Did it come from the factory with UTD transmission fluid? I'm only asking because I recently had to have my transmission replaced and they used UTD fluid. When I got it back, it was considerably noisier than before. After I changed the fluid to UTD2, it was noticeably quieter. The UTD is mineral based oil while the UTD2 is synthetic. I get very little whine now unless its really heavy stress, when before it was no matter what the input was.