Help not sure what it is

I ease off the clutch and I get a strong vibration coming from the rear. Like clutch chatter but it's coming from the rear end. Could it have something to do with my stock driveshaft? Buddy has a g force aluminum driveshaft for sale. Hoping that fixes the problem. What do u guys think it could Be? Please help

Why another thread with the same question hrs later?

Was an accident