Rigidrc 4 Speed Transmission Review

[9W Monighan]

I picked one of these tranny's used but never installed in a truck, off Ebay out of curiosity. Did a search and came up with little or no info other than their website. I breifly hooked it up to 6V and tried shifting through the gears. It did seem a bit noisy due to the straight cut gears and backlash in the shifting dogs. I didn't take pictures of the 2 servo mounts that also came with it. Next I tore it down to see what was inside...
Looking it over it looked very well built.

Top view looking down on the shifting fork levers.

Mechanical disc brake.

Underside showing dual outputs for 4WD.

Brake Caliper and Brake disc.

Interior of the final reduction or transfer case. This can be removed and a supplied drive shaft can be added to remotely mount the transfer case.
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Inside gearing and shaft assemblies.

Looking into the main case showing shifting forks. I couldn't remove the 1.5mm hex bolts because they are very tight and the hex is a very sloppy fit to my allen wrench. This was a problem throughout disassembly because of the cheap bolts used. I had to chisel some to get them out.

Inside the primary reduction showing bull gear and motor pinion. The case is slotted too for different pinion tooth changes.



All of the parts

Close up of gearing


Tooth counts.


Enjoy.