Archived Need Dana 70 Hub

[NWhitney]

My dad is on his way thought Ky and the Pass. Rear hub and bearing smoked. Bearing can be had but we have not been able to locate a hub. Does anyone know were there is a Dana 70 hub for a 99 4x4 2500 CTD. Also would like some insight on why this puppy failed. We changed the inner seal on the hub yesterday. Dad says axle still has oil and seal is fine but the bearing are trashed and the hub is chewed. We reused the old bearings as there looked good and cleaned everything while is was out. Reassembled and tightened the nut to 120 ft/lbs with hub rolling and then backed of 1/8 turn. Inserted little clip thing in nut and replaced axle. Did we screw up the install or did a bearing just happen to fail? Thank You for all the help in advance.

 

[paccool]

Don't know about the 99 for sure but the 93's have the bearings lubricated from the rear end lube oil. Is the oil level in the diff OK?

 

[NWhitney]

Rear end... aka hub bearing... . oil level is full.

 

[SteveMiller]

No idea if this is the cause or not but when I do these I jack up the opposite side of the axle to make sure fresh lube gets over to that bearing before I drive it too far. When I've had these axles apart it didn't seem like there was a large flow of fluid coming to the outside of the axle and it might not have got enough lube even with the fluid at the right level. Just a thought.



Good luck.

 

[NWhitney]

Dad found a hub 2 hours away from were he is and is going to rent a car to get it. He says the outer bearing looks like it has been melted down :{ . He says the inner one looks ok but the outer one may have never had lube going to it.

 

[BHiggins]

Rear Diff

Whenever I change/check differential oil for any reason, I always top it off, then drive the truck for a few miles and check it again. It's almost always low upon re-inspection. Gear oil is thick (even synthetic) and takes time to work it's way all the way out to the bearings. If you don't have any luck finding what you need, try: www.partsmikeparts.com I bought front spindles from him in the past, he's affordable, and can ship overnight.

 

[dan brooks]

Glad he found one - you would think there would be an aftermarket source for these things.



I've always packed the bearings with grease before reassembling, just in case the lube doesn't get to them.

 

[BHiggins]

Rear Bearing Grease

I don't know how true this is, but I've been told by several people in the truck repair industry not to pack my rear bearings with grease. The reason being that eventually the grease mixes with the gear oil that's supposed to be in the hubs and adversely affects the differential, mainly the clutches in the differential, causing limited slips and lockers not to function correctly and may ultimately lead to premature failure. I've also been told that the bearings in the rear are made from a different material than other bearings, and therefore have different lubrication needs. In short... oil good, grease bad.

 

[NWhitney]

yes oil good... guess what dad forgot to do when he reassembled the assembly. He did not pre oil the outer bearing. Well that mystery is solved! Now I am waiting for him to return from Louisiana with the part numbers and invoice sheet. We think that the dealer that he had to buy the parts from ripped him off... like charged his double what it is worth when he got there. They better hope that is not true or I am going to put STAR and TDR on their A**!!