Dear Dennis, When you say say stock OD, do you mean a dealer installed Warn overdrive, like this?.
http://www.public.asu.edu/~grover/willys/od.html Or do you mean you have a 2WD pickup with the factory overdrive, which is an extension of the T90? (Sorry, no picture) Or are we talking about what’s behind door number three, the Borg-Warner/Rancho overdrive on the transfer case like on Merl’s M38A1? This is the kind that requires the rear driveshaft be shortened and can only be used in 2wd: http://home.off-road.com/~merls_garage/mdpics/md030.jpg The only type with which I am familiar is the Warn overdrive. There is a bearing, #5 in this picture, which could be at fault: http://www.public.asu.edu/~grover/willys/graphics/warnod06.jpg That bearing is stationary when shifted into overdrive. It only spins when in normal range. It is probably the first thing to get damaged if the oil level drops too low. It could also be the aft synchro ring, which has no relative motion when in the overdrive position. (See the pair of synchro rings #2 in that same picture, the ring toward the left of the pa
