C-4 transmission won't shift into 3rd gear - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars
 
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post #1 of 4 (permalink) Old 10-07-12, 03:12 PM Thread Starter
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C-4 transmission won't shift into 3rd gear

Hello everyone! Hoping someone might be able to help me with my transmission problem.. I have a 1966 Ford Fairlane, 302 ci motor, and C-4 Trans. I just finished up buiding up my motor, and took it out for a drive, and it wouldn't shift into 3rd gear! 1st and 2nd was no problem, seemed normal, but 3rd never came. Even when i went trough the gears on the column, still couldnt upshift. Not sure what the problem is.

Checked my kickdown cable, wasnt stuck; that vacuum tube from my manifold, and i assume goes to my transmission, wasn't kinked or anyhing. Not sure what this vacuum line goes too. And the fluid level is good.

Any information would really help me out!

Thanks
Sean

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post #2 of 4 (permalink) Old 10-07-12, 04:36 PM
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Re: C-4 transmission won't shift into 3rd gear

The vacuum line from the engine goes to the vacuum modulator. If there were no problems with the transmission prior to, I'd be looking at the vacuum line and modulator first, if you don't know the history, try draining the tranny and changing the filter. If the transmission has a lot of miles and years on it since it's last rebuild, your orings mave have hardened after being idle for so long. They may free themselves up once warm, but your best bet is a rebuild of the transmission.

Ever notice that there's so many high performance parts available for GM products?

Did you ever think that maybe they NEED them?
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post #3 of 4 (permalink) Old 10-08-12, 03:17 PM Thread Starter
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Re: C-4 transmission won't shift into 3rd gear

You the man "CatSkinner"! That was the issue. I traced the vacuum line from my manifold down to the trans, and therubber vacuum hose popped off. I slid it back on, and took it for a ride, and it shifted great!

Thans again, youve helped me considerably with my crazy Fairlane.
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post #4 of 4 (permalink) Old 10-09-12, 07:27 PM
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Re: C-4 transmission won't shift into 3rd gear

Glad I could help.

Ever notice that there's so many high performance parts available for GM products?

Did you ever think that maybe they NEED them?
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