Shift light?
Junior User
Joined: Dec 2007
Posts: 89
Likes: 1
Are these aftermarket? IF it is stock than the shift light like some ford models had were mainly for telling you what is the economical time to shift..not much for paying attention to those than feeling the vehicles engine as it pulls as for how i shift, it works off a signal from the coil
Cargo Master
Joined: Dec 2004
Posts: 3,362
Likes: 22
From: Florence, SC
"Shift" light? Where is it on the cluster? Mine doesn't have one, nor a space for one. Are you in the right forum?
Across the top, from left to right, my lights are:
"EMISSIONS"
Left turn signal arrow
"FASTEN BELTS"
"HI BEAMS"
"BRAKE"
Right turn signal arrow
"4x4"
Across the top, from left to right, my lights are:
"EMISSIONS"
Left turn signal arrow
"FASTEN BELTS"
"HI BEAMS"
"BRAKE"
Right turn signal arrow
"4x4"
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Senior User
Joined: Jul 2010
Posts: 188
Likes: 1
From: Perry Florida
my "shift" light would be where your "emmissios" would be i guess, i dont have a emmissions light but my shift light is all the way to the left
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Posting Guru
Joined: Aug 2009
Posts: 2,271
Likes: 2
From: Mexia, TX
If I remember right, there is indeed an "Upshift" indicator on some of these trucks. As others have said it's to help get the best fuel economy by suggesting that you upshift when it lights.
It might be cool to try and wire up a factory Upshift indicator to come on with a programmable shift light-equipped tach or a standalone unit.
It might be cool to try and wire up a factory Upshift indicator to come on with a programmable shift light-equipped tach or a standalone unit.
Post Fiend
Joined: Dec 2007
Posts: 8,521
Likes: 16
From: Lost
IIRC, that light was only used for the 300 4 speed OD combo, and was set to come on at a rather low RPM. It didn't indicate the engine was reaching too high RPM, but when the best time to shift to a higher gear for max MPG. Under light throttle, it would come on at about 1500 RPM, where the engine was just starting to make it's best torque.
I also believe it only lasted 1 or 2 years before it got dropped. It was really unpopular. Most of them were unhooked during the truck's first couple months with the new owner. They were that annoying.....
I also believe it only lasted 1 or 2 years before it got dropped. It was really unpopular. Most of them were unhooked during the truck's first couple months with the new owner. They were that annoying.....
Lead Driver
Joined: Jul 2009
Posts: 6,477
Likes: 19
From: Sheffield, AL
Just as a reference, my son's 1984 has it in the far left position. My 1986 has the emissions light there. Both originally were with the "much loved and sought after" feedback carburetor system [hah!!] and were 4.9L with 4 speed OD.
