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Auto Tranny Computer Woes

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    #1

    Auto Tranny Computer Woes

    I have a 93 LX wagon. A while back the D4 light began to stay on. This would put me into "limp home mode. I had 1st,3rd and reverse gears. Manually shifted of course. I had 1st gear in the 1 gear position. I had 3rd gear in 2,D3,D4 position. Reverse in R. No transmission torque converter lock-up and no down-shifting Sometimes the interlock switch under the shifter would rattle. Sometimes the transmission would revert back to normal functioning.
    The TCU code for the original was 28100-PXO-A32

    I got a supposed "refurbished" TCU . This unit gave the exact same functionality as the original but the interlock switch never made a sound.
    TCU code 28100-PXO-A31 M1.

    Sent that one back and received another TCU. This one had no original Honda sticker but instead had a computer printed label saying 28100-PXO-A32. Who knows what unit this actually is. Anyway, this one gives me 2nd gear in gear positions 1 and 2. Also I have 4th gear in D3 and D4. reverse in R. Although it doesn't work properly the car is at least usable. In fact I love 4th gear without the TC lock-up.

    In the meantime I ordered another TCU off Ebay for like $50. It was labeled 28100-PXO-A31 M1. I installed this one and whet I turned on the engine it began to smoke. Yanked it and reinstalled the one from the above paragraph.

    I realize now that ANY TCU I get (unless it's new from Honda) will be a junk yard pull. Does anyone know which TCU units I can use in the wagon ? Can't seem to find complete information anywhere. Anybody know a good source for TCU's
    Tags: None
    #2
    checl the sensors that re on the tranny
    get 2 new ones
    shift selonoid
    Transmission Control Solenoid

    Comment

      #3
      I had the same issues with my TCU. I have a sedan. I even tried taking 1 of the TCU's I got to an electronic repair shop and have them try and repair it. Needless to say that failed as well. I finally found a place that I ordered a TCU from and it has been about a year now with no issues. I know I am building the suspence......Autocomputerexchange.com Even called them and they were great and very helpful! Good Luck!

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        #4
        I've been looking at the AUTOCOMPUTEREXCHANGE add on Ebay. My only problem with them is the $199 price tag for a junk yard pull. I may have to try them though. Thanks for the reference.

        Comment

          #5
          Np, I had called them cause I was also concerned about getting a junk yard pull but after talking with the guy there I felt allot better. I think they also give you a warranty on it to. Not sure but I thought it was for a few years, but double check and it came quick too. My cb7 is my daily driver and driving around in limp mode was killing me. When you order they send you shipping label to send back old one and give you a core fee back! They seemed legit and after my experiance with them and having no issues after install I was satisfied! Good luck!
          Last edited by JSCB7; 09-11-2010, 10:17 PM.

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            #6
            s light trans woes

            ok i scanned my tcu for codes read code 7 shift solenoid a shorted or open how do i fix this? were is it located and does ne one knw what could have caused this and were i can buy one auto zone does not seem to pull one up on there website?
            Better to have and not need , than to need and not have!
            Life is simple make choices and don't look back

            MRT http://cb7tuner.com/vbb/showthread.php?t=173251

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