REhobby Ｒc car Motor Heat-Sink for 1/10 Scale 540 550 Engine 36mm traxxas brushless Motor 6s esc Blue 30mm

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I have purchased three. The first two fans I purchased run perfect on two of my RCs and third one will not run once it is installed on the motor. The first two RCs have 550 21T motors and the third has a 550 16T rebuildable motor; best I can tell the fan is being affected by the magnetic field on the 16T motor and will not run when it is attached to the motor.I have removed the fans from the heatsink and as soon the motor is held close to motor the fans would stop. I have double checked all the connections several times and it all comes down to the magnetic field being too strong for the fans on the 16T rebuildable motor. My final test was put the third set of fans on the old 550 21T motor I removed, and the fans worked perfectly.

Fit my Reedy 3300kv motor on my Pro4 perfectly and looks great! Fans spin nice and strong not too loud not that sound matters when you're racing around.

That's exactly what it's supposed to do. I'm not very easy on the truck. Driven the truck through a lot of sand a lot of gravel and those fans are wide open not an issue at all with them. Had them all on a pretty damp wet day no issues. Still doing there job. On the Traxxas Slash 4x4 VXL the unit to change the configuration of the fans. And get them to work the way you want them to or need them to or however you need to have it fit I highly recommend moving to speed control forward moving the receiver forward to the front shock Tower to get more room.

The fans took time to install as there wasn't much space to play with. After the installation I had to cut the pin connector off and by an addition wiring harness. The fans and the receiver connector had the same ends (both male) and would not go together.after the connector fix (male to female} it was perfect.