Stall Test
NOTE: The stall test checks holding ability of the transmission clutches and brakes and the torque converter stator clutchStall Test Procedure
Bring the transmission fluid to normal (hot) operating temperature.
Connect a tachometer to the engine. Position the tachometer so it can be viewed from the drivers seat.
Apply the parking brakes and block the wheels. Apply and hold the service brakes.
On 4WD models, shift the transfer case into two-wheel high position.
Start the engine.
WARNING: Do not allow anyone to stand at the front or rear of the vehicle during the test. Shift the transmission into D range.
Press the accelerator down to the wide open throttle position and note maximum engine rpm. Stall speed should be 2100-to-2400 rpm in D range.
CAUTION: Do not maintain wide open throttle for more than four or five seconds at a time.
Release the throttle and shift the transmission into Neutral. Allow the transmission fluid to cool for 15-20 seconds.
Shift the transmission in Reverse.
Press the accelerator down to the wide open throttle position and note maximum engine rpm. Stall speed should be 2100-to-2400 rpm in Reverse.
Stall Speed Test Analysis
If engine rpm is lower than specified in D and Reverse, check for the following:
Engine output/performance insufficient.
Stator clutch in torque converter not holding if engine speed was 1500 rpm or less.
If stall speed in D range is higher than specified, check for the following:
Line pressure low.
Forward clutch slipping.
No. 2 one-way clutch not holding.
Overdrive one-way clutch not holding.
If stall speed in Reverse was higher than specified, check for the following:
Line pressure low.
Direct clutch slipping.
First/Reverse brake slipping.
Overdrive one-way clutch not holding.
If stall speeds were higher than specified in both D and Reverse, check for the following:
Low fluid level.
Line pressure low.
Overdrive clutch not holding.