Hooking up the Electronic Control Box

 Wiring to the control box is straight forward and is simplified by color coded connectors that use telephone style RJ-11 jacks (Photo 16) to plug into the control unit.  Be sure cables avoid sharp edges and possible contact with areas of excessive heat. 

 Wiring the overdrive and electronic control box:

 A.   Mount the electronic control box in a location that will not be exposed to the weather and has good air circulation.

 B.   Hook up the wires to the solenoid (no polarity) and control box (white color coded connector.)

 C.   Hook up the wires to the signal generator sensor (Photo 17) and control box  (yellow color coded connector.) The signal generator wires have no polarity.

 D.   Hook up the master on/off switch  (red color coded connector - Photo 18.) The master switch includes a green light that illuminates when the overdrive can be activated. It can be mounted under the dash.

 E.    Hook up the manual overdrive switch  (large red knob with a black color coded connector - Photo 19.) The manual overdrive switch can be mounted under the dash or on the gear shift lever.  Alternatively, you can install a foot switch or other less conspicuous switch to turn on the overdrive.  A simple single pole single throw (SPST) switch can be substituted to fit your installation requirements. Steve Litman substituted a switch with a push-pull mechanism that had a knob that illuminates when the overdrive is activated.  The author used a toggle switch with a handle that lights when the overdrive is activated.

 F.    Connect electronic control box to a source of switched 12 volts (red color coded RCA plug) using the in-line 5 amp fuse provided. (NOTE: add a box of 5 amp AGC fuses to your spares kit.)  For 6-volt cars, an inverter can be used to boost the voltage to 12 volts for the control box.

 G.   Connect ground wire (black color coded RCA plug) to a good ground point on chassis.

 Install lockout switches as desired.  Some installations have placed micro-switches in the first, second and reverse gear gates to assure that the overdrive cannot be engaged in these positions.  According to Gear Vendors, the lockouts are unnecessary with the control box since the signal generator sensor detects the vehicle’s speed.  The combination of the signal generator and control box are designed to prevent the overdrive from being engaged in reverse and at speeds slower than 20 mph. 

Section 1 - Disconnecting Torque Tube
Section 2 - Removing the Front Section of the Torque Tube
Section 3 - The Mathematics of an Overdrive
Section 4 - Checking Universal Joint and Bearnings
Section 5 - Installing Overdrive in Drive Line
Section 6 - Overdrive Lubrication
Section 7 - Connecting Speedometer and Electric Controls
Section 8 - Hooking up the Electronic Control Box
Section 9 - Hooking up Speedometer and Calibrating Output
Section 10 - The Overdrive in Operation
Section 11 - Overdrive Service
Section 12 - Crusing in Overdrive
Endnotes - Endnote
Table 1 - Silver Ghost Rear Axle Gear Ratios Comparisons
Table 2 - Engine Revolutions per Tire Turn
Table 3 - Overdrive Speedometer Gears for the Silver Ghost