Ok my question is on the rearend behind the driveshaft yoke there's a plate covering the seal is it supposed to be tight, / loose and spinning around.

 

Should be semi-permanently attached to the yoke.

 

I've got a lot of play when I turn the yoke right or left?

 

What's the easiest way to Reve yoke nut?

 

The dust cover should be somewhat attached to the pinion, shouldn't be rattling.

If you have a gear/cog locker (aftermarket), 1/4-1/2 turn of the pinion is normalish - it's from the cross-shaft having a little play between the carrier and locking cogs. I thought it was alot at first, after pulling the diff cover I figured out it was okay.

A clutch-type limited slip should have a tight pinion, as should a regular open carrier (unless, like the cog type, the crosspin has wallered itself out a bit)

 

The bearing behind the yoke is worn out. Not destroyed yet!!! How do I fix that dust cover?

 

Tack weld it back on.