Rear end noise

[eightbanger]

So i've just put my D/S back on the truck with my new combo U/J where it broke out of the pinion yoke, started her up and took it very gingerly out the drive and onto the road, I could not get it much over 15mph as a strange vibration and or whiring sound would start to come from under the truck. Had a look underneath and nothing had changed except for a small oil leak from behind the pinion yoke so I realise that means I need a new seal. But can anyone tell me what other unseen damage could have been done to the axle when the D/S broke out of the P/Y a few weeks back??