Drive shaft

Discussion in 'Got gears?' started by agetnt9, Jul 26, 2018.

  1. agetnt9

    agetnt9 Agetnt9 (Dan)

    Got a 72 GS 4 speed with 350. Now the ass. Man says shaft pt# 7810904 with M20 trans ===
    Has a Red strip 54.429" long C/L to C/L My cars are 53.75" long. with M21
    The yokes are 4 speed # 789762 and TH 400 auto is # 7801551 ..
    I thought the 4 spd and 400 yokes were the same.
    they did not come with M20 did they?
    Could i get some feed back on what every one has for drive train ?
    Engine -
    Trans --
    Rear ---
    That would help every one i think.
     
  2. 87GN_70GS

    87GN_70GS Well-Known Member

    The 71 up fine spline trans is slightly longer than the 70, and also has the same yoke as TH400. 70 coarse spline trans does not.
     
  3. agetnt9

    agetnt9 Agetnt9 (Dan)

    66-68 manual and ST 300 take the 27 teeth yoke. 69 and up all different.
     
  4. BrianTrick

    BrianTrick Brian Trick

    The 71-74 Muncie 4-speeds have the larger output,and use the same yoke as the TH400.
     
  5. agetnt9

    agetnt9 Agetnt9 (Dan)

    72 parts manual The yokes are 4 speed # 789762 and TH 400 auto is # 7801551 ..
    I thought they were the same and still do. 71-74
     
  6. BrianTrick

    BrianTrick Brian Trick

    The difference in the yokes might be the length of the barrel itself.
     

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