When refilling the bevel box from the upper fill hole, I make sure the M3W is on level ground. A successful fill is when the oil starts coming back out of the upper fill hole. The oil level ultimately should be just at the lower edge of the upper fill hole. Obviously if the M3W back end is jacked up and you fill until oil comes out the upper fill hole, then you are going to overfill. Conversely, if the front end is still higher than the rear as when you drained the oil from the lower hole, you will end up under filling the bevel box.
I specifically mention this because the first time I changed the bevel box oil in my garage I didn’t realize my garage floor is higher in the front than the back for water drainage purposes, so I would have underfilled my bevel box a bit.
I’m able to change the bevel box oil with all tires resting on the floor. I don’t jack the vehicle off the ground.
Last edited by Sportster; 24/06/21 09:43 AM.
