What setting's are you useing on your MMM?

MMM 2200kv 8ight t 1.0

start power - Low
timing- low
brakes 30%
punch control 40%
reverse 30%
autolipo - because i use different batterys 4s and 5s.
drag brake disabled.

Just like linc said. Drive smooth try not to brake hard did i mention drive smooth. I also run a 48 t spur with a 14t pinion my fan almost never comes on. Dont forget esc has to reach 150 for it to come on.
Running 5s will help temps as it doesnt work as hard.
Did we mention to drive smooth. Just cause it is 4wd doesnt mean you have to go full throttle all the time trust me you are faster being smooth.

Did i mention drive smooth.