I haven't seen a SXS that didn't whine from the tranny except for the Yamaha. But I think all the auto's (CVT) whine. I can't hear it on my CForce 500 HO EPS, the exhaust is louder than I like, and the fan is making a lot of noise too. I'll be tearing into it this fall or sooner. I'd hate to have to re-engineer everything to make it quieter, but we'll see.