There are 12 choices

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Automatic Transmission
- TH350
  - 6" extension
    - multi-fit case
    - Without multi-fit case
  - 9" extension
- TH400
  - bolt-on yoke
  - Without bolt-on yoke
Manual Transmission
- 3 speed
  - side cover (Saginaw manufactured)
  - top cover (Tremec manufactured)
- 4 speed

Transmission Assembly for 1980 GMC G3500

Fits: Manual Transmission 4 speed (change)

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