Well it is going to a emaxx trans. The motors share the same spur. I plan on running them off a esc with double wires so when hooked together will try to phase them together. I just need another motor now.

Attach both motors to e-maxx tranny without pinions, solder wires from ESC to motor wires. Do not apply power to anything, just rotate by hand one motors shaft and second one will get into exact matching position. Get your ruler, hold it against shafts and draw the line on shafts. Now you set and good to go, do not forget to mark up and down sides on shaft. Check for spin directions as well...

Artur

Hey griffin, do you think that this would work with 2 aveox motors? I have a pair of 27 series 2000kv motors that I wanted to run on an emaxx tranny on 5s thru a quark 125.

Make sure that wires from motor to motor are shorter then from motors to ESC.
I am assuming that motors are identical in terms of Kv and construction. To check how close they are to be identical, solder them together and spin the shaft by hand. If it spins freely with no hiccups and second motor follows then you have pretty good match, otherwise one of the motors will be dumping that difference into the heat and creating challenge for the ESC.

P.S. We do not have propellers here and vehicles with props do not have differentials between props either, just wheels and mud :)