Front Diffrential 99 Jimmy SLT

I had a grinding sound at 30 to 40 MPH. Fist Mechanic said right wheel hub assy ($160.). NO help. second said lower ball joints replaced uppers and lowers ($150.) NO help. Third said pinion bearing. Took it in to dealer they want to replace the whole front drive line at a $2,500. bill. Any one else had these problem? I thinking pull the diff and take it to a good drive line shop and see if it is rebuildable.

I had a grinding sound at 30 to 40 MPH. Fist Mechanic said right wheel hub assy ($160.). NO help. second said lower ball joints replaced uppers and lowers ($150.) NO help. Third said pinion bearing. Took it in to dealer they want to replace the whole front drive line at a $2,500. bill. Any one else had these problem? I thinking pull the diff and take it to a good drive line shop and see if it is rebuildable.

Ummm....

Checked the front differential fluid lately?

Ummm....

Checked the front differential fluid lately?

Yeap did all that DUH stuff first. I was hoping for a Duh fix but it aint happening. Thanks

Did you change out the fluid?

How is the transfer case fluid?

Checked the U-joints going to the front diff?