It'll make quite a improvement in the way truck steers/drives if you upgrade to a 175+inoz strg servo (need to upgrade servo saver also). I think anything over 200 is overkill unless you're running bigger tires. I've made the swap with 2 Tmaxxes and an Emaxx and with stock tires/wheels 175inoz will take care of business.

WIth these 175+ servos, you really need a radio with epa - servos are strong enough to flex chassis if you don't have epa and the servos just torque the strg linkage for all they're worth. When I changed to 175inoz strg on my 1st Tmaxx when I still used rtr radio - I could see the engine head move when I turned wheels lock to lock.