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tubman · 04-25-2026, 05:06 PM

I had a '51 Ford in high school with an overdrive, and there was no "tiny chrome switch". A toggle switch is usually added to simplify the operation of the overdrive or simply to eliminate some of the wiring and functionality. It sounds like your system has been "modified", so all bets are off on what does what and when. The stock system I am installing in my current '51 doesn't have a tiny switch either. It does have a relay, a kickdown switch and a factory wiring harness.

04-25-2026, 05:06 PM	#5
tubman Senior Member Join Date: Dec 2013 Location: Minnesota, Florida Keys Posts: 12,143	Re: '51 crestline new to me I had a '51 Ford in high school with an overdrive, and there was no "tiny chrome switch". A toggle switch is usually added to simplify the operation of the overdrive or simply to eliminate some of the wiring and functionality. It sounds like your system has been "modified", so all bets are off on what does what and when. The stock system I am installing in my current '51 doesn't have a tiny switch either. It does have a relay, a kickdown switch and a factory wiring harness.