Rear differential noise

[jrprokop]

I suddenly am getting a loud grinding noise which I assume is coming from the rear end gear. It is very loud while coasting (not on the gas). Approximately 200 miles ago I repaired a leaking pioin seal, which required removing and replacing the pinion yoke. I followed recommended procedures, including measuring the rotational force of the pinion to replicate the preload on the pinion bearing. I also replaced the fluid with synthetic and friction modifier. Well, my guess is that I got the pinion too tight or loose. I want to fix this myself. Where should I start? Should I get a complete pinion installation kit of try to get by with just a pinion bearing and crush sleve. Thanks for any advice. 99.5 F350 10.5 inch rear, Automatic Trans.

[jrprokop]

I took apart the rear end and removed the gears. Here is a picture of the center carrier. There is damage from the pinion gear rubbing. The pinion actually looks verty good considering the damage it caused. My plan now is to reinstall the pinion with new bearings. I have a beter quality inch pound torque wrench on the way for a beter preload set up this time. I am going to re-use the carrier bearings. Hopefully it will all line back up. I will check the back lash too. Does this sound like a good plan? Any sugestions regarding backlash or gear pattern?

[SCUFFY828]

should be fine it installed correctly , looks like you definitly didnt have the pinion gear tight enough