input gear trouble!
 

i'm using a gmaxx single speed converted emaxx tranny. i seemed to have thrown out the two pins that attach the input gear to the input shaft. how do i prevent this with my new input shaft and gear? thanks for any help!

I don't have personal experience with this but I've seen people recommend to use a nail and bend over the ends. It is supposed to be stronger and quite cheap! :)

hmmmmmmm? sounds a little ghetto, lol.

I used one of my hex wrenches (can't remember which size though) It's a bit of a tight fit and may have to be carefully pounded in, but once it's in there just cut off the extra with a dremel if youve got one. Havn't had it break since and I've got alot of torque from the dual brushless.

I did the same thing with a hex wrench, then added some JB Weld to make it solid and permanent.

thanks for the suggestions, i'll try something today.

I had the same problem, i drilled them out on a pillar drill and then put a M3 hex head nut and bolt through it just misses the gearbox casing as is superstrong

Cheers Adam

sjcrss used a hex wrench too. if i break mine sometime, i will do that method...seems cleaner!

I used a spook out of a bicycle rim I had laying around. I have had zero problems since. I broke another stock setup. I may see about the allen wrench trick. I wonder if I spot weld it if that would hold the pin in. :D

i used the "needle" out of a tach-it gun. its like the stock pin but a lot stronger. thanks for the help everyone!

CHC, good luck trying to spot weld a hardened allen wrench to I think the input gear is cast steel...( don't quote me)..but they are 2 different metals.....you could braze them as long as you used a braxing rod w/ flux around it...and a oxyacetylene torch to do it......

and yes I just broke my original allen key fix from over 4yrs ago.... I broke the roll pins back when I first got my Ultramaxxed gears, thought of the allen key trick, and just broke that last weekend.....allready fixed and running again...

Accually I thought the gear was hardened steel. That is why it don't wear out on the metal idler gears. I have heard of people using them for pinion gears on a metal spur. I got some other fixes if it don't work. I may try it and let you know. If I put a spot on each end of the allen wrench so it don't slide thru is all that is necessary. I don't have a brazing torch. I do have a welder.

if your using a mig welder, just take your time and you can actually take a drill bit and drill a little indentation where the pins come out, that way your spot weld has some penetration into the metal.. also don't run the welder to cold....might want it a little on the hot side...if you know what i mean...this way it will be a quick spot, and you should get a good spot weld...

Yep. I have a mig. I got it for some body work on some 1;1 projects. Built a trailer with it to. Now it is making its way into the rc department. I let you know how it works out.

I think the thing that makes the pins fail is it has pressure tranfered from side to side from forward and reverse.