e-maxx tranny woes

[steveo]

got a 2.5 e-maxx tranny giving me some trouble only replaced one idler gear and a shaft for the idler gears, for some reason the two halves would not go on right and fit correct, anyway i manage to get it working install head out with my new lipos truck is doing great then starts making noise and then the tranny locks up

is there another tranny i can use instead, maybe a new 16.8 e-maxx or a summit would be even better, would they be a semi bolt in i know there would have to some modifying but i have a bomb- proof torpedo chassis which can be easily modified, i've even been looking at rc4wd crawler type 2 speed trannys

one more thing does anybody know what the final drive ratio e-maxx tranny 1st and 2nd gear with a 70/18, i need a base line if i can use an rc4wd tranny(not including diff ratio)

thanks