I heard that the straight cut bevel gears will be louder than the old spiral cut gears, and I heard tighter is better as long as you aren't hitting the root bottom of the teeth. I've never driven my Prowler except with the new style bevels. So I don't know how the noise compares. It is somewhat whiny, but I guess maybe I have gotten used to it now.
-2011 Polaris RZR-4 800 (SOLD)
-1999 Polaris Sportsman 500 ATV
-2006 AC Prowler 650XT (SOLD)-- updated bevel gears, updated oil pump driven gear, 4 wheel disc brakes, line lock E-brake, Papa Slap clutch, Xentec HID's, Dynatek CDI, Warn skid plates, Intellitronix gauges, 2010 intake/cvt duct work and dust shield, RZR seats, Bestop folding windshield, full cab kit, rear cage and rear seats (4 seater)