Hitec HSR-5990TG
 

is this servo relible. http://www3.towerhobbies.com/cgi-bin...?&I=LXRRC5&P=7
it has tons of torque i have seen some people use it i just want to know what they think of it.

I've been using that servo on a couple rigs for over six months now with no problems. It definitely has tons of torque. The only thing I'd reccommend is that you need a BEC because the HSR-5990TG has a higher operating voltage than say a HS5955TG. 4.8-7.4 vs 4.8-6.0V. When I tried running it without a BEC, the whole truck would just lose power whenever turning the wheels.

thanks. would it be fine running it at 6 volts because the rooster crawler has a bec of 6 volts.

You should be just fine with the rooster crawler, if you have problems, just get your self a ccbec "thumbsup"

thanks