Legacy drive problem.

[Wil]

Hi, I have just fitted a new osr bearing hub on my 05 legacy 3.0 est, 05 yr.   Had to totally remove from the drive box as it was stuck in old hub. All was replaced, but now.. Iam loosing drive..Engine revs up but don't get any were...and appears to be a slipping noise from that rear right wheel...like something not seated right.... Earlier today had awd light come on and lost all drive.. Let it stand..and went to clear any codes and there was none.. Re started and managed to get moving. Didnt have this problem before I changed hud/bearing. 

Any ideas please. 

Regards

WIL.