Dedmon, it's not that the motors are more quiet, but the steel gears themselves. The metal used in the HL gears, and I believe their design itself, is a cause of a lot of the ringing noise we hear. My first tiger still has the metal gears and it's obnoxiously loud. I also remember a thread a year or so ago where Pzrwest filled the backs of the gears with some type of resin to deaden the noise made from the gears and he said that was helpful

Found it... http://www.rcuniverse.com/forum/m_73...tm.htm#7318309 He just used silicone caulking to fill the gears