Keep it stock if not u start to stress other parts of the truck with all the heavy payload of torque at least with lower gearing and to big of gear and the motor can't work like its supposed to and will run hot .. The xl comes with a three speed trani ,, keep that .. Do some research on how to tune the three speed and with a few slight turn of it and you'll be ready for the track or bashing ... First things first get the motor tuned then play wit the transmition .. And if you really want to hurt the guys next to you pair it with different motor .. Good luck
Do you ..
---------- Post added at 5:32 PM ---------- Previous post was at 5:23 PM ----------
Sorry got a lil off track
20/44 is beast have ya about 50mph .. Memmer with speed come greater impacts = broke parts ..
Let us kno what u ended up with and where ur at with the build