emaxx troubles! Help!

[FONT="Franklin Gothic Mediu" hey guys i need your help i have an emaxx with a 9xl with mamba max esc, racer x shocks, carbon chasis, ue arms, ive only changed my idler gear which came from rcmonster ive joined at least 6 races last year. My problem right now are my gears it seems that I've been crushin my diffs my tranny gear have been shreded too what could i do to bulletproof my ride and still light enough to race? By the way spur is a regular 66t and i have 20t, 18t& a 16t pinion gear