ISUZU Amigo/Pick-ups/Rodeo/Trooper 1981-1996




All of the manual transmissions in the Isuzu trucks and Sport Utility vehicles are designed with the shifter level mounted directly to the top of the transmission case. The linkage or shifter handle is non-adjustable. If problems with shifting arise, inspect the clutch or have the internal mechanisms of the transmission inspected by a reputable transmission technician.


MSG-Type Transmission

The clutch switch used on the MSG-type transmissions cannot be adjusted. If the clutch switch is not functioning normally, first adjust the clutch pedal height and free-play, as described later in this section. If, after adjusting the clutch pedal, the clutch switch still does not function correctly, perform the clutch switch test in the clutch switch adjustment procedure for the NV1500 transmission.

MUA-Type and T5R Transmissions

To adjust the clutch switch, please refer to the clutch pedal height and free-play procedure later in this section. The clutch pedal free-play and height and the clutch switch adjustment should all be performed together as 1 procedure. If you want to test the clutch switch for a defect, refer to the clutch switch adjustment procedure for the NV1500 transmission.

NV1500 Transmission

See Figure 1

The clutch switch used on the 1996 Hombre model (NV1500 transmission) cannot be adjusted. If the clutch switch is not functioning normally, inspect the switch for a defect as follows:

Even if the clutch switch in your Isuzu trucks does not appear like the one in Fig. 1, the test is still valid for it.

  1. Disconnect the negative battery.
  3. Detach the clutch switch connector from the wiring harness.
  5. Attach an ohmmeter to the 2 terminals of the clutch switch connector. It does not matter which terminals the positive and negative ohmmeter leads are attached to, just as long as they are attached to different ones (i.e. do not attach both leads to the same terminal).

Click image to see an enlarged view

Fig. Fig. 1: Test the clutch switch for continuity in both the ON and OFF position-continuity should only be present when ON

  1. Measure for continuity in the switch: none should be exhibited.
  3. Depress the clutch pedal completely to the floor and read the ohmmeter once again for continuity. With the clutch pedal depressed, continuity should exist. If continuity is not present, the problem is one of the following:
    1. The clutch switch is bad.
    3. The clutch pedal is bent or otherwise defective so it does not correctly depress the clutch switch plunger. Note that this occurring is fairly rare.

  5. To test for either of these problems, remove the clutch switch from the pedal assembly. Perform the same continuity test on the switch, only this time use your finger to manually depress the clutch switch plunger. If continuity is still not evident, the switch is faulty and should be replaced with a new one. Otherwise the problem lies with the clutch pedal assembly. Inspect the assembly for any cracks, irregular bends, worn bushings or excessive play. The clutch pedal assembly may need replacement.