Transmission Fluid Level, Checking
Special tools and workshop equipment required
- Refer to TOOLS FOR TRANSMISSION FLUID CHANGE
This procedure contains mandatory replaceable parts. Refer to component overview prior to starting procedure.
Mandatory Replacement Parts
- Seal - Drain Plug
Procedure
Test Conditions
- Transmission not in emergency operation mode.
- Move the vehicle onto a four-column workshop hoist or over a work pit so it is completely level.
- Selector lever in "P".
- The parking brake button is pulled to activate the electro-mechanical parking brake.
- Suction hoses from an exhaust extracting system are connected.
- Engine running at idle.
- The A/C system and the heater are off.
Transmission Fluid Temperature, Reading
- The transmission fluid level changes with the transmission fluid temperature: too low of a transmission fluid temperature leads to overfilling, and too high of a transmission fluid temperature leads to underfilling.
- An incorrect transmission fluid filling impairs the transmission function.
- The transmission fluid temperature must not be higher than 30 °C (86 °F) when starting the procedure. Let the transmission cool down if necessary.
- Test temperature: 35 to 45 °C (95 to 113 °F).
-- Connect the Vehicle Diagnostic Tester -arrow- and identify the vehicle in Guided Functions .
-- Select DSG Transmission .
-- Select Check Fluid Level .
- Specified value at beginning of test: not higher than 30 °C (86 °F), otherwise let the transmission cool down.
Transmission Fluid Level, Checking
-- Remove the noise insulation. Refer to OVERVIEW - NOISE INSULATION .
Risk of injury to the eyes and hands by escaping oil.
- Wear protective eyewear.
- Wear acid-resistant safety gloves.
-- Place the : SMN372500 under the transmission.
-- Remove the check plug -arrow-.
- The collected transmission fluid runs out of the overflow pipe -arrow 2-.
- Some gear oil always leaks out when opening the inspection plug -arrow 1-, regardless of the gear oil level.
Transmission damage due to overfilling.
The correct oil level lays under the level of the overflow pipe.
For this reason the unscrew the overflow pipe two turns for checking and the correct adjustment of the oil level.
-- Loosen the overflow pipe two turns.
- If some transmission fluid still leaks out at a transmission fluid temperature between 35 through 45 °C (95 to 113 °F) (due to additional warming), the transmission fluid level is OK.
- Regardless of the gear oil level, a small wave of fluid comes out of the overflow tube every 30 seconds due to the multi-plate clutch cooling oil pulse. This procedure is irrelevant for checking gear oil level.
- Leaked gear oil must not be reused.
-- If the transmission fluid level is OK, tighten the overflow pipe and then perform a measurement. Refer to Final Procedures below.
Transmission Fluid, Filling
Transmission damage due to overfilling.
The correct oil level lays under the level of the overflow pipe.
For this reason the unscrew the overflow pipe two turns for checking and the correct adjustment of the oil level.
- The overflow pipe must be removed two turns.
-- If no gear oil leaks out at the overflow tube between 35 through 45 °C (95 to 113 °F), fill gear oil as follows.
-- Shake the container before opening.
-- Install the container for DSG® transmission fluid on the : VAS6262A .
- Use the : VAS6262/6 if the container thread does not fit on the : VAS6262A .
-- Install the : VAS6262A into the opening for the check plug hand-tight.
-- Hold the container with the : VAS6262A as high as possible over the dual-clutch transmission and allow the transmission fluid to flow into the dual-clutch transmission.
-- To check if the dual-clutch transmission is sufficiently filled, disconnect the quick-release coupling on the : VAS6262A at regular intervals and seal the hose with a finger or a clean plug.
- The collected transmission fluid runs out of the overflow pipe -arrow 2-.
- Some oil always runs our regardless of transmission fluid level.
- If some transmission fluid still leaks out at a transmission fluid temperature between 35 through 45 °C (95 to 113 °F) (due to additional warming), the transmission fluid level is OK.
- Regardless of the gear oil level, a small wave of fluid comes out of the overflow tube every 30 seconds due to the multi-plate clutch cooling oil pulse. This procedure is irrelevant for checking gear oil level.
- Leaked gear oil must not be reused.
- Monitor the transmission fluid temperature on the Vehicle Diagnostic Tester while filling the transmission fluid. If 45 °C (113 °F) is exceeded, cancel procedure and let transmission cool.
-- If the transmission fluid level is OK, perform the final procedures.
Final Procedures
- Replace the check plug seal -arrow-.
-- Remove the : VAS6262A from the transmission.
-- Tighten the overflow pipe.
-- Tightening the check plug -arrow-.
-- Switch off the ignition and disconnect the diagnostic connector.
Tightening Specifications
- Refer to OVERVIEW - DRAIN AND CHECK PLUGS
- Overview - Noise Insulation. Refer to OVERVIEW - NOISE INSULATION .