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Old 03-25-2012, 06:05 PM
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PapaBearYuma PapaBearYuma is offline
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C6 kickdown linkage

When I bought the yellow truck (79 F350 460 C6) it had a 4160 Holley, a 3/4" spacer and an Offy manifold. The kickdown lever wasn't even close to connecting.

I pulled the Offy, and the spacer, and installed a Performer and a new 4160 carb. The kickdown is closer, but still not quite right.

At rest, the kickdown pulls the throttle open and the idle is too high. When forced onto the shaft, the kickdown travel doesn't allow the carb to open to full throttle.

I tried the Holley kickdown extension, but that doesn't work either. At rest, the kickdown needs about a quarter inch more, and (following the accelerator arc) needs about an inch.

Any ideas (other than downshifting from the column) are greatly appreciated
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Old 03-25-2012, 06:47 PM
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I feel your pain. It's like the throttle has way more travel than the kick down lever does on the tranny? I built one out of 3/8 stainless tubing but it doesn't work perfect. Anything over 1/4 throttle and it kicks down. I wish I could help more, hopfully someone can shed some light on this situation.
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Old 03-25-2012, 06:52 PM
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Lokar makes an excellent cable to fit the C6. It is supposed to be a great improvement over the solid linkage.
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Old 03-26-2012, 10:47 PM
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Just a thought here, because they have so much travel and require a separate return spring, but most new holleys come with a little screw tieing the kickdown lever to the throttle arm, did you remove that? The KD linkage shouldn't even begin to move until half throttle or more usually.. If its not that then maybe something inside the trans is not permitting enough travel? It seems really weird that it would cause problems in both directions
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Old 03-26-2012, 10:55 PM
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Originally Posted by wdfp View Post
Just a thought here, because they have so much travel and require a separate return spring, but most new holleys come with a little screw tieing the kickdown lever to the throttle arm, did you remove that? The KD linkage shouldn't even begin to move until half throttle or more usually.. If its not that then maybe something inside the trans is not permitting enough travel? It seems really weird that it would cause problems in both directions
I was reviewing the instructions (what a concept!) for the Holley, and noticed that screw. I'll check it out this wkend - thanks!
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Old 03-27-2012, 10:12 PM
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Originally Posted by wdfp View Post
Just a thought here, because they have so much travel and require a separate return spring, but most new holleys come with a little screw tieing the kickdown lever to the throttle arm, did you remove that? The KD linkage shouldn't even begin to move until half throttle or more usually
Thank you!

I pulled the screw out, installed my perch kit, and the kickdown mounted right up!

Just got back from a little drive, testing out the passing gear - works great!

Last edited by PapaBearYuma; 03-27-2012 at 10:37 PM. Reason: fat fingers on little phone buttons
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Old 04-01-2012, 12:25 AM
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I'm glad it was something simple!
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Old 04-01-2012, 12:25 AM
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1966, 1968, 351, 390, c6, connect, f100, fe, ford, intallation, kick, kickdown, linkage, rod, transmission, windsor

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