Just purchased an 02 TN 75 from dealer. It has fwa,power shuttle,loader 1350 hrs.Delivered yesterday morning(1-11-06)After several hours of looking over tractor and reading operators manual it finally occured to me to engage the PTO.Noise starts as soon as the shaft starts spinning and is constant with engine rpm. If you grab the shaft by hand and put a slight load on it the noise stops.Will call dealer Mon. With tractor off turning shaft by hand you can hear this same noise. Any ideas? Thanks for any replies.