Originally Posted by
ozzieramirez
I have a 17.5 motor and the gears are used. I bought the car a few months ago. The pinion I have now was from a 1/10 associated buggy. The car rolls fine without the gear and pinion touching. Maybe I'm not using the right pinion.
QUOTE=Johnny Wishbone;15642033]Are they new or used gears? Is the mesh set correctly? Gear selection has a lot to do with what motor you plan to run, so you'll have to tell us a little more info.
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OK, so a ballpark FDR for a 17.5 would be around 5.0, track and timing dependent. I'd start there and check motor temp after 3 minutes and go from there. Sometimes used gears just get loud especially if they are worn to any extent. I'm hoping your using the same pitch gears unless your using a Tamiya gear which has a slightly different pitch then the normal gears.