Originally Posted by BobsM3Coupe
I don't think a 3/8" ratchet extension would work. It needs a 6 sided tool to R&R the drain and fill plugs. E36 differentials used a 14mm hex tool.
An allen socket then? Now that you mentioned it, my BMW bike used a 14mm allen socket for the tranny drain plug, so it very well could be hex indeed. I just quickly looked at the diff during the 1,200-mile service, and just remember seeing a small 'hole' for the plugs. Will take a closer look next time I raise the car. Thanks for pointing that out.