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UNOH Suspension Enthusiast
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okay, so we have a job in our shop were doing for a friend. he doesnt have much money so hes doing this as cheap as possible. we have a 93' transmission. everything is fine except the 3 prong plug in the 93' transmission. the 90' transmission had a 2 prong plug. the plug is for the overdrive. what do we have to do to make this work?
 

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I think that swapping the 90' 3-4 shift solenoid into the 93’ transmission is the best way to remedy this problem. Hopefully the old solenoid is still good.
 

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Upon looking at EEC diagrams, the 90's harness wires are red (VREF 5 volts) and Orange w/ yellow stripe (EEC #52 signal return).

If you look at the 3 terminals on the trans, they make a triangular pattern. Looking at the terminals, with the center terminal oriented as the topbof the triangle, that center terminal is the red VREF wire, and the CCO terminal #53 wire is to the right. I think you'd leave the terminal to the right un-connected.

that's my best guess anyways.
 
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