- Sep 17, 2018
My "J" transfer case is giving me shifting fits ; )... I know these gear boxes are notorious for this. The shifter does not seem to push the shifting forks hard enough to engage the gears. When I pull the inspection cover and " nudge" the shifting forks with a screwdriver they seem go into place with little effort. I even changed out the shifter with very little improvement. I have been using 80w-90w gear oil. Will the 50w that Ford recommends allow the transfer case to shift better? Perhaps the James Duff " new and improved " shifter is the answer. Or is the gear box just so worn it needs a rebuild ? What do you guys think?