trans slipping after intake swap

Discussion in 'Technical' started by GTwannabe, Aug 25, 2006.

  1. GTwannabe

    GTwannabe Member

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    its a 72 maverick with 302/overdrive (aod) both out of a 85 f 150. the f 150 had an ECU but with a 2bbl factory.:huh: i thought computers were only for EFI. everything was working fine, other than dizzy probs. so he put a mallory uni lite on it and 4bbl (4300) and intake and now it only pulls in drive. and doesnt shift, takes off in 3rd and stays there. the car still has the ecu and there is a 4 wire sensor or selnoid on the drivers side the the trans that he had to unplug from the carb. is there a way he can take out the ecu but still use the trans? or cross the right wires to make it shift again? im no good with ecu's and just trying to help a neighbor with what was a fun:drive: maverick.
     
    GTwannabe, Aug 25, 2006
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  2. hotrod-daddy

    hotrod-daddy Member

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    It sounds to me like you/he needs to go with a manual valve body and get away from the electronics
     
    hotrod-daddy, Aug 25, 2006
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  3. Mavericknutt

    Mavericknutt member

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    Do you have the trottle pressure hooked up:?: very crucial on an aod
     
    Mavericknutt, Aug 25, 2006
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  4. elliot

    elliot Member

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    The ECU isn`t hooked up to the tranny at all , them four wires are just the nutral safty switch . Like mavericknutt said it sounds like you didn`t hook the "kick down rod" back up after the carb swap .
     
    elliot, Aug 26, 2006
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  5. Jamie Miles

    Jamie Miles the road warrior

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    Sounds to me like one of those early throttle body injection setups Ford had at first. Looks like a 2 bbl carb, but has a couple of injectors at the top. My grandpa has an '85 Lincoln Town Car that is the same way.
     
    Jamie Miles, Aug 26, 2006
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  6. 71gold

    71gold Frank Cooper Supporting Member

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    "them four wires are just the nutral safty switch"
    i was told they have the "backup light" wire there also :huh:

    ...:bouncy: ...
     
    71gold, Aug 26, 2006
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  7. elliot

    elliot Member

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    I`m sure you`r right frank but they have nothing to do with the tranny shifting .
     
    elliot, Aug 26, 2006
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  8. Derek 5oComet

    Derek 5oComet Tire burner

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    Sounds to me that the tv cable is out of adjustment or not hooked up.If it doesn't have a cable it may be a rod or linkage.Looks like a old style kickdown likage.If this is not properly adjusted you will fry the trans in no time at all.For a baseline adjustment push the rod or if it is a cable pull to the end of it's travel hold the throttle wide open.The rod or cable shoud push on to the carb linkage with no extra travel.You may have to do some fabricating if the two linkages don't line up when they are both wide open,due to the fact that the carb being used wasn't ment to be with an aod trans.Derek.
     
    Derek 5oComet, Aug 26, 2006
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  9. PaulS

    PaulS Member extrordiare

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    On the AOD the "kickdown" rod is actually a throttle pressure adjustment. You need to make sure it is adjusted properly or the tranny will burn to a crisp.
     
    PaulS, Aug 27, 2006
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  10. Rick Book

    Rick Book Member

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    Good point. I've heard too many horror stories about the TV Cable ("Throttle Valve"??) being out of adjustment and burning up the tranny.
     
    Rick Book, Aug 27, 2006
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