Re: Wiring Diagram for R-6 Overdrive

Posted by Ross On 2021/5/15 17:55:47

If it is an R6 it will say it somewhere on the overdrive case. The solenoid is much smaller than the all-electric units, and there will be no provision for a governor. The unit upshifts at about 30 by means of flyweights incorporated within. Of course the lockout lever needs to be pushed in and the driver has to lift his foot momentarily for the shift to complete. The unit will fall back out of overdrive on its own at about 20.

Any old push-pull cable will work for the lockout as there is no need for for any electrical connection. Just make sure it will move the lockout lever on the side of the case through its full throw.

There is no need for electrical lockout or manual lockout when reversing as that is taken care of internally by a cam integral with the 1-R shift arm.

Kickdown is achieved by energizing the solenoid. Any push-buttton switch will do, or use the top two terminals on a normal R-11 style switch to operate any old relay that will send ,oh, ten amps or so to the solenoid. The only other wire you need is one from the ign terminal on the solenoid to the dizzy side of the ignition coil to burp the engine while the shift takes place.

The R6 units work quite OK but the upshift tends to be abrupt when the unit is warm. Be sure to fill it with GL-1 90 gear oil.