Muncie 4 speed

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May 16, 2014 | 05:53 PM

72blue442

Thread Starter

Registered User

Joined: Apr 2014

Posts: 19

From: Texas

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 16, 2014 | 05:59 PM

66400

Registered User

Joined: May 2009

Posts: 1,393

From: Austin, Tx

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

Henry

May 16, 2014 | 07:10 PM

jensenracing77

Registered User

Joined: Feb 2009

Posts: 11,902

From: Brazil Indiana

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 17, 2014 | 08:00 AM

joe_padavano

Old(s) Fart

Joined: Mar 2007

Posts: 50,803

From: Northern VA

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.