2. Remove the front protective tray #2.
3. Remove the test hole plug with gasket.
Gearboxes C66M-R, C66MX-R
Gearboxes D66M-R, D66MX-R
Note: replace the part with a new one after each removal.
4. Verify that the transmission oil level reaches the lower edge of the check hole. If the oil level is below the minimum (see picture), add gear oil to the gearbox.
5. Install a new gasket on the check hole plug and tighten it to 39-59 Nm.
6. Install front skid plate #2.