1980 F150 Transmission problems

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Apr 18, 2007 | 09:51 PM

bigjoejimbob

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1980 F150 Transmission problems

I have a 1980 Ford F150 ranger that is an automatic 4x4 pickup. The other day I was changing the front tires on it. When I went to jack-up the right side, I didn't have the jack centered right and the truck slipped off the jack after the wheel was 3-6 inches off the ground, thank god the lug-nuts were not loosen to much yet. Anyways after I got the tire changed I took the truck for a ride and that is when I discovered my screw-up. The auto-transmission did not want shift thru any of the gears in auto. But if I would manually shift it, it would shift between 1st and 2nd fine, but between 2nd and 3rd sometimes it would and sometimes it wouldn't shift. I am not certain what is causing this, so anything that you guys can think of to help me solve this problem I would appreciate.

Apr 19, 2007 | 12:25 AM

Franklin2

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From: Virginia

Check your vacuum lines, and especially the one that goes from the back of the intake manifold down to the rear of the tranny. It should have a vacuum line near the tailshaft area too.

Apr 19, 2007 | 09:08 AM

Redneck1465

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I agree with Franklin2, I had the same problem and was able to remedy this by reconnecting the vaccum line from the intake to the transmission.

Apr 19, 2007 | 01:00 PM