Motor shaft and pinion length gripe.

[biggman100]

I did a brushless swap in a Gorgon last night.
Same issues. The brushed 550 is 1/8" longer on pinion side compared to a Spectrum brushless 3660.

I flipped the pinion in both directions, would not fit.

I used a Boom Racing motor spacer (BRLC7032)
to shim the motor.
I still ended up needing to install an oring between the red gear and the small bearing on the end of the slipper shaft.

Between the 2, I got the clearance, Clarence.



Nothing hit, no binding or funny noises so far.

The differences between the 2 motors was so small but it took an extra hour or so to figure out how to adjust for it.

Annoying!!!

That's why, when you see people doing brushless upgrades to the Arrma 2WD's, they use the HobbyWing 3660 3700KV motor, because it's the perfect fit. I finally figured that, since this is literally the only truck I have had that issue with, I'm just gonna get an Arrma 12T and be done with it, unless the motor that @KnowAir mentioned (the one from the 22S RTR), that he offered is the Dynamite 12T, and I'll just use that one. Those motors are nearly indestructible. I had one in my brushed 22S SCT that I routinely buried in mud, ran in snow and water, and punished at a concrete skate park and it lasted well over a year. I did the same thing with my brushless 22S SCT, and the stock brushless motor in that lasted maybe 6 months, but I ran that truck hard on 3S. That's one of the trucks I wish they wouldn't have discontinued.