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1967 - 1972 F-100 & Larger F-Series Trucks Discuss the Bumpsides Ford Truck

Tranny problem?!!!

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Old Mar 3, 2005 | 11:40 PM
  #1  
aeroheadfordnut's Avatar
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Tranny problem?!!!

Im trying to make one truck out of two and I am almost there. I have a '68 and '69 F-100 360's in both. I have decided to go with the auto c6 tranny, one probem the thing sat for four years and does not want to shift out of first. I can manually shift into second but I would kinda like to get a little more out of this tranny. HELP!
 
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Old Mar 4, 2005 | 04:25 AM
  #2  
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I'm no expert on C6s but the rubber probably has gone bad from sitting. I suspect a rebuild is in order.

John
 
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Old Mar 4, 2005 | 08:08 AM
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You possibly have a bad vacuum modulator. Try replacing it and make sure the vacuum line from the intake manifold to modulator is good and attached. If that doesn't help then you probably have one or more valves in the valve body sticking which can be cleaned and freed up with B12 or similar product. You'll have to remove you tranny pan and valve body. Having a shop manual for the C6 will help here.
 
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Old Mar 4, 2005 | 10:45 AM
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Definitely start with the Modulator. Then make sure the vacuum line isn't cracked. Make sure you are pulling a vacuum with the engine running. Maybe you'll luck out.
 
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Old Mar 4, 2005 | 12:17 PM
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also check the kickdown linkage, it may be out of adjustment or if its not hooked up the lever on the tranny may be stuck in the wrong position.
 
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Old Mar 4, 2005 | 08:05 PM
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Thanks guys I will try all that I was just trying to not have a rebuild. The tranny had less than 5000 miles on it before it was parked. I will check back.
 
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Old Mar 28, 2005 | 07:36 PM
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well all I got it figured out and it screams.................I didnt even have a vacuum hose hooked up. Just a case of too many buddies helping and a lot of parts being thrown around. Thanks for the input
 
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Old Mar 28, 2005 | 08:19 PM
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nothin like a fix for free. like falling in a pond and finding a cold six pack in the water.
 
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Old Mar 28, 2005 | 08:35 PM
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4 cammer72, I want to know were your fishing. A beer per fish caught sounds good. We don't have many fish left in Calif unless you call mutations fair game.

Carl....=o&o....
 
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Old Mar 28, 2005 | 09:09 PM
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south cacilacki, fishin an weight liftin go together.
 
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