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 Used Oil Collection and Extraction Unit: 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.
There are different versions of the overflow pipe.
Transmission damage can result from over or under filling.
Check which overflow pipe is installed.
Transmission with beige overflow pipe:
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.
-- Check the overflow pipe is seated correctly.
-- Loosen the overflow pipe two turns.
Transmission with red overflow pipe:
-- Removal to check the fluid level is not necessary.
Continuation for all:
- If some transmission fluid still leaks out at a transmission fluid temperature between 35 and 45 °C (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 the transmission fluid level.
- Leaked gear oil must not be reused.
-- If necessary, add transmission fluid. Refer to Transmission Fluid, Filling .
-- If the transmission fluid level is OK, tighten the overflow pipe and then perform a measurement. Refer to Final Procedures .