GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Isuzu 🢒 1999 🢒 Isuzu MD Steel Tilt (F Model) 🢒 Transmission/Transaxle 🢒 Manual Transmission - Medium Duty 🢒 Transmission Replacement

Removal Procedure
  1. Block all of the vehicle wheels.
  2. Remove the transmission oil from the transmission. Refer to Transmission Oil Changing .
  3. Remove the propeller shaft. Refer to the following procedures:
    4. •  One-Piece Propeller Shaft Replacement
    •  Two-Piece Propeller Shaft Replacement
    •  Three-Piece Propeller Shaft Replacement
  4. Remove the clutch slave cylinder. Refer to Clutch in Transmission.
  5. Remove the power take off drive shaft, if installed.
  6. Remove the parking brake cable and bracket. Refer to Parking Brake Cable Replacement.
  7. Remove the shift and select cable at the transmission. Refer to Shift Cable Replacement .
  8. Remove the wiring harness connectors and the wiring harness.
  9. Remove the speed sensor and seal from the speedometer driven gear bushing.

    10. Important: 

       • Support the transmission with a cradle type jack prior to removing the transmission mounting bolts.
       • If a cradle type jack is not used, chain the transmission to the jack that you use.
       • Pull the transmission straight back on the clutch splines in order to avoid damage to the clutch system.
       • Do not let the transmission hang on the clutch splines when removing the transmission from the engine.


    Object Number: 204790 Size: SH
  10. Remove the bolts that secure the transmission and cable brackets to the engine.

Installation Procedure

    Important: 

       • Support the transmission with a cradle type jack prior to lifting the transmission.
       • Do not let the transmission hang on the clutch splines when removing the transmission from the engine.

  1. Align the transmission with the engine.
  2. Align the direct gear shaft splines with the clutch hub splines.

    3. Object Number: 204790 Size: SH
  3. Install the bolts that secure the transmission and the cable brackets to the engine.

    4. Tighten
    Tighten the transmission and cable bracket bolts to 39 N·m (29 lb ft).

  4. Install the speed sensor and seal to the speedometer driven gear bushing.
  5. Install the wiring harness connectors and the wiring harness.
  6. Install the shift and select cable at the transmission. Refer to Shift Cable Replacement .
  7. Install the parking brake cable and bracket. Refer to Parking Brake Cable Replacement in Parking Brake.
  8. Install the power take off drive shaft, if necessary.
  9. Install the clutch slave cylinder. Refer to Clutch in Transmission.
  10. Install the propeller shaft. Refer to the following procedures:
    11. •  One-Piece Propeller Shaft Replacement
    •  Two-Piece Propeller Shaft Replacement
    •  Three-Piece Propeller Shaft Replacement
  11. Fill the transmission with transmission oil. Refer to Transmission Oil Changing .
  12. Start the engine and check for the transmission operation.