smaller pinion, more torque less speed
I'm stuck with the spur, because they only make the one for it as far as i know, so my only way of changing it is by changing the pinion, but I'm not sure if i should go smaller or larger with it, and i can't find any charts for it anywhere. Right now, its a 17/55, if i remember correctly, but, i haven't checked it in awhile.
i would imagine given that you dropped a cell, you are losing power (voltage) so in that case i would imagine that you would need to gear it for more torque, less speed. I'm guessing it feels really hesitant and sluggish at the moment. in that case try dropping a tooth or two with the pinion.
The thing i hate most about messing with the gearing in that truck is just how long it takes to get to the gears. IIRC, when i put the 3S set up in it, i spent a couple hours on it because its such a pain to work on, which is why i bought a Granite (well, that was part of the reason anyway), so maybe i should just put that set up in that instead and see what happens. Knowing my luck though, it will be constant breakage, since mine is the MEGA and not the 3S version.
at the moment i have a mega converted to brushless, (its actually the lady's truck), so far been good i am not holding my breath on the spur/slipper assembly, but pretty much just get the HD input shafts and good to go. now really a whole lot of difference between the mega and the BLX besides the slipper and input shafts. (obviously the electronics).
Is this the gear you mean? https://www.arrma-rc.com/part/AR310773 Someone else told me i would need this gear (https://www.arrma-rc.com/part/AR310873) from a 3S truck, and, because it is a 13T and not a 17T that i would also need the diff's, as well as the slipper assembly, spur gear, and pinion gear, but, if the HD 17T will hold up, that makes the parts bill and rebuild a bit easier. I know ill need the 3S slipper assembly, and already have that on my list, along with the Typhon parts to make it wider, but i have been on the Arrma forum getting a parts list so i can do it all at once, instead of little by little. Another thing i have read is, you can't run the 3S slipper without using the adjustable motor mount, so now I'm looking into that.
My LHS guy told me the 17T input gear above is what people around here have been using when upgrading the Mega to be able to use brushless, so far it has held up for me.
I've been told you need the a-arms, turnbuckles, and rod ends from the Typhon to make the Granite a bit wider, which will help stability, but I'm still trying to get a straight answer on if the parts are direct fit or have to be modified in any way first.
I finally got a bit more clarity on this. It seems you can use the new MEGA and BLX parts, with the difference being, the MEGA has all plastic arms, and the BLX has turnbuckles and rod ends, so for 3S, its better to use the BLX parts, and the MEGA parts for 2S.
