C-6... Raising shift points...?
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Elder User
Joined: Jun 2003
Posts: 686
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From: Edgewood, Wa
C-6... Raising shift points...?
Hey guys, is it possible to raise the part throttle shift points on my C-6?
Its a 74 F100 4x4, 390. I ask because it seems to shift into 3rd before
20 mph, unless I am more aggressive with it, and then I get the wrath of my Locker(which is cool sometimes, but not all the time) Anything I can do? Thanks!
Its a 74 F100 4x4, 390. I ask because it seems to shift into 3rd before
20 mph, unless I am more aggressive with it, and then I get the wrath of my Locker(which is cool sometimes, but not all the time) Anything I can do? Thanks!
Posting Guru
Joined: May 2003
Posts: 1,525
Likes: 3
C6 shift points are easily changed. If the vacumn modulator has a screw inside the tube that the vacumn hose is hooked to, just screw the adjuster screw in a little. 1 turn should raise the shift points about 5mph or so.
If there is no adjusting screw in the modulator. There is a small rod behind the modulator. Remove the modulator (you might lose a little fluid) remove the rod, buy or make a slightly longer rod. The rod kits probably are not available anymore but a piece of 1/8 welding rod will work. Make it longer by 1/16" or so and try it. Longer will make the transmission shift later, shorter is earlier.
If there is no adjusting screw in the modulator. There is a small rod behind the modulator. Remove the modulator (you might lose a little fluid) remove the rod, buy or make a slightly longer rod. The rod kits probably are not available anymore but a piece of 1/8 welding rod will work. Make it longer by 1/16" or so and try it. Longer will make the transmission shift later, shorter is earlier.
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