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Transmission computer

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    #1

    Transmission computer

    93' lx 2door A/T been having problems with it lately like one day i start it it will be fine the next i go to start it and the park light and d4 light are both lit and wont shit at all i leave it sitting for 2-3 days then its fine so everytime i drive i start it up its hit or miss......i went to the junkyard yesterday and grabbed a 92 ex 4 door transmission computer just to try it...the plugs dont match up but all i had to do was turn them the opposite way upside down and it fit....its now driving fine d4 light blinked once it acted funny for like 10 mins i lost all hope but 15 mins later its like a brandnew car & ive been driving it perfect for the last 2 weeks....my question is can this damage anything?should i get an lx computer?
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    #2
    there is a thread on how to fix the TCU (automatic only). Or you can go to a junkyard and buy one for cheap too. I got 2 from the JY and fixed my old one with the thread into so now i have 2 back ups. Look up TCU repair on the search bar.
    10th Anniversary Accord.
    05 Audi A4 Ultra Sport 6MT.

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      #3
      Originally posted by 10thAnnivCB7 View Post
      there is a thread on how to fix the TCU (automatic only). Or you can go to a junkyard and buy one for cheap too. I got 2 from the JY and fixed my old one with the thread into so now i have 2 back ups. Look up TCU repair on the search bar.
      Since the TCU is a problem but I wonder if the ECU is like that too.

      Thanks.

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        #4
        If you didn't pull the battery cable to reset the ECU, it may have had residual errors from the TCU for the first 15 minutes. Open the old TCU and see if it is an easy fix and then you have a backup.

        But it should not damage the car to swap the TCU.

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          #5
          That D4 light is indicating an error code. Pull the code and fix the problem. Stop replacing your TCU. It could very well be absolutely fine. You're killing the messenger.






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            #6
            I had a bad shift lock solenoid take my TCU out, if I didn't fix it I would be replacing TCUs non stop. deevergote makes a good point.

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