Rear End Noise

[DieselChemist]

My rear end sounds like a small plane taking off. The seal around the pinion leaks decently. I think it is a bearing, but just looking for some input. I know it is not the axle bearings because I can remove the axles and spin the wheels and no whine. But once you hook it all back up it whines. I was going to replace the seal but how do I fix the other parts?
Thanks
Bill

 

[NJKen]

It would help to know a little bit about your truck. I am going to assume you have the Ford 10.25 rear axle and not the Dana. Regardless of what axle you have it sounds like you have one or more bad bearings in there. You can sheck the outter pinion bearing almost as easily as changing the seal. Once the seal is out you can get the bearing out. If the bearing is worn badly (just might be) you will need a rebuild to repair it properly. If you get a god bearing kit and have a moderate mechanical aptitiude you can do it youself on a Saturday. Repost with your thoughts on this and there are many here who will be glad to help. You've found the rite place!
Ken

 

[DieselChemist]

Sorry this is my sig. I will try to look at the bearings. Also how do you tell between a Dana 60 and a 10.25 and what kind of Dana front ends came on a 87 F250

 

[sle2115]

Most likely a 44 up front, that is what most I have seen have, including mine. Here is what the 10.25 looks like - http://photos.thedieselstop.com/showphoto.php?photo=25942&papass=&sort=1&thecat=998

10.25 has 12 bolts in the cover.

 

[geonc]

Dana 60 rears have stubby hubs that are visible past the wheel and "shoulder" type axle bolts.....very similiar in apperance to a Corporate 14 bolt.

10.25 Sterling rears have hubs that stick out twice as far as the 60 and the axle bolts do not have shoulders nor washers.