TRANSMISSION -714670039

TM 5-2420-224-34

Table 2-1. Troubleshooting (Cont)

Malfunction

Test or Inspection

Corrective Action

TRANSMISSION

TRANSMISSION WILL NOT OPERATE IN ANY FORWARD OR REVERSE GEAR.

NOTE

Vehicle Master disconnect switch must be on, ignition switch set to on and clutch pedal

fully depressed. Failure to do so will cause erroneous results.

Refer to wiring diagram for all electrical troubleshooting steps.

Step 1.

Check for air supply between overflow valve and air shift solenoid.

NOTE

Overflow valve is located above the muffler and attached to the frame cross member.

If air supply is present at air shift solenoid, go to step 2.

If air supply is not present at air shift solenoid, adjust/replace

overflow valve (refer to TM 5-2420-224-20-2, page 4-304).

Step 2.

Check air shift solenoid as follows:

a. Disconnect fitting (1) from air shift solenoid valve (2).

b. Have assistant turn on vehicle MASTER disconnect switch and ignition switch

and depress clutch completely.

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