- Messages
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- Arrma RC's
- Kraton EXB
Hi there,
so i see a lot of people have problems with their EXB Diffs. Mine got wrecked simultaneously, front and rear, not because of a crash but because they wore out after maybe six full battery runs. A possible cause for this may be the friction created by the 2.6mm hole in the out drives and the 2.5mm pins. I attached a high magnification photo (IMG_1187) of one of them here. So the friction creates these two breaking points and makes my diffs go boom, tearing some gears apart as well if I'm lucky At least that's what I figured.
I came up with two "solutions" I'm testing right now, one in the front diff, one in the rear diff. But I wanted to maybe hear from you guys, what you came up with to toughen up those diffs.
So in the front diff, I used pins from my Maxx's stock hex hubs. I don't expect particularly much from this. I use 10k fluid and two shims for this one.
For the rear diff I bought German-made M-line outdrives and 2.6mm pins from Kyosho I filed (correct term?) to 2.5mm at the ends so they fit the 2.5mm "openings" (I don't know how to call it) of the gears. 10k fluid & 2 shims as well.
So that's what I'm testing at the moment but there some weird additional problem with bent rear hinge pins. The attached pics are the result of one battery run. I did a couple of jumps on my ramp and I was super careful, not to jump too high and I landed the thing perfectly all the time. No crazy stuff. Plus, it landed on very soft ground... medium high, wet grass. The things I altered for the rear suspension are RPM arms, GPM drive shafts and GPM hinge retainers... (I can't get my hands on too many m2c parts here... sadly) note that both hinge pins are bent towards the rear. So what could possibly be the cause of this? Maybe those drive shafts being a bit too long? I dunno. Or those retainers with their weird plastic balls... maybe those are a design failure. What do you think?
I use a MAX8 G2 SD - 4278SD 2250kV to power the thing. For my first 1/8 I wanted a sensored motor for some reason. It drives like a dream
So yeah, I'm thankful for any help here guys.
so i see a lot of people have problems with their EXB Diffs. Mine got wrecked simultaneously, front and rear, not because of a crash but because they wore out after maybe six full battery runs. A possible cause for this may be the friction created by the 2.6mm hole in the out drives and the 2.5mm pins. I attached a high magnification photo (IMG_1187) of one of them here. So the friction creates these two breaking points and makes my diffs go boom, tearing some gears apart as well if I'm lucky At least that's what I figured.
I came up with two "solutions" I'm testing right now, one in the front diff, one in the rear diff. But I wanted to maybe hear from you guys, what you came up with to toughen up those diffs.
So in the front diff, I used pins from my Maxx's stock hex hubs. I don't expect particularly much from this. I use 10k fluid and two shims for this one.
For the rear diff I bought German-made M-line outdrives and 2.6mm pins from Kyosho I filed (correct term?) to 2.5mm at the ends so they fit the 2.5mm "openings" (I don't know how to call it) of the gears. 10k fluid & 2 shims as well.
So that's what I'm testing at the moment but there some weird additional problem with bent rear hinge pins. The attached pics are the result of one battery run. I did a couple of jumps on my ramp and I was super careful, not to jump too high and I landed the thing perfectly all the time. No crazy stuff. Plus, it landed on very soft ground... medium high, wet grass. The things I altered for the rear suspension are RPM arms, GPM drive shafts and GPM hinge retainers... (I can't get my hands on too many m2c parts here... sadly) note that both hinge pins are bent towards the rear. So what could possibly be the cause of this? Maybe those drive shafts being a bit too long? I dunno. Or those retainers with their weird plastic balls... maybe those are a design failure. What do you think?
I use a MAX8 G2 SD - 4278SD 2250kV to power the thing. For my first 1/8 I wanted a sensored motor for some reason. It drives like a dream
So yeah, I'm thankful for any help here guys.