I see some data that suggests I need a carrier that originally came with at least a 3.23 gear set, I've seen others that claim to fit as is...
    What's the real scoop? I'm open to any vendor, just want to find something that will work!
  2. jmos4

    jmos4 Well-Known Member


    I believe your correct, my understanding is 2.78-3.23 is a 2 series and 3.36-430 is a 3 series there might be a 1 series for 2.41-2.56 but not sure

    3.23 is stock ratio for a stick 300 or V6

    I'm running 3.55 with 245/60r14 and 80mph is 4000rpm, 70mph is 3500rpm

  3. christy staunto

    christy staunto Well-Known Member

    I got a 323 possi from Jim Monazz here on the board, Ten plus years ago and still going strong,Check him out, Real nice guy also
  4. Bill Nuttle

    Bill Nuttle Well-Known Member

    I had a 3.55 with an Eaton post built earlier this year. Love it. My axle came out of a 1964 Cutlass.
  5. monzaz

    monzaz Jim

    CORRECT DATA for all
    2.56 - 2.78 is 2 series (factory only no aftermarket carriers avaialble)
    2.93 3.08 3.23 is 3 series (Auburn unit only aftermarket)
    3.36 3.55 3.73 3.90 4.10 4.33 4.56 4.88 5.13 and ^ 4 series carrier (eaton & Auburn units available)

    That will do it for the 1964- 1967 Buick and Pontiac rears. (Olds used the B or the P in these years till they made the 12 bolt Olds rear which had the 12 boolt cover and 10 bolt ring. 67-70 era )

    JD Race
  6. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD"

    You can order everything you need out of the Jegs or Sumitt catalog. Or you can get it from Monzaz.
  7. Tim_D

    Tim_D Active Member

    So based on the info from Jim (thanks), if I want 3.55 gears, I need a 4-series carrier. That seems somewhat daunting - especially since I need the narrower 64-67 unit.

    I'm not too concerned about revs, since I have a turbo V6 GN engine/trans in my car (which means 0.67 overdrive in the 2004R). With my current setup, I'm turning a little over 1900 rpm at 70 mph.

    Another option is a Chevy carrier, although I certainly prefer bolt-in axles vs. c-clip.

    I suppose I'll have to keep my eyes open for a usable core.
  8. telriv

    telriv Well-Known Member

    Most newer rears, including the 8.5 are ONLY 1/2" wider on each side for a total of ONE INCH. Whats the big deal????
  9. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD"

    65Larkin likes this.
  10. monzaz

    monzaz Jim

    I can beat that eaton price by 75.00 - Jim
    65Larkin likes this.
  11. 65Larkin

    65Larkin Well-Known Member

    I might be interested in that PM sent
  12. BrianTrick

    BrianTrick Brian Trick

    Can you get that with a different brand of gears?
  13. monzaz

    monzaz Jim

    I always use Yukon gears.... Just do not want to spend time playing around tweaking a inferior gear set any more at 50+ years old...been doing this for 30 years now and I am even thinning out the used herd of rears. I build the Moser housings 12 bolt and just almost use the same shimming every time...It is nice less labor more money in the pocket. :) Jim
    65Larkin likes this.
  14. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD"

    I have Yukon gears in my rear. Very quiet and durable so far.
    65Larkin likes this.
  15. BrianTrick

    BrianTrick Brian Trick

    I was referring to those Richmond Elites. I’d rather have something else.
  16. monzaz

    monzaz Jim

    Yep, I understand exactly what you meant. :)
  17. monzaz

    monzaz Jim

    That is how they great that cheap low price....
  18. BrianTrick

    BrianTrick Brian Trick

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