What's whining trans or rearend?

Thanks for the input.

Since I want to put the original pumpkin back in I was mostly just trying to verify that it was the rearend making the noise. The one in the car now came out of another rearend. I was thinking even though the original one only had about 60K on it it would probably be a good idea to have someone check it out before it goes back into the car. I don't remember any problem with the original pumpkin.