Noise while on throttle

[Donman]

I have 4wd F250 and have a noise that is driving me crazy! Seems to be coming from the front drivers side, I have replaced both hub assemblies and knuckle and axle seals and locking hubs! And just replaced the left one with another brand new hub assembly because I though I got a bad one, and just serviced the front diff. Sounds like a rubbing and only does it on throttle at slower speeds up to about 40-50 and can hear it while breaking at real slow speeds maybe 10-15. Sounds just like what you think a dry bearing would sound like. Does nothing at above 15 with no throttle. Anyone help me pinpoint this, already been on the parts chase!

[Donman]

Well, Ford had it on a lift in gear and come to find out its the rear axle carrier bearings. Has anyone ever replaced these? Is it a big job?

[Turbostang500]

If you dont know differentials, you might want to let someone else do it.

[Donman]

Done quite a few things but busting into a diff isn't one I've helped on or done. Debating on getting it rebuilt, replacing it with a used one, found one for 480$ with 100k miles with a 6 month warranty, or getting a buddy who worked as a mechanic but never did a diff either.

[Turbostang500]

You will need a few tools for the job such as something to hold the pinion yoke while you tighten down the nut (rebuilding), a dial indicator, an inch pound torque wrench is nice and some sort of press for r&r the bearings.

If your bud has this stuff then I guess you can give it a go. If not, might want to go a different route.