I have the same problem with my new cab tractor. I might try some different hydro fluid after break in and see if I can find something that will quite it down a little. Even with the noise I still love the cab. I just turn the radio up and forget all the back round noise. My biggest problem is I get too hot while I'm out plowing snow! I can't wait to try out the ac this summer.35DMAN said:If I had a complaint it would be the hydrostatics are a bit noisy in the cab. Can't hear the radio as well! Ha!