Center Diff Spur Gear??

[Mickstix]

OK, thanks Neil!! Im actually considering converting it to brushless as its so loud now.. Ya think the 60t spur would suffice if I went the brushless route, or do most brushless/lipo trugggies use a smaller spur? (im not sure what range of pinions are available, or if there's enough selection to not even worry about the spur?) I dont think I'd go TOO radical.. Probably 5s would be the max, and that would only be if I raced it once in a while.. I'll probably bash 75% and race maybe 25%.. Thanks again for your time and info!