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One of the hardest steps...

Now we must make a circuit which gives us the ability to send a signal to ground @140hz, 35% duty cycle.

The way it works is pretty simple, in first gear- the shifter sends a "input 1st +12volts" which then goes and uses transistors to "turn on" the two solenoids used for 1st gear.

a 555 timer IC then takes these two solenoids and sends them to ground (thus working the solenoid!).

The solenoid useage per gear goes as follows:

Gear	Solenoid
1st	L/R & 2/4
2nd	None Needed (limp mode= 2nd gear!)
3rd (direct gear?)	2/4 & OD