Troubleshooting Malfunctions (Cont)
Table 2-3. Troubleshooting (Cont)
Test or Inspection
Perform transmission stall test when power package (engine and transmission) is not performing
satisfactorily. Purpose of test is to find out if transmission or engine is defective.
Apply both parking and service brakes when performing transmission stall test. Block
wheels to prevent forward or reverse movement. In the event of brake failure and/or
improper blocking of wheels, vehicle can suddenly move forward or backward and
may cause personal injury or death.
Chock wheels to prevent forward or reverse movement.
Set parking brake (TM 9-2320-279-10).
Start engine and set service brakes.
Put transfer case in high position, and set transmission to 2 position.
Do not maintain stall condition longer than 30 seconds. Transmission oil can become
overheated and damage to transmission may occur. Do not allow temperature to
exceed 300 °F (140 °C). Keep close check to prevent engine cooling system from
Accelerate engine to full throttle. Write down maximum rpm engine will run (torque converter stall
speed). Stall speed should be 2100 rpm ( ± 150 rpm).
If high engine speed is noted, go to MALFUNCTION 9.
If engine speed is low, go to MALFUNCTION 10.