There are 11 choices

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Automatic Transmission
- 4x2
  - TH400
  - TH700
    - diesel
    - gasoline
      - ECM equipped
      - Without ECM equipped
- 4x4
  - TH400
    - diesel
    - gasoline
  - TH700
    - diesel
    - gasoline
Manual Transmission
- (4 speed)
  - integral clutch housing
  - separate clutch housing
    - 4x2
    - 4x4

Transmission Assembly for 1988 GMC R1500 Suburban

Fits: Automatic Transmission 4x4 TH700 gasoline (change)

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