Muncie 4 speed

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May 16th, 2014, 05:53 PM

72blue442

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Join Date: Apr 2014

Location: Texas

Posts: 19

Muncie 4 speed

anyone know what the electric wire connection is for on my 72 4-speed,
It's located just below the clutch fork??

May 16th, 2014, 05:59 PM

66400

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Join Date: May 2009

Location: Austin, Tx

Posts: 1,393

Clutch safety switch, starter won't engage unless clutch pedal is depressed.

Henry

May 16th, 2014, 07:10 PM

jensenracing77

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Join Date: Feb 2009

Location: Brazil Indiana

Posts: 11,503

Quote:

Originally Posted by 72blue442

anyone know what the electric wire connection is for on my 72 4-speed,
It's located just below the clutch fork??

Welcome to CO. That is the TCS switch. When it is all hooked up and working it would have a wire run to the TCS solenoid. This system only allows the vacuum advance to work in high gear.

TCS = Transmission Controlled Spark

May 17th, 2014, 08:00 AM

joe_padavano

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Join Date: Mar 2007

Location: Northern VA

Posts: 47,366

Quote:

Originally Posted by 66400

Clutch safety switch, starter won't engage unless clutch pedal is depressed.

Henry

Nope, sorry. The clutch safety switch is on the clutch pedal. As noted above, this is the fourth gear switch for the Transmission Controlled Spark system. TCS was an early emissions control system that disabled vacuum advance in all gears except high to reduce NOx emissions.