Question about 1991 Mitsubishi 3000GT

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My 3000gt is stuck in 3rd gear why? this is a automatic

Everything works great it will start in 3rd and never shift out or up or down to any onther gear..but still drives fine. just a little slow of the line now.
please help...
thanks kevin.. of colorado

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  • 4 more comments 
  • Neil Ally Jan 19, 2009

    i have the same problem! just got the car so i havn't experienced 1st and 2nd gears yet!! Reverse is working too. However, when i put it into reverse there is quite a clunk as it goes into gear. so i am going to change the oil and filter, by the way, does anyone know where the trans fluid filter is pls!

    also research into this has pointed to the "tcu" which, due to poor capacitor

    quality can put the car into "limp mode" this is why it is in 3rd. so you can get home or to a garage.

    There are people out there who can repair these, as they are v. expensive.

    all i can say now is i hope the fluid and filter works!!!!!

  • trendstar Jan 28, 2009

    I have the same problem. Its a 93 GTO Auto. The gearbox turned into a box of pieces due to the gearbox ecu failing (I think). I had a replacement gearbox and transfer box fitted, plus a replacement tcu. The car drives fine but is stuck in 3rd gear limp home mode. Reverse works fine also. Does anyone know where I can get this repaired? Thanks!

  • rampantro867 Apr 09, 2009

    1991 auto. gto same problem,no noticable gear change,no kickdown help!

  • Roger H Apr 15, 2009

    My 1991 Mitsubushi GTO has been experiencing the same thing since we bought it. The previous owner changed the transmission and told us it needed a replacement transmission control module. The TCM was replaced with a used one and worked for a few weeks and then stopped working again. I am looking to purchase a rebuilt TCM and see what happens. I also wonder if it could be caused by the engine control unit. I have read where they have been issues with older car models.

  • mikelbolton May 11, 2010

    Is the Check engine Light illuminated?

  • yadayada
    yadayada May 11, 2010

    Has the transmission ever had the fluid and filter changed?



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Your transmissions need to be service (fluid and filter change) and possibly a TCU replacement. Do NOT go to a dealer. Instead, look on ebay or craigslist for part outs. Transmission control units can be expensive but that is most likely the problem if you already changed ur fluid.

Posted on Jun 25, 2009

  • Trevplum Jan 28, 2012

    Where is the tuc cheers


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I have a 1992 gto stuck in 4th gear and it wont go up or down gears it drives but bad at junctions

Posted on Jun 02, 2009


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