Author
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Topic: C-4 not down shifting
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My 66 coupe Journeyman Posts: 41 From: Fort Bragg, NC Registered: Feb 2004
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posted 05-04-2004 08:35 AM
I went to pass someone the other day and really needed to get around fast and my tranny didn't kick down a gear. You can floor it and it won't drop a gear. It has 15 lbs of vacume. What next?
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whiteknight289 Gearhead Posts: 1273 From: Wheaton, IL, USA Registered: Mar 2004
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posted 05-04-2004 12:31 PM
Your 66 should use a cable to kick-down the transmission. At the bottom of your accelerator linkage against the engine side of the firewall you should see a hole for the cale to mount to, or maybe even a rusted piece of the old cable. This connects to a small lever on the shift arm of the transmission. When the accel linkage is almost at the end of its travel the cable should tighten up and pull the little shift lever forward.
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67nightmare Gearhead Posts: 118 From: rose hill, ks, usa Registered: Mar 2004
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posted 05-04-2004 11:24 PM
It might be a vacuum leak at the tranny. On my 70 model C-4 that was the problem. There is a vacuum port on the right(?) side by in about the middle of the tranny, you can't miss it, make sure there is a line hooked up to it. AND DON'T DRIVE IT LIKE THAT, if you can help it. That tranny will be $hit if you drive very long on it.
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SteveLaRiviere Administrator Posts: 42859 From: Saco, Maine Registered: May 99
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posted 05-05-2004 07:04 PM
Not downshifting won't hurt it, just lug the engine a little and slow acceleration a bit. Sounds like just a little linkage adjustment needed like Whiteknight stated. ------------------ '70 Mustang Mach 1 351C 4V/FMX/3.25 Open '70 Mustang Convertible 250 I6/3 speed/2.79 Open '72 Mustang Sprint Hardtop 351C 4V/FMX/4.30 Trac Loc '94 F-150 XL 5.8L/E4OD/3.55 Limited Slip
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My 66 coupe Journeyman Posts: 41 From: Fort Bragg, NC Registered: Feb 2004
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posted 05-06-2004 03:35 PM
Thanks guys my linkage was way out of adjustment. How does that happen?
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