So when I bought my coily back in 2008, it was doing this weird thing where I let the clutch out and it didn't do anything for a fraction of a second and then there was a loud CLUNK and off we go.. I got underneath the car and it turns out that there is quite a bit of play in the rear driveshaft / diff.. The drive shaft turns about half a rotation before the diff actually engages and the wheels start to turn.. What would cause this? is it fixable or should I just try and find a new rear diff?
Also, its always made a whining noise under acceleration.. It used to be only when it was under acceleration but lately its been getting louder and happening even in neurtal while i'm just rolling along.. but then it gets quiet again?
I'm confused
Any help or ideas would be sweet

Cheers fellas
Myles