MikeB, do you mean remove the selector and take the back cover off it or are you saying take the back cover off the diff? .
Sorry for the confusion...I'm talking about the "front" cover on the 2-speed selector motor...the one held on with 6 screws and the little tit on it. No need to remove the selector motor, just take that cover off and inspect everything inside.
The "triangle thing" is the selector shaft bottom bearing retainer.
As for the differential, in my earlier post I thought your rear had a removable cover, that's why I said to remove it. But, since you have a welded on cover there's either a plug in the bottom of the housing or the bottom bolts holding the pumpkin in are removed to drain the fluid out of the rear.
Mike B
