Let me start off by saying Hitecs customer service is the best I've ever dealt with in this industry with that being said;
THE HITEC 7940 IS THE BIGGEST PIECE OF CRAP EVER!!!!!
I bought 4 of them in late October and 3 out of the 4 have been back to Hitec twice now. The only reason its not 4 because I traded the fourth one to Truhe for a 7950. I just got 2 of them back last week and BOTH went out again Saturday. The 3rd is still at Hitec. I have been using them as throttle servos and both went out in my buggy and truggy Saturday the bad part is the one in Truggy went out while breaking a motor in. These Servos have been in the mail more than they have been in my Vehicles. I had to go to the local Hobby Shop and buy 3 7955's just so I could race in our points series. I have an old 5955 that is over 3 years old and been in 3 different tuggies and its still fine. I am sending these back again in the morning and asking them not to send them back THEY ARE GARBAGE!!!!!!! The motors are going south and the gear is also. I just hope they will switch them out for 7955's so I dont have this problem anymore. Like I said in the begining you cant beat there customer service but I'm tired of having to deal with customer service I just want the freakn servos to work so I can race and be mad at my driving not the SERVO!!!!