97 Dodge Ram 1500 5.2 V8 4x4 SLT Laramine

So i have had this loud rubbing noise coming from my front left and sometimes right wheel well. I had replaced both hubs and u-joints. I checked my pumpkin and it was bone dry. So i filled it with gear oil. That was 5 days ago. Still hearing noise. It happens when i hit a good divit in the road. It goes away when i apply breaks and almost come to a stop. the noise started happening around 2 weeks after i got a new cad and o2 sensor installed. What the hell else could this be?

 

Did you take the diff cover off to inspect the internals of the diff when you found out it had no oil in it? or just add oil and go. As there are things that turn in the diff when driving out of 4wd I would suspect side and spider gears are shot along with the bearings, cad bushings might also be shot with lack of oil. Worst case is a complete rebuild of the front diff internals.

 

Havnt heard the rubbing noise in 3 days. Its looking the cause was little to no gear oil. Gotta keep an eye on that kinda stuff for now on. thanks for your help

 

You should still remove the diff cover and clean out the housing.