printable version

Testing of teamwork of an automatic transmission and the engine for the motionless car (stall test)

The test is performed to determine the maximum engine speed when the selector lever is in position D or R, and check the effect of the torque converter, starter and one-way clutch, and the characteristics of the clutches and brakes.

When the test no one should stand in front of and behind the car.

1. Before testing, check the level of all fluids and, if necessary, bring them to normal.

• The temperature of the transmission fluid should be in the range 80-100 ?� C.
• Coolant Temperature 80-100 ?� C.

2. Install the wedge Chock the rear wheels.
3. Apply the parking brake and depress the brake pedal.
4. Start the engine.
5. Move the selector lever to position D. The left foot press against the stop a brake pedal and the right foot gently press the accelerator pedal. When the speed of the crankshaft of the engine is no longer increasing, read tachometer readings and release the accelerator pedal.

To avoid damaging the transmission test was performed for 8 seconds. If you want to spend more than one test with the engine running, move the selector lever to position N and a place to work on the engine idle speed to cool the transmission fluid. Running the engine at idle speed transmission fluid cools and prevents deterioration of its properties.

The engine speed of the engine during testing of teamwork of an automatic transmission and the engine for the motionless car (stall test): 2000-2900 ^min -1

(6) Similarly to Test the R position of the selector lever.

The engine speed of the engine during testing of teamwork of an automatic transmission and the engine for the motionless car (stall test): 2000-2900 ^min -1

a. The frequency of engine speed above specifications in D and R.

• Low pressure in the pipeline.
• Slippage brake bands in low gear and reverse gear.

b. The frequency of engine speed above specification only in the position D.

• Slip clutch downshift.

c. If the speed of the engine crankshaft above specification only in the position R.

• Slip clutch backing.

d. If the speed of the engine crankshaft lower sheets in position D and R.

• Damage to the torque converter.
• Lack of engine power