Rear diff repair issues

[Bluebird]

Well I took the 05 lr3 to the dealer to replace the rear locker diff under warranty. Picked it up Friday night . Left for a road trip with the wife on Saturday and holy crap the truck is all over the road. It feels like the rear suspension isn't connected to the truck. When I go around a curve the car want to swap ends and the rear wheels begin to steer the car. Very scary feeling especially at 60 to 65 on the highway when you go to change lanes.
Any Ideas?

 

[grommet]

Take it back to the dealer? I really don't think we can diagnose and fix this by message board.

 

[Bluebird]

Defective Wheel Bearing. If you were wondering.

 

[nwoods]

What all did they replace then? Did they also replace the hubs?

 

[Bluebird]

Left Rear, I hope so. Dealer couldn't find the problem until the Mecanic took it home with him. Quote the car "changed lanes on him at 70 mph" on the Parkway. Weird after only 30K miles.
Anyway got my GRIN back.