Contents: The braking speed is higher than…⇓ The braking speed is higher than…⇓ The braking speed is lower than…⇓
The test consists of determining the critical engine speed with the throttle fully open and the automatic transmission lever in position "D" or "R".
The operation of the clutch, torque converter, low gear and reverse brake is checked.
Caution: Make sure there is no one in front or behind the vehicle during this test.
1. Check the fluid level in the automatic transmission. It should have a normal temperature of 70-80°C.
The engine coolant should also have its normal temperature of 80-95°C.
2. Place wedges under the rear wheels.
3. Connect the engine tachometer.
4. Apply the brakes - parking and service.
5. Start the engine.
6. With the gearshift lever in position "D", fully depress the accelerator pedal to determine the maximum engine speed. Do not keep the throttle open longer than necessary for this purpose and do not exceed 5 seconds at a time. Braking speed: 2200-2500 rpm.
7. Perform the same test with the gear lever in position "R".
The braking speed is higher than specified in the technical specifications in position "D".
If this is the case, then most likely the rear or overrunning clutch of the torque converter in the automatic transmission is slipping.
The braking speed is higher than specified in the technical specifications in the "R" position.
If the braking speed is higher than the specifications in this mode, the front clutch of the automatic transmission or the low-speed reverse gear brake slips.
The braking speed is lower than specified in TU "D" and "K".
If the speed is lower than the specification, it can be assumed that the insufficient engine output power or a faulty torque converter are responsible for this. Check the engine for misfires, correct ignition timing, valve clearances, etc. If all these parameters are beyond suspicion, then the torque converter itself is faulty.