Close ratio gearset for Tamiya...???

[Lil Giants]

Originally Posted by Aero 9000

You could add another 3:1 to the primary reduction by adding extra gearing from the motor but that would considerably increase the torque that the counter and clustershaft gears (and more importantly the drive dogs) would encounter.

The Tamiya plastic gears and selector mechanisms are a good set up for high speed use but i doubt they would last well absorbing high torque, so extra primary reduction is not a good idea...

I have proved it for years that the Tamiya 3spd can handle 3:1 aux primary gearing.

I have a 6wd GL weighted down to 17lbs with 1.9 heavy grip tires pulling a 35lbs bellydump trl up a 12 degree incline for literally hundreds of miles over the last 5yrs or longer.. it's the original trans in that trk & I have never replaced a gear or dog clutch in it. This trk runs an FM radio system that glitches on occassion while under full load, so the 3spd trans can take the shock of an abrupt start/stop as well.

What's nice about transplanting the hilift t-case is the added 2.1:1 additional reduction on the back of trans for a wee bit more torque & slow speed control of the trk. A reasonable compact, lower profile setup. I run the incline in 2nd gear all the time, 3rd gear for bobtailing and 1st for maximum traction in soft ground conditions so as not to slip a wheel & dig a hole.