[crazyjr]

The problem is, that with the bigger teeth you will lose efficiency. It takes power to move through the teeth, the smaller the teeth, the easier, so more efficient. If you do not go to a smaller pitch gear, you may need a 550 novak or tekin to keep motors cool. Honestly, the only people running mod-1 anymore are buggy/truggy. I understand you have a lot of options, but the 40 is almost too small for gearing a stadium/sc truck and running a 540 based motor. If you are dead set, you really need something like a 21.5 or higher turn

Edit Using the tooth count to get diameter i getfor each pitch

48P 86 tooth(standard for slash i think) 1.83"

32 pitch 56 tooth (standard for Jato, comparable to the slash in size) 1.81"

Mod-1 40 tooth (gear you currently have)1.65"

There is enough difference in size to warrant worry in motor heating due to gearing short comings, I think you will be geared too tall with almost any gear you run