The test determines the maximum speed at which the engine can rotate the torque converter if its turbine is held stationary. Make sure the engine is properly adjusted and warm it and the transmission up to operating temperature (see chapter "Engine adjustment").
CAUTION: No one should be in front of or behind the vehicle while performing this check.
1. Attach an accurate tachometer to the engine.
2. Place brake chocks under the front and rear wheels, apply the handbrake and press the brake pedal.
3. Start the engine and move the selector lever to position "D".
4. While pressing the brake firmly, fully depress the accelerator pedal and note the tachometer reading. Release the pedal.
ATTENTION: The duration of the test in the braked state should not exceed 10 seconds, otherwise it will lead to oil overheating.
5. The tachometer readings should be 2390-2640 rpm (for the "K" torque converter on models with a 1.8 L engine) and 2340-2590 rpm (for the "M" torque converter on models with a 1.5 or 1.6 L engine). If the engine speed with the transmission braked does not fit within these limits, it is possible to assume a defective torque converter, internal transmission components, or insufficient engine power.
NOTE: The torque converter identification mark (letter) is stamped on one of its mounting protrusions (figure K:7).
[The original material is available on the portal: VWManual.ru]
6. If the engine speed is less than the above, this indicates one of the following defects:
- a) If the engine speed is 200 rpm or less below the required speed, this most likely means that the engine has insufficient power due to improper adjustment or other, more serious reasons.
- b) If the engine speed is more than 200 rpm lower than required, this indicates a faulty torque converter - slippage of the stator freewheel clutch.
7. If the engine speed is higher than specified above, this indicates one of the following defects:
- a) Not enough oil is supplied to the torque converter;
- b) The brake band in the transmission is slipping;
- c) The wrong type of torque converter is installed.
8. Remove the transmission and replace the torque converter if defective. If you suspect an internal transmission defect, consult a VW representative.
NOTE: When checking under braking conditions, remember that the rated engine speed decreases by 125 rpm for every 1000 m increase in altitude above sea level.
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