I replaced my differential yoke for one that fit a 1350 U-joint this winter. It's leaked ever since. When I ordered the new yoke from Moser they said just take the pinion housing out, install the new yoke and tighten the nut down to 250 ft. lbs torque. Moser claimed it was no big deal.
The oil leak believe it or not is coming through the yoke splines and around the nut. The pinion seal is good.
When I replaced the differential yoke I held the yoke in a vice and used a breaker bar with water pipe extension on it to tighten it down until I felt a small drag on the rotation of the pinion. Since I was coming off the floor to get that done with the breaker bar and water pipe extension I figured I was in the ball park. BUT, today when I took it out the nut broke loose with a small amount of effort using just the breaker bar. In other words the nut was loose. Now, Moser wants me to take the whole center section out and bring it to them to inspect the pinion housing and apply the right amount of torque on the nut. That seems weird since the only thing wrong is the pinion housing and they don't use a crush but a solid spacer on them.
One of the things that concerns me is a hole in the housing (before the O-ring seal that allows oil to lube the bearings. Moser claims it doesn't matter where this hole in located (top, bottom, or side) when installed in the center section. To me, this is probably where the oil is coming from that is leaking through the splines of the yoke. Where this hole is located should be relevant.
My plans are to find someone with a 250 ft. lb torque wrench and put it back together since the pinion seal is good. Have you guys had any experience that might help me here.
