Rear axle ID

Discussion in 'Got gears?' started by Bob Lorenz Jr., Jul 1, 2022.

  1. Bob Lorenz Jr.

    Bob Lorenz Jr. Well-Known Member

    Does anyone know what this axle code is for? SA B 161 2
    Looks like an 8.5 by the yoke

  2. BrianTrick

    BrianTrick Brian Trick

    SA is a 2:73 non-posi that came in a 71-72 Olds Cutlass. Same rear as Buick,but just used a different code. Yes,it is an 8.5” 10-bolt.
  3. Bob Lorenz Jr.

    Bob Lorenz Jr. Well-Known Member

    Thanks Brian
    Looks like a Buick, but it wasn't a Buick code. Was in a 70 GS 455. Currently has a 3.42 posi installed. Wanted to make sure it wasn't something rare
    that someone might need for a restoration before I use it
    Also, I noticed you have some Oldsmobiles. I have a 10/12 bolt Olds rear that has been sitting under my bench for 20+ years
    don't remember the details about gears etc., but I can look if you could use it

  4. BrianTrick

    BrianTrick Brian Trick

    The 71-72 Cutlass/442’s that were NOT built in Lansing Michigan got the same 8.5” casting as the 71-72 Skylark/GS. They even came with the trishield drums,like the Buicks.

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