What 4 speed trans comes in a 71 GS 350 car?

Discussion in 'U-shift em' started by Jrcarz, Jul 7, 2015.

  1. Jrcarz

    Jrcarz Well-Known Member

  2. gsgnnut

    gsgnnut Well-Known Member

    M-21 or m-22 i believe. Mine has the fine spline input shaft and had a posi. Been told its a m-21
  3. gstewart

    gstewart Well-Known Member

    not an M22 but an M21. think the M22 was chevrolet only.
  4. knucklebusted

    knucklebusted Well-Known Member

    My 71 350 4 speed is a 3.08:1 posi and M21 close ratio. It has the large tail shaft/drive shaft yoke.
  5. Buickcub

    Buickcub Well-Known Member

  6. agetnt9

    agetnt9 Agetnt9 (Dan)

    Both my 72s came with m21 26-32 big tail. I think the 455 was the same:Do No:

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