Well run the car on jack stands last night, good news and bad news. I still have gear noise. But, I dont think its coming from the rear end. I think its the T56. I can run it from 20 to 80 mph in 4th with no noise. As soon as i shift into 5th and do the same thing I start to get noise, then put it in 6th and it gets louder. Same mph in 4th no noise, same mph in 5th start to hear noise, same mph in 6th noise gets louder. The drive shaft is spinning the same speed at that mph no matter what gear I am in, just turning more engine RPM. So, looks like I might be learning how to rebuild a T56 transmission.
Going to drive it as soon as the monsoon lets up here....