’73 M-20 Muncie wiring question
Thread Starter
Racer
Joined: Jul 2004
Posts: 352
Likes: 1
From: Minneapolis Minnesota
’73 M-20 Muncie wiring question
The transmission has a single(one wire) electrical connector screwed into the side cover below(into) the front shift linkage. What is the function of this switch and what does it tie into?
Race Director
Joined: Dec 1999
Posts: 11,094
Likes: 990
From: Sierra Foothills CA
I believe it was part of the emissions system. There's some info about it in this thread-
http://forums.corvetteforum.com/c3-t...-question.html
http://forums.corvetteforum.com/c3-t...-question.html
Race Director
Joined: May 2006
Posts: 16,528
Likes: 53
From: Dayton, Ohio
I believe it was part of the emissions system. There's some info about it in this thread-
http://forums.corvetteforum.com/c3-t...-question.html
http://forums.corvetteforum.com/c3-t...-question.html
but that thread is not worth reading IMO.The switch is for the TCS system , transmission controlled spark.
It will interrupt the vacuum going to the vac advance can on your dist.
For best overall performance bypass the TCS solenoid and go straight to manifold vacuum,switch on the tranny will just sit there.
Race Director
Joined: Dec 1999
Posts: 11,094
Likes: 990
From: Sierra Foothills CA
but that thread is not worth reading IMO.The switch is for the TCS system , transmission controlled spark.
It will interrupt the vacuum going to the vac advance can on your dist.
For best overall performance bypass the TCS solenoid and go straight to manifold vacuum,switch on the tranny will just sit there.
Thanks for summing it up. I didn't have time when I posted the link to read through that mess again. I think that one poster in particular, who clearly never scored well in the "plays well with others" category, tends to bring out the worst in others.
Race Director
Joined: May 2006
Posts: 16,528
Likes: 53
From: Dayton, Ohio
No problem , if the OP read that whole thread he might have needed 1/2 a case of beer to settle his nerves. 
Le Mans Master
Joined: Mar 2001
Posts: 6,640
Likes: 287
From: Ann Arbor Michigan
Here's a article from a NCRS mag (about 1/2 way down) on the 71' TCS system which is close to the 73'.
Gary
http://ncrsrmc.org/Downloads/Mar-2006-Newsletter.pdf
Gary
http://ncrsrmc.org/Downloads/Mar-2006-Newsletter.pdf
Race Director
Joined: Dec 1999
Posts: 11,094
Likes: 990
From: Sierra Foothills CA
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
5 MOST and 5 LEAST Popular Corvette Model Years in History!
Joe Kucinski
