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#595203 Tue Nov 24 2009 04:00 PM
Joined: Aug 2008
Posts: 230
old dog Offline OP
Shop Shark
did they ever have back up lights on a 61 gmc with a 4 speed trans .if so how was it hooked up ,if not how can they be hooked up ?thanks

old dog #595206 Tue Nov 24 2009 04:15 PM
Joined: Jul 2001
Posts: 3,904
Master Gabster
first item here - mechanically actuated by the shifter


Moved over to the Passing Lane

"When we tug a single thing in nature we find it attached to the rest of the world" John Muir
"When we tug a single thing on an old truck, we find it falls off" me
Some TF series details & TF heater pics & Rust-a-holics Unanimous parking lot
squeeze #595269 Tue Nov 24 2009 08:11 PM
Joined: Feb 2008
Posts: 14
Wrench Fetcher
Incorrect Bill. That is not a switch for a 4 speed.

Here is the original GM mechanical back up light switch that mounts on the 4 speed shifter.

MarvelMysteryEar #595532 Wed Nov 25 2009 03:24 PM
Joined: Aug 2008
Posts: 230
old dog Offline OP
Shop Shark
that had me stumped ,and now this clears the fog away from my brain !i wonder if this is still available with the harness ?

old dog #595746 Thu Nov 26 2009 03:56 AM
Joined: Nov 2002
Posts: 1,008
Shop Shark
I've heard reports that the 67 SM420 had a reverse switch, or are the links "Mother Trucker" switch it?


I don't own a vehicle that isn't old enough to drink.
LGriffin #595773 Thu Nov 26 2009 05:25 AM
Joined: Feb 2008
Posts: 14
Wrench Fetcher
That GM backup light switch posted by M.T. will work on any SM 420 4 speed from 1947 to 1967.

We just thought it was important to dispel the mis-information posted on this subject earlier. dang

Moderated by  Rusty Rod 

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