Transmission in 70 GS 350

Discussion in 'U-shift em' started by mdh157, Jun 21, 2016.

  1. mdh157

    mdh157 Well-Known Member

    does anyone know what 4 speed tranny was available in the 70 GS 350 cars? (ie, both close and wide or just wide or just close, etc) Also, what the gear ratios were for the 4 speed trannies that were used in 70?

  2. flynbuick

    flynbuick Guest

    I have never seen a 70 Buick factory 4 speed that was not a Muncie M21 close ratio which has a 2.20 first gear ratio. They were equipped 10 spline input shafts through the 70 model year. Post 70 they went to a 26 spline input shaft.

    In the 70 model year, a GS350 4 speed had the following rear gear ratio options:

    3.23 = standard

    3.42 = performance

    3.64 = trailer
  3. mdh157

    mdh157 Well-Known Member

    Thank you.........looking @ a GS 350 this weekend, hopefully I will end up buying it.

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