Identity crisis

Discussion in 'Got gears?' started by Groucho70, Jun 21, 2019.

  1. Groucho70

    Groucho70 1970 Work in progress

    Ok I have a 70 Buick skylark and always assumed it had an 8.2 10 bolt rear end under it. Today I crawled under it and I believe I was wrong. After looking at the rear, see attached photo I believe it has a Chevy 12 bolt under it. Am I correct? I was going to look for the axle stamping but have no idea where to look. Can you identify this axle and give me a clue where to look for the stamping? Thanks.

    Attached Files:

    Last edited: Jun 21, 2019
  2. Golden Oldie 65

    Golden Oldie 65 Well-Known Member

    You are correct, it's out of a Chevelle. The axle code in on the front side of the right (passenger) side tube.
  3. TrunkMonkey

    TrunkMonkey Well-Known Member

    Yep 12 bolt GM

    Look on the front of the right (passenger) tube for the codes.

    My '68 was a Canadian build with a 12 bolt open.
  4. Groucho70

    Groucho70 1970 Work in progress

    YES! Thanks
  5. BrianTrick

    BrianTrick Brian Trick

    Just curious. Where was your car built? There seems to be a pattern of some 1970’s coking out of one of the northeast plants with a 12-bolt Chevy. I think it was Framington,Mass.
  6. Groucho70

    Groucho70 1970 Work in progress

    Indeed Brian that's where it was manufactured.
  7. monzaz

    monzaz Jim

    Why would you be upset... you can get parts for the chevy rear...The Buick 8.25 68-70 are a dying breed with fabcraft falling through with gears etc.
  8. Mark Demko

    Mark Demko Well-Known Member

    Good rear yah got:p
    Only thing I don't like about Chevy type rears are the C clip axle retention, it DOES make it easy to work on tho:D
  9. Electra Bob

    Electra Bob Well-Known Member

    FWIW my 1972 Electra out of Wilmington, Delaware has a 12 bolt open rear end.

  10. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD"

    Yes, but your rear is not a 12 bolt Chevy rear, it should be the big car 9 3/8 rear. It has a 12 bolt cover, yes.
    Last edited: Jun 22, 2019
  11. DasRottweiler

    DasRottweiler -BuickAddict-

    Yup, my 70 came from the Framingham plant with a peg leg hiway geared 12 bolt chevy rear. I replaced it with a 71 8.5 posi with 3.42 gears. Still have the 12 bolt, may do something in the future with it. Jim
  12. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD"

    My first Buick, a 1972 Skylark Custom, came with a 12 bolt and 2.56 gears.

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