Table 5-2. Direct Support Troubleshooting - Continued
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
Chock wheels to prevent forward or reverse movement.
Set parking brake.
Start engine and set service brakes.
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° (149° ). Keep close check to prevent
engine cooling system from overheating. If engine over-
heating occurs, place transmission in N (neutral) and run
engine at 1500 to 1800 RPM to cool engine.
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.
TRANSMISSION OVERHEATS IN ALL RANGES
Step 1. Oil cooler lines are restricted (can cause excessive fuel consumption). Remove
restrictions; clean or replace lines. (Refer to vehicle service manual).