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1G Autoswap No Reverse

Posted by evil_eagletalon, Jan 25, 2020

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  1. evil_eagletalon

    evil_eagletalon Proven Member

    80
    7
    Joined Jan 21, 2015
    Orange, California
    Whats up fam. So almost done wrapping up my auto swap on my 1990 talon awd. Fired it up yesterday and only enguages in drive.

    When shifting into reverse engine rpm doesnt not change. When put in drive rpms drop.

    It free revs in reverse. And when in drive it seems to not want to move forward much.

    NOTES: Manual diff is still on the car.

    Fourced four box controlled but i have not powered up transmission or shift box.


    Cant sleep thinking about this. Will my solenoids not being energized cause this or am i looking at a mechanical issue?

    Side notes: I replaced end clutches, welded center diff, added kiggly saddle, and installed a translab shift kit.

    Transmission was purchased so idk if it has been a ongoing issue.
     
  2. OH91awd

    OH91awd Proven Member

    715
    336
    Joined Sep 22, 2011
    chillicothe, Ohio
    could be a possible issue with the shift kit install. also the not wanting to move forward could be that with no power to the solenoids its sitting in 3rd gear.
     

    Drag Race Build 2K  17

    1992 Eagle Talon TSi AWD
    10.89 @ 125.67 · 1G DSM
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  3. nismojones

    nismojones Proven Member

    52
    12
    Joined Jan 10, 2008
    Eastpoint, Michigan
    Reverse is mechanical- it’s likely an internal problem. The first time I tore one down I mis-aligned the center-support O-ring that feeds it, couldn’t back it out of the garage LOL
     
  4. evil_eagletalon

    evil_eagletalon Proven Member

    80
    7
    Joined Jan 21, 2015
    Orange, California
    I didnt open up the transmission. Only shift kit and end clutches. The orings you speak of are on the front clutch drum right?
     
  5. evil_eagletalon

    evil_eagletalon Proven Member

    80
    7
    Joined Jan 21, 2015
    Orange, California
    That makes sense so its in 3rd right now.

    So should i remove the valve body?

    Wouldnt the pressure control solenoid need to power on? Or reverse absolutely all mechanical?
     
  6. OH91awd

    OH91awd Proven Member

    715
    336
    Joined Sep 22, 2011
    chillicothe, Ohio
    here found this post. tim says it best on things to check. theres an o ring that goes between the valve body and case. common thing to happen. ill try to find the picture of it to better explain that.
    edit. heres a link to that post that has pics
    https://www.dsmtuners.com/threads/help-no-reverse-after-rebuild.365973/

    1.png
     

    Drag Race Build 2K  17

    1992 Eagle Talon TSi AWD
    10.89 @ 125.67 · 1G DSM
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    1990TSIAWDTALON likes this.
  7. SasaniFab

    SasaniFab Freelancer

    2,185
    608
    Joined Dec 1, 2013
    danbury, Connecticut
    Had a customer with a similar problem, ended up being the valve body. He purchased the trans off me , I never opened it up but he had it built and it wouldn’t go into reverse of forward. I rebuilt another core and sent it to him. Trans shifts awesome now
     

    Street Build 3K  20

    1992 Eagle Talon TSi
    645 whp · 498 lb/ft · 1G DSM
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    1990TSIAWDTALON likes this.
  8. nismojones

    nismojones Proven Member

    52
    12
    Joined Jan 10, 2008
    Eastpoint, Michigan
  9. evil_eagletalon

    evil_eagletalon Proven Member

    80
    7
    Joined Jan 21, 2015
    Orange, California
    Thanks guys i am aware of the oring at topic. I have prior experiences with valve bodies and its something im sure i double checked on assembly. I guess ill be removing the valve body. And checking that oring and make sure assembly is correct.

    Can it be a issue with the end clutch i installed?
     
  10. motomattx

    motomattx Proven Member

    2,200
    849
    Joined Dec 9, 2010
    wampum, Pennsylvania
    You might have broken the manual valve when you installed the valve body!
     

    Drag Race Build 3K  24

    1995 Mitsubishi Eclipse GST
    fwd · manual · 2G DSM
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  11. evil_eagletalon

    evil_eagletalon Proven Member

    80
    7
    Joined Jan 21, 2015
    Orange, California
    Ill be removing the valve body for inspection
     
  12. SasaniFab

    SasaniFab Freelancer

    2,185
    608
    Joined Dec 1, 2013
    danbury, Connecticut
    The issue with his valve body from what I could see was the internals binding up. His core was exposed to water at some Point. The pistons weren’t able to move freely inside the bores. The core of was rebuilt with a shift kit by a reputable builder. His trans worked until he brought it back home. After shutting it off it wouldn’t go into gear or reverse
     

    Street Build 3K  20

    1992 Eagle Talon TSi
    645 whp · 498 lb/ft · 1G DSM
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  13. Bo0sTeD 4G63

    Bo0sTeD 4G63 Supporting Member

    322
    68
    Joined Aug 31, 2008
    Miami, Florida
    If you removed the valve body and it is not going into reverse then your problem is going to be that the o ring on the backside of the valve body is either missing or it has a bad o ring. If your car is not going into any gears or stuck you probably didn't align the manual valve when you re-installed the valve body back into the transmission. When you drop the pan look by the side and you should be able to see the valve.
     

    Street Build 1K  1

    1997 Mitsubishi Eclipse GSX
    awd · automatic · 2G DSM
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