Where the hell does a T18 reverse light switch go!?!?

[Phils67]

I finally located my reverse light switch and wiring since I built the truck, idk, like 100 years ago. Never had the reverse light switch installed (youthful inexperienced stupidity I guess), so anyways I found where I stashed it
Now. Cover off the transmission, I don't see or recall where the hell the switch goes lol 67 truck with a T18B if someone can refresh me I'd be grateful. I'm not seeing it though. Pics or never existed!

[tgreese]

If present, 3.022-1.

T18shifttop.png

[Phils67]

Not on mine. I found that online also. And correction T18A if it makes a difference

[Phils67]

It obviously had it at one time otherwise I wouldn't have the switch kicking around but no idea where to install it.

[Stuka]

There was three styles to my knowledge. There is the one posted above.
There is one where the switch comes into the same area, but from the back (Ignore the blue square, I stole the photo from pirate):

hole.jpg

And then there was the T98 and early T18 that didn't have a backup light switch at all.

904EFE3A-A322-49AB-9712-CB944D786A2F.jpeg

[tgreese]

The switch, if present, is always activated by the shift rail. I don't know of any other way to activate backup lights automatically. All the linkage is there on the top of the transmission, and there is no other communication of which gear you are in. You pretty much can't have backup light activation without something to do with the shift top. A '68ish shift top will shift into R forward and away and have the switch at the position I show in the parts book drawing. Later tops from late '78ish on shift into R away and back, but the backup lights use the same type of switch.

If you shift forward and right, the switch is activated by the rail moving backward and left. That's where the hole is.

There will be a TCS (transmission controlled spark) switch on some models that has a single post and grounds in top gear. Suspect this is blue-outlined hole shown above.

With no place to screw into on the shift top, this is quite strong evidence that your shift top pre-dates standard backup lights (pre '67 or '68?) and the switch you found has some other history. Lots of older vehicles had backup lights either added or optional, and could be operated by a dash switch.

[tgreese]

Some of these oldest examples had a 4WD light. This was activated by the transfer case linkage. Possible that's the origin of your switch?

[Phils67]

There was three styles to my knowledge. There is the one posted above.
There is one where the switch comes into the same area, but from the back (Ignore the blue square, I stole the photo from pirate):
hole.jpg
And then there was the T98 and early T18 that didn't have a backup light switch at all.
904EFE3A-A322-49AB-9712-CB944D786A2F.jpeg

The lower pic is what mine looks like....but then since i nevwr bought one where did it come from lol?

[Stuka]

There was three styles to my knowledge. There is the one posted above.
There is one where the switch comes into the same area, but from the back (Ignore the blue square, I stole the photo from pirate):
hole.jpg
And then there was the T98 and early T18 that didn't have a backup light switch at all.
904EFE3A-A322-49AB-9712-CB944D786A2F.jpeg

The lower pic is what mine looks like....but then since i nevwr bought one where did it come from lol?

Most likely your 4wd light indicator. The D20's that had the indicator (not all do) have a similar switch installed into the shifter area. Though as I recall, it has a single stud in the middle, not the two pole connector like the reverse light switch.