Can i have some expert help?

[ashleyb4]

Last thursday i took the xx4 don the club and i was just giving it a whirl to test my tranny was working ok as i had broken part of the pot inside of it. When i put it down the drive chain didnt sould to good so i thought OH so i stop straight away well tonight i have checked it and it doesnt make the noise any more but i think there might be something wrong with my diff as when you accelerate and then let go of the stick the back wheels stop really suddently no role at all i have got no drag break on my front wheels just keep spinning due to the clicker. But why do the rear stop so sudenly. I think this may be a reason for my motor troubles.

A