TRX-4M BRUSHLESS System

Legit and original part from traxxas. Great upgrade for my trx4m.

Little pricey but worked amazing would highly recommend

Solid unit easy install

Plug and play

Pros: easy fit and plug and play, you keep the Traxxas radio, insanely slow crawling with the ability to keep consistent speed over obstacles, very quiet, and it is about 2.5X-3X faster than the original brushed motor. Cons: Super jittery at some points, a little more expensive than other competitors, motor heats up super quick and gets very hot, motor hits a point when at 1/4-1/3 throttle that makes it lose all torque and will roll backwards or stop moving all together. I sent the original one back to Traxxas after contacting their customer service department and explaining the roll back issue I was having. They sent me a new system all together but I still had the exact same problem. I went from standard gearing to low range to make the problem less dramatic. I contacted customer support once more just to let them know I was having the same issues as before. This time they said that there’s a point where the motor/speed controller go from low speed to high speed and that’s when it loses torque. When past or before that point, it’s fine and smooth. I might try to retrofit a motor from another company to see if that fixes the issue, but I have low expectations.

Nice ESC and motor. I ran into an installation problem. Two holes on the motor spacer were not threaded. I ended buying an M2 tap and corrected the error rather than go through the return process.