I've got a '55 Chevy 2nd series and I'm not sure how the overdrive should work. (Parts may be missing). Is there a manual that covers all this information real well? I've been told you have to push in the clutch and pull a knob on the dash. The knob and cable are gone, but I can see where it would attach on the trans. Also, there are things on both sides that look to have had wires going to them. The one on the driver's side looks like a solenoid of some sort. What is that for? There is also something on the right side with wires. Any help would be greatly appreciated. The wiring is mostly missing so I don't know where they should go or anything.