Rear differential bad?

[97marooneclipse]

I bought a 1997 GSX 5 speed with low miles and a bad motor. I replaced the motor and everything has been going smooth except one thing. There is a terrible vibration when in power (around 3500 - 4500 RPM's) it has the stock t-25 so it's at full boost when floored. I've checked the u-joints and carrier bearings with nothing unusual. The rear diff bushings are also good I can barely even budge the diff while using a pry bar. Also has a clunk if you let out the clutch fast, not launching but just letting it out quick. Is there a way to see if the differential is bad? Thanks in advance.

 

[97marooneclipse]

Would it also cause a bad clunk when starting to move?

 

[Colt4G63 also]

Absolutely, if the CV joint is worn enough.

 

[97marooneclipse]

Ok I will check them ASAP thanks alot! Thanks everyone. I will let you know when I get to check them, my garage is kind of tied up ATM with one of my other DSMs.

 

[shampoo]

How many do you have!?

 

[97marooneclipse]

4