MY TRUCK DAMAGE OVER 4 THROTLE 645MG SERVOS. I RUNING 7955 FOR STEERING. THE RADIO IS 3PM 2.4GHZ I REVISE ALL THE SETTINGS HIGHPOINT ETC AND ALL IS CORRECT. THE PROBLEM IS ONLY IN THROTLE IN TWO DIFERENT TRUCKS IS THE SAME FIRST IN THE REVO AND NOW IN KYOSHO STRRR. THE SERVO STAY GOOD FOR THREE TO FOUR RACES.THE RADIO IS SETUP FOR NO DIGITAL SERVOS. POSSIBLE PROBLEM? I USE THE SAME SERVOS WITH OTHER RADIO/CAR WITHOUT PROBLEMS (KOPROPO HELIOS WITH SPEK MODULE) THANKS FOR ANY ANSWERS

Th 3Pm will work fine with the 645MG.

However, I would go with a higher end servo for 8th scale.
You need a lot of power for braking.

Posible cause of multiples fast servo fail?

645 can work in 8th scale applications.
But, when it was designed, truggies had never been heard of.

It would not be my first choice for an 8th scale car.

the servos that you are using may be fine. chech your reciever pack to make sure that it is not putting out much more than 6.4-6.6 volts. if it is, then that will burn up the servo. your steering servo is high grade so that servo will take the extra .4 - 1 volt because is can be used in robot applications, even though it is not a "robot" servo. Try running a 4 cell reciever pack and see what happens, that will still put out enough torque for your servos. hope this helps.