destinbeachman
New Member
- Joined
- Nov 18, 2014
- Messages
- 11
I have rebuilt quite a few differentials over the years, but never a Ford 9". With the case side adjusters and the pinion carrier, it should be the easiest, but I've run into something.
Rear is a '77, with an ARB and 4.88s. A while back I broke my transfer case output, and destroyed the driveshaft. I upgrade the output and replaced the driveshaft with another from TW. Shortly thereafter, I started to notice a vibration from the rear. I replaced u-joints, of course. When the transfer case output broke, the driveshaft was completely ruined, with all the yokes egged, and it even ripped the bolts out of the diff yoke. Thinking I possibly hurt the yoke, I got a new one. Here's what I found-
When removing the yoke, i found the pinion nut to be suspiciously lacking in torque. So, okay, I'm pretty sure I banged the rear hard enough to lose the preload. I decided to go through the whole diff to make sure it was right. Ordered a complete kit from WH. Tore the rear down and cleaned it up.
Here is my problem-I installed the inner pinion bearing and started to assemble it into the barrier so I could set up the solid spacers, but the outer pinion bearing is tight on the pinion. This bearing is not supposed to be am interference fit, is it? If so, the pinion would have to be driven out on the carrier several times while setting preload with shims, and I don't see that in any of the information or videos I can find. These bearings(inner and outer) are supposed to be the same, correct? So I couldn't have put the wrong one on first. Am I missing something here?
Rear is a '77, with an ARB and 4.88s. A while back I broke my transfer case output, and destroyed the driveshaft. I upgrade the output and replaced the driveshaft with another from TW. Shortly thereafter, I started to notice a vibration from the rear. I replaced u-joints, of course. When the transfer case output broke, the driveshaft was completely ruined, with all the yokes egged, and it even ripped the bolts out of the diff yoke. Thinking I possibly hurt the yoke, I got a new one. Here's what I found-
When removing the yoke, i found the pinion nut to be suspiciously lacking in torque. So, okay, I'm pretty sure I banged the rear hard enough to lose the preload. I decided to go through the whole diff to make sure it was right. Ordered a complete kit from WH. Tore the rear down and cleaned it up.
Here is my problem-I installed the inner pinion bearing and started to assemble it into the barrier so I could set up the solid spacers, but the outer pinion bearing is tight on the pinion. This bearing is not supposed to be am interference fit, is it? If so, the pinion would have to be driven out on the carrier several times while setting preload with shims, and I don't see that in any of the information or videos I can find. These bearings(inner and outer) are supposed to be the same, correct? So I couldn't have put the wrong one on first. Am I missing something here?