Servo help

[CK9887]

when i was at the track sunday with my T3 i went through 3 gear sets on my Hobbico standard servo in about 30 minutes of driving, i didnt even hit a pipe or anything to cause it to do this, the gears just stripped out when i would turn.
So i have decided to get a MG servo.

Here are my 2 top choices:

http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXUZ87&P=7

http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXUZ89&P=7


Out of torque and speed i would pick speed. And the faster servo out of those two still has 75 oz of torque which is plenty for racing off road with my T3, so it would seem like the best choice would be the speed servo (1st link). Except if you read the features of the 2 servos it seems that the higher speed one has 3 metal gears and a plastic one as where the higher torque servo (2nd link) has all 4 metal gears. Will i be better off with the 4 metal gears, or is that one plastic gear on the speed servo not one to worry about? But i would hate to spend 40$ on a MG servo to have the one plstic gear in it strip, lol. I noticed there are a few MG servos with the first gear plastic, why? Why dont they make them all metal, or is that first gear very unlikely to strip?

If there are any other MG servos that i should look at then post a link. ( I dont think i want to support hobbico though, as there plastic gear servo i bought was junk.)



thanks

[rocknbil]

Well not to argue, I have had several Hobbico's and as standard servos go they're average. Something else is going on with you there . . . . it could be anything from your horn screws being too loose, the wrong number of splines on the horn, or steering binding up so badly it's overstressing the head. I'm voting for #1 or #2, maybe.

[CK9887]

well i had a standard servo from futaba before this one and it worked for a while and took a lot more abuse before it stripped.

But i did have to position the horn different for the new hobbico servo because the horn linkage would rub on the top plate (the piece above servo saver). So i had to turn the linkage to where it was on the inside of the horn so it wouldnt rub the top plate, Do you know what im saying???

[walleye1]

I need help in choosing servos for a (built from scratch truck)
how do you decide what is heavy enough? I was told to
buy 1/4 scale airplane servos

[Sherminator]

Ck, i think out of the 2 servo choices id take the 1st one, its a little faster and you arent going to need all that torque especially in a T3. but either one will easily do the job.

[baih]

the first one 625 would be the best of your choices. the 645 is too slow