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Auto Trans Not Shifting!

Posted by Bluefire16, Jan 6, 2011

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  1. Bluefire16

    Bluefire16 Proven Member

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    Grand Rapids, Michigan
    OK guys, so originally i had no Reverse or gears werent changing. Well i seem to have plugged in the wrong plug (i put the CC instead of the TRANS!) anyways...

    I have Reverse now! But the gears still wont change, even with the road surge box.... what should i check now!?
     

    Street Build 1K  1

    1997 Mitsubishi Eclipse GSX
    396 whp · 380 lb/ft · 1G DSM
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  2. Absit

    Absit Proven Member

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    Joined Dec 19, 2002
    Davenport, Iowa
    Can you shift manually with the shifter? How's your fluid level and condition? Are there any TCU codes?
     
  3. BlackMount

    BlackMount Proven Member

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    Joined Jan 20, 2010
    Monroe, Wisconsin
    does drive work at all. if TCM or TCU or whatever goes bad or has a major malfunction, it goes in to limp mode which will only allow you to use P, R, and 3rd gear of drive and shifts will be very very harsh.
     
  4. Bluefire16

    Bluefire16 Proven Member

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    Grand Rapids, Michigan
    Ok...here is the whole run down. 2 years ago, my tranny went. I had it rebuilt, shortly after my car went into limp mode.

    Brought it to tranny shop, physically "hot wired" the trans, and determined that my TCU was bad. Ordered one...it to was bad. So i got the road surge shiftbox, which allows you to bypass the "limp mode" and continue to drive.

    Been fine for 2 years now, my hg blew last week. Pulled the head, replaced it, car started fine. Go to back it up, NO reverse. The CAR DRIVES, however, it feels like its only in 3rd.

    Well find out i put in the wrong plug to the trans connector. (CC is the exact same plug as the trans plug)

    I change around the plugs, and now i have REVERSE! But drive still wont shift. And i am trying to do this with my roadsurge box.

    I have checked all my wires and even reconnected some. Even put in another "bad" TCU thinking if the other one was just completely fried.

    I have some code thrown but cant check it.
     

    Street Build 1K  1

    1997 Mitsubishi Eclipse GSX
    396 whp · 380 lb/ft · 1G DSM
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  5. Absit

    Absit Proven Member

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    Joined Dec 19, 2002
    Davenport, Iowa
    Have you gone through your fuses and relays to see if that's why you have "bad" TCUs?
     
  6. Bluefire16

    Bluefire16 Proven Member

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    Grand Rapids, Michigan
    My old trans shop bypassed all the relays, we "hot wired" the car like i said. We put wires directly from the TCU to the trans, and the TCU wasnt picking up the codes.

    What relays? Only 2g NT autos have a automatic relay as far as im aware. Also all my fuses are fine.
     

    Street Build 1K  1

    1997 Mitsubishi Eclipse GSX
    396 whp · 380 lb/ft · 1G DSM
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  7. BlackMount

    BlackMount Proven Member

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    Monroe, Wisconsin
    read why i highlighted Your TCU is bad.
     
  8. Bluefire16

    Bluefire16 Proven Member

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    .... are you familiar with the road surge box?

    IT BYPASSES the TCU and tells the TRANSMISSION to shift. So for 2 YEARS i have been using my roadsurge box WHILE my TCU was BAD.
     

    Street Build 1K  1

    1997 Mitsubishi Eclipse GSX
    396 whp · 380 lb/ft · 1G DSM
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  9. the_mork

    the_mork Moderator

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    Eau Claire, Wisconsin
    Reverse is entirely mechanical but can be affected by the tcu such that it will hesitate to engage or not at all. This is an issue when the pressure control solenoid is activated so the easiest way to check if the issue is electrical is to look for the plug coming out of the front of the transmission just above the pan which is 4-pin. When you find it unplug it and see if the car has reverse and 3rd. If so then the issue is likely electrical at least to some degree.


    I've had two cars refuse to shift out of first. The first was my 2g which was fixed when I cleaned the valve body, and the second is my current talon which I'm still working on fixing. I'm assuming that the same thing will fix it but I'm waiting on a shift kit as long as I'm going to be in the tranny anyway.
     

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    1997 Mitsubishi Eclipse Spyder GST
    automatic · 2G DSM
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  10. Bluefire16

    Bluefire16 Proven Member

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    Yea, i no exactly what plug you are talking about. That only fixed my reverse issue.

    Where should i look electrically for the drive gears? I have checked all from my shift box to the TCU and they are all good.
     

    Street Build 1K  1

    1997 Mitsubishi Eclipse GSX
    396 whp · 380 lb/ft · 1G DSM
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  11. white92talontsi

    white92talontsi Proven Member

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    Fayetteville, North Carolina
    put a known good TCU in the car as has been mentioned.
     
  12. the_mork

    the_mork Moderator

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    Eau Claire, Wisconsin
    Not sure where else to look electrically, I suspect the issue is physical being either a dirty valve body, or a bad clutch pack (rolled seal, bad valves). You can also test the solenoids and pulse generators. I know the info for doing that is out there but you'll have to search for it.
     

    4K  0

    1997 Mitsubishi Eclipse Spyder GST
    automatic · 2G DSM
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  13. BlackMount

    BlackMount Proven Member

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    Monroe, Wisconsin
    Probably your issue right there.

    That or try replacing the soleniods.


    Honestly, for the time and money you probably spent on attempting to fix this and dealing with related auto transmission issues you probably would have been better off just swapping to a manual transmission.

    it took me about 2 days to decide it wasn't worth the effort to fix my auto tranny on my car, picked up entire swap for 150$ including gear oil + Clutch.
     
  14. Bluefire16

    Bluefire16 Proven Member

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    And after everything... i paid $125 for the box, and thats it so far.


    ...how in the world did you get a manual tranny and cluth for 150?
     

    Street Build 1K  1

    1997 Mitsubishi Eclipse GSX
    396 whp · 380 lb/ft · 1G DSM
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  15. the_mork

    the_mork Moderator

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    Eau Claire, Wisconsin
    Also many people prefer an automatic transmission, faster more consistent shifts make them awesome for the strip while manuals have their issues as well, not the least of which is that they are weak and if the OP ever pushes that 20g to the limits then he might well end up going through manual transmissions very quickly.
     

    4K  0

    1997 Mitsubishi Eclipse Spyder GST
    automatic · 2G DSM
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  16. BlackMount

    BlackMount Proven Member

    803
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    Joined Jan 20, 2010
    Monroe, Wisconsin
    not just manual tranny n clutch

    I got

    OEM Turbo Clutch (Used plate w\ new disc)
    7 Bolt flywheel
    Starter
    Clutch Pedal assembly
    Clutch master Cylinder
    Clutch Hydrualic line
    Slave Cylinder (new)
    Turbo (F5M33) Tranny
    Shifter Housing
    Shift Linkages w\ Brackets
    Transmission Mount
    and fluids.

    Also got 2 Epic shift knobs! 1 which is axle nut deep socket, and the other is a intake cam off n\t 4g63 that I cut in half, threaded right onto my shifter housing :D

    also got a bunch of other stuff but that's outside the 150$

    Intercooler, IC plumbing, 450cc Injectors, 2G Turbo Manifold, Big Brake kit. Turbo Oil Pan, Turbo MAF, Turbo ECU, and Turbo Throttle body. wanna say I spent 200$ on that stuff listed.


    It's all about knowing people and being a good hustler.

    only example of that that' I've seen is my friend Matt's 800hp AWD. he goes through quite alot of trannys and related components, but that's 800hp, actually twisted his crank, and made it crack almost all the way through one of the journals.

    and auto sucks for me because I'm more about turns which auto sucks for.

    Anyways go to your local pull yard and snag the valve body and or soleniods, and see if that fixes anything.
     
  17. BLINKY619

    BLINKY619 Proven Member

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    word....!!!

    LOL
     

    622  0

    1997 Mitsubishi Eclipse GST
    manual · 2G DSM
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  18. Bluefire16

    Bluefire16 Proven Member

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    Joined Mar 30, 2007
    Grand Rapids, Michigan
    I have some friends with connections so im brining the car to a shop to get looked at... i just cant deal with this car at the moment.

    I help run a cafe with my mother. We own it, and right now times are VERY tough, and im just to stressed out and cant handle it. So i think im just gona suck up the cost and bring it in, at least get the tranny drained and flushed.
     

    Street Build 1K  1

    1997 Mitsubishi Eclipse GSX
    396 whp · 380 lb/ft · 1G DSM
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  19. oVaBoost

    oVaBoost Proven Member

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    Tama, Iowa
    one of your hot wires could of came apart? sometimes stuff like this happens trace the wires
     

    304  0

    1991 Plymouth Laser RS Turbo
    · 1G DSM
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  20. Bluefire16

    Bluefire16 Proven Member

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    Grand Rapids, Michigan
    We didnt leave the hot wires in, it was just to check, and trust me i feel i have gone over EVERY connection 3 times now
     

    Street Build 1K  1

    1997 Mitsubishi Eclipse GSX
    396 whp · 380 lb/ft · 1G DSM
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  21. jrohner

    jrohner Proven Member

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    Willmar, Minnesota
    And a manual trans is trouble free? I wish. No offense but this is crappy "advice".
     

    2K  0

    1991 Mitsubishi Eclipse GSX
    11.415 @ 119.59 · 1G DSM

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    1998 Mitsubishi Eclipse GSX
    414 whp · 459 lb/ft · 2G DSM
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  22. BlackMount

    BlackMount Proven Member

    803
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    Joined Jan 20, 2010
    Monroe, Wisconsin
    not necessarily but there's alot less to randomly stop working from doing a head gasket swap XD considering a a manual transmission is almost pure mechanics... other then what? the reverse switch?
     
  23. oVaBoost

    oVaBoost Proven Member

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    Tama, Iowa
    Could your transmission solenoids gone bad I have heard that the 2gb auto trans have issues, like my buddies gst auto his overdrive doesnt work and sometimes shifts funny a guy that messed alot with 97-99 dsm's auto fwd and awd have had issues with the tranny's he told me the solenoids inside the trans burn up and you will lose some gearing or with will run like crap. If you have gone through everything it could be something inside the trans. "hope this helps"
     

    304  0

    1991 Plymouth Laser RS Turbo
    · 1G DSM
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  24. the_mork

    the_mork Moderator

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    Eau Claire, Wisconsin
    2g auto transmissions are almost the same as 1g transmissions (plus TC lockup) and they are largely problem free except for end clutch issues which I would be almost certain is the problem that your friend is having with the no OD car.
     

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    1997 Mitsubishi Eclipse Spyder GST
    automatic · 2G DSM
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  25. EagleTalonTim

    EagleTalonTim Proven Member

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    Brighton, Tennessee
    Hey, This is Tim from RoadSurge.....I know this thread is a little old, but from what I have read, you still have not found a fix for your transmission. With having the forward gears only and no reverse, it does not appear to be a TCU problem at all. I have no TCU in my car at all and I still have reverse. You should be able to completely remove the TCU out of the vehicle just to ensure your TCU is not sending a signal to your pressure control solenoid when you put your shifter in reverse which would make it seem your reverse is gone.

    If that does not fix the problem, then you may have something messed up inside the transmission. Since first gear and reverse share the same clutch pack, do you notice any delay before first gear kicks in from a dead stop? If so, you may be losing fluid pressure to your clutch pack usually caused by a bad O-ring or seal. Not sure how deep you have ever tore into a transmission, but the center plate inside the transmission that separates basically holds all the clutches in place has an O-ring sealed port through the middle of it to allow fluid to get to the first gear clutch pack which also controls reverse. If either of the 2 O-rings are bad, you will not have reverse.

    You can also check your shifter for adjustment to ensure that when the shifter is in reverse the shifter link is still being depressed. In my 1g, There is a small 1/2" round metal button under the shifter which is only pressed when in P, R, and N. I am not sure what the exact position is for the reverse to be inline but that is one other thing to look at.
     

    722  0

    1993 Eagle Talon TSi AWD
    16.191 @ 86.250 · 1G DSM
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    Maxthepersonz likes this.

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