C-4 to 1991 aod transmission

Discussion in 'Technical' started by Ol Maverick Man, May 15, 2009.

  1. PaulS

    PaulS Member extrordiare

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    You really don't need the gauge block. If you set the "at rest" throttle pressure at 5 to 7 psi and make sure that at wide open throttle the cable is pulling the transmission lever all the way to the maximum then you are in good shape. If you get an aftermarket valve body then follow the instructions that come with it. To set the pressure on a stock AOD you only need a 0-15 psi gauge and a length of hose with a 1/8" male pipe fitting on the transmission end. It makes it easier to use the gauge if you install a 90 degree elbow in place of the middle plug before you install the transmission. Put the plug in the elbow and then remove the plug and install the hose and gauge to adjust the throttle pressure.
    If you wish to check maximum throttle pressure you will need a longer hose and a gauge that goes from 0 to 250 - 300 psi.
     
  2. cdeal28078

    cdeal28078 Member

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    I couldn't get the tranny to pull me out of the driveway using their directions and gauge. I looked online and it seemed like a lot of people were having the same trouble. I ended up setting the cable to where it was not tight or loose, more or less just no slack at all. Once I had it shifting I could tune it pretty well by the way it shifted and down shifted. It is better to be too tight than loose. Loose and you will burn up the clutches before you get half a mile down the road. I have not messes with one it several years though so don't listen to me as I might mess you up. These other guys have it figured out
    clint
     
  3. Ol Maverick Man

    Ol Maverick Man Member

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    Thanks to all the great information from this forum, I have a AOD in my Maverick in place of the C-4. Frank's crossmember looks like it came from the factory. A perfect fit Napa was able to easily convert the OEM flexplate number to one they had in the warehouse. Slight modification to the exhaust. Shortened the drivershaft one inch. It was necessary to
    remove the right header only. Thanks to all that replied to my questions.
    Caught a couple of dry days and was able to drive the car.
     

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