I have sketched both of these out …I just cannot make the connection how this works To engage and so this is kept well away from this weak link by the Overdrive switch as this is almost always part of a moving objectĪnd wear and tear on the wiring as gear levers or indicator stalks This arrangement keeps the high current feed away from the C2 of the 22RA is a fused 12v feed capable of highĬurrent and C1 will go down to the overdrive solenoid. Overdrive switch, which in my case is embedded in the gear leverĪnd the other side of the switch goes to W1 of the 22RA. (green/brown) and this goes to the back of the car. Wire 12v to W1 of the 6RA changeover relay and take W2 to the To use the switches correctly and not strain the wiring loom, useĪs follows with a 6RA changeover relay and a 22RA starter relay:. Your risk) play the traffic light grand prix and make a lightningįast change up half a gear from just after the start. The exception isįirst gear, where OD creates and intermediate gear, so you can (at So it has no real practicality in these cases. The gears already present if it is used from second or third gears,
On box, you may find that engaging the overdrive simply replicates Synchro box and the drop in gearing when OD is selected, depending If you look at the spread of gears on the 4speed The secondary objective is to have overdrive available from 4th to The main objective is not to engage the overdrive (’‘OD’’) when Second relay protects you from having to pulse 17 amps through the It uses just 1 amp to stay open but a hefty 17 amps to fire,įire being the operative word you will be wishing to avoid. If you don’t use a second relay (a high current 22RA) then you riskīurning out your wiring as the overdive solenoid itself can stick Gearbox top cover which is over the fourth gear selector fork. Top gear only, run the c4 wire through the second switch on the The overdrive can thus only be activated if not in reverse gear andĪutomatically deactivates if reverse is selected as the 12v isĭiverted to the reverse lights. The other end of the overdrive solenoid is earthed through its Take a NEW fused 12v supply with a wire capable of carrying 17ampsĪnd connect to c2 of the 22RA. Side of the overdrive switch to the w1 winding of a 22RA relay and The c2 contact will have 12v on it any time reverse is not engaged.Ĭonnect it to one side of your overdrive switch. Instead of this use it to supply 12v to the w1 winding of a 6RAĬonnect the same 12v from the w1 winding to c2.Ĭonnect the green/brown wire to c1 so that the reverse lights come
This usually supplies the 12v (green) to the reverse lights The gearbox top cover has a switch over the reverse gear selectorįork.
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