IllianaXJ
NAXJA Forum User
- Location
- Southwest IN
History: Ford 8.8 rear axle; set up with 4.88s/Detriot and a Yukon master install kit several years ago. Probably 5-8k on it. Pinion seal leak repaired August 08. Noticed "angry sparrows" consistent with ujoints around October. Changed all ujoints and centering yoke in d/shaft, still noisy. Traced it to the outer pinion bearing, changed last week. Old bearing slid right off the pinion and had wear marks inside. New bearing tapped on with piece of tubing and a hammer. Reassembled, drove for a few days.
The squeal is now back and is coming from the same place. Under 20 MPH - nothing. 20+ it squeals. It is worse under load, but still makes noise while coasting. I have verified the diff is full of fluid to the fill plug (Solid cover), so I know it is getting lubricated. When we reassembled the pinion, the nut was tightened until there was no in/out play, and it spun with just a bit of drag. Can't remember torque offhand.
Any ideas on why the bearing would be making noise after only ~20 road miles? Preload or torque incorrect? When the seal and bearing were replaced, both times only the pinion was touched, the diff cover wasn't even opened.
The squeal is now back and is coming from the same place. Under 20 MPH - nothing. 20+ it squeals. It is worse under load, but still makes noise while coasting. I have verified the diff is full of fluid to the fill plug (Solid cover), so I know it is getting lubricated. When we reassembled the pinion, the nut was tightened until there was no in/out play, and it spun with just a bit of drag. Can't remember torque offhand.
Any ideas on why the bearing would be making noise after only ~20 road miles? Preload or torque incorrect? When the seal and bearing were replaced, both times only the pinion was touched, the diff cover wasn't even opened.