Replace bearings or differential??
I would replace the whole differential than just the bearings. Look up a company that specializes in differentials the price should be around $800- $1100 for a complete rebuild of the differential, compared to a $1200-$2600 that is from the dealership estimate.
had my pinion bearings replaced a couple of months ago by a mobile mechanic in my driveway cost me $550.00 2000 f150

