Originally Posted by
fanofphilly
The gentleman I bought it from told me to get 2 - Futaba S3152 Digital Standard High-Torque Servo as well as metal horns to go with that.
My local hobby store told me to get 1 Ace RC / Team Associate DS1510 and go from there.
That's some bad advice you were given. A truck like your Emaxx should have at least 250oz of torque, closer to 300oz would be better. The Traxxas 2075 servos that came in your truck each have 125oz of torque for a total of 250oz. Those Futaba S3152 are 70oz each while the Ace DS1510 is 135oz and the transit speed on both is very slow. Avoid these two particular servos.
If you don't want Traxxas servos and want a nice easy, direct replacement get a Futaba. Traxxas and Futaba use the same number of splines on the output so the Traxxas servo horn will hold right on. The stock servo horns can of course be replaced so don't let that stop you.