RC10Talk - The Net's Largest Vintage R/C Community

The red black black receiver wire is very probably airtronics. I have a tekin with an airtronics pigtail.

I don't know the pinout by heart but red is power, one black is signal and the other is gnd. Lots of servo pinouts found online between all the brands.

On the old Airtronics the pin out is: Red 6v; Black(middle) Gnd; Black (outside) Signal.

https://img2.associatedelectrics.com/pdf/cars_and_trucks/RC10_Classic/RC10_Classic_Kit/manual_RC10Classic_2013.pdf Screenshot_20210714-101451_Drive.jpg Screenshot_20210714-101506_Drive.jpg For the thrust bearing, I use whatever general purpose grease I have handy, usually something for a fishing ree...

No, not normal.
That is an AE 32P spur gear but I have modern 48P Kimbrough gears that fit the same.

But you should be aware that there are spur gears with different hub diameters out there.

fwiw - I had a hub like yours bitd that was badly worn. I happened upon a short length of brass tube in one of my junk boxes that seemed to fit both parts perfectly so I cut it to proper length and CA-glued it to the hub and it's been doing fine ever since. Today it's in one of my frequent runners a...

As I said, you can try a Traxxas spur as well.

The center is close enough that it will still physically fit on a standard tube, but the fit is too tight for the diff to work.

This is from the RC10 Classic manual. It even has a 19T listed.
I'm about to put a 19T Radon in a six gear car. I planned on starting with 81/18, 48P gears.

Keep in mind that early RC10 tires are shorter than modern 2.2 tires, changing the effective gearing.