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53Brook

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  • My Project Cars
    1953 Plymouth Cranbrook

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  • Location
    Lakeland, FL
  • Interests
    Cars, motorcycles and guns

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  1. And it might make a difference that the system is no longer positive ground. It possibly is running backwards creating power where there should be ground.
  2. Plymouthy Adams and pflaming I am certain it is wiring as the solenoid engages beautifully and I can tell the overdrive is engaged, I was just worried that the 12v was too much for the 6v solenoid and was basically overpowering the overdrive system keeping the solenoid locked in.
  3. It is very possible there is a short to ground somewhere. Its the original cloth wrapped wiring and a lot of it is disintegrating especially around the engine. Theres a lot of dirt and grease packed around the engine and trans right now, I've been cleaning and resealing everything little by little making sure the fluid levels are good. Once I get the harness cleaned and visible I will know more. When I used my power probe to test the governor switch and overdrive lock out switch they seemed to be working like they should.
  4. I did have to disconnect the kickdown switch as it was not sending ground to the relay. Right now the relay just has a direct ground. And I will see if I can find a diagram. Thank you
  5. I do not but I have quite a bit of experience with wiring. It seems pretty straightforward, but honestly I am guessing. Looks like solenoid gets power from the relay, and ground from the mechanical speed switch on the trans. But if I had a manual with detailed wiring I might be able to find the issue much easier
  6. I did check the switches and they SEEM to be working properly. The speedometer doesnt work as the drive in the back of the gauge broke but I doubt that changes the function of the mechanical speed switch at the trans. When I lifted the car and put it in 2nd gear and let the wheels spin, I get ground from the speed switch at a certain speed. But even without the ground if there is power to the solenoid it stays engaged
  7. I need some advice. I recently aquired a 1953 Cranbrook with the 218 and 3 speed with overdrive. Rebuilt the brakes, cleaned it up and got it running/driving. The car had been partially converted to 12v before I got it (coil, battery and solenoid) and I have finished the conversion with lights, alternator and reducer for gas gauge and wipers. Everything is working well but my issue is when I connect the relay for the overdrive the solenoid engages when the key is on and the car stays in overdrive unless I turn the key off, remove the fuse in the relay or pull the overdrive disconnect cable. If its engaged I cannot put the car in reverse, and it stays in overdrive even when sitting still. My assumption is that the 6v solenoid is getting too much voltage and won't disengage even though the switches seem to be working as they should. Is there a simple/cheap fix for this or do I need to buck up and buy a 12v solenoid if I want the overdrive to work properly? Thanks in advance for any advice. I have read a few forums but nothing helped yet.
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