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Old 04-13-2022, 04:02 PM
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gigaplex
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Originally Posted by Gloff
Hey RCTech!

I recently got back into the hobby with an Arrma Big Rock. That got me digging around and I found my old TC3, blindly bought a brushless motor and a 2S lipo. Need some help with the gearing.

What I have for the TC3 is a Hobbywing 3652 G2 5400kv motor and ESC combo. The gearing in the car is 24/72 pinion/spur. From what I've read the FDR is 7.5 with this setup. I plan to do some drifting and bashing on concrete with plastic and rubber tires respectively.

Should I be changing the pinion or is this setup ok?
That's a pretty high KV motor to be sticking into a TC3, the drivetrain might take a beating. That FDR should be okay to start with, but I'd guess you'll want to be closer to 6.5.
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