46re acts like its in forward and reverse at same time

Transmission and Drivetrain Tech

  1. 1973dust

    1973dust FABO Gold Member FABO Gold Member

    Messages:
    94
    Likes Received:
    30
    Joined:
    Jan 12, 2011
    Location:
    Illinois
    Local Time:
    2:43 AM
    This is not an a-body related question, but it seems like the tech knowledge on this site about anything Mopar is the best you can find on the web. My son has a 2000 Ram 4x4 with a 5.9
    and a 46RE. The truck will not drive forward or reverse and will not even roll with the trans shifted to neutral. The engine is definitely under a load when trying forward or reverse. It will roll with the transfer case shifted into neutral. When shifting the trans into reverse or drive, it feels like a normal shift into gear. I'm hoping that we might get lucky and the problem could just be a stuck shift valve but I've got very little experience with trannys. Hoping one of you gurus can give me an idea what to look at.
     
  2. CudaFactHackJob

    CudaFactHackJob FABO Gold Member FABO Gold Member

    Messages:
    1,360
    Likes Received:
    479
    Joined:
    Mar 17, 2016
    Location:
    Hemet, Ca.
    Local Time:
    2:43 AM
    What's in the pan?
     
  3. 1973dust

    1973dust FABO Gold Member FABO Gold Member

    Messages:
    94
    Likes Received:
    30
    Joined:
    Jan 12, 2011
    Location:
    Illinois
    Local Time:
    2:43 AM
    Have not looked yet. We'll drop the pan tonight and expect the worst. I actually did get it to idle forward about 20 feet last night seemingly normally. Then after trying reverse, it would only drive forward with lots of throttle and was not smooth.
     
  4. Tooljunkie

    Tooljunkie King of cobble/master of the broken bolt FABO Gold Member

    Messages:
    15,788
    Likes Received:
    15376
    Joined:
    Jul 22, 2017
    Location:
    Manitoba
    Local Time:
    2:43 AM
    Its done. You should expect to find chunks in the pan. Course of action for me would be a rebuilt if truck is in decent shape, if rough around the edges i would think about finding a used one.
     
    • Agree Agree x 1
    • Tooljunkie

      Tooljunkie King of cobble/master of the broken bolt FABO Gold Member

      Messages:
      15,788
      Likes Received:
      15376
      Joined:
      Jul 22, 2017
      Location:
      Manitoba
      Local Time:
      2:43 AM
      Dont forget to pull drain plug on transfer case, it could be piled up. Also, i assume the truck will roll with it (t-case) in neutral?
       
    • fklskv

      fklskv Well-Known Member

      Messages:
      1,184
      Likes Received:
      628
      Joined:
      Aug 14, 2011
      Location:
      Lackawanna, NY
      Local Time:
      3:43 AM
    • 1973dust

      1973dust FABO Gold Member FABO Gold Member

      Messages:
      94
      Likes Received:
      30
      Joined:
      Jan 12, 2011
      Location:
      Illinois
      Local Time:
      2:43 AM
      Yes, it will roll with transfer case in neutral. T-case was my first thought but it is working properly.
       
    • 1973dust

      1973dust FABO Gold Member FABO Gold Member

      Messages:
      94
      Likes Received:
      30
      Joined:
      Jan 12, 2011
      Location:
      Illinois
      Local Time:
      2:43 AM
    • Loggato

      Loggato Well-Known Member

      Messages:
      212
      Likes Received:
      222
      Joined:
      May 28, 2019
      Location:
      Central Kansas
      Local Time:
      2:43 AM
      Sounds like when my old 93 GMC pooped it's 4L60E. It had just enough guts to get onto the ramps so I could change it out. Was definitely under a huge load but the truck would barely move.
       
    • fklskv

      fklskv Well-Known Member

      Messages:
      1,184
      Likes Received:
      628
      Joined:
      Aug 14, 2011
      Location:
      Lackawanna, NY
      Local Time:
      3:43 AM
      Had issues twice. The other day it stayed in second. Time Before it stayed in first.
       
    • 1973dust

      1973dust FABO Gold Member FABO Gold Member

      Messages:
      94
      Likes Received:
      30
      Joined:
      Jan 12, 2011
      Location:
      Illinois
      Local Time:
      2:43 AM
      Okay, thanks for everyone's input. Dropped the pan tonight and no huge chunks but lots of aluminum shavings. Something obviously is coming apart.
       
    • CudaFactHackJob

      CudaFactHackJob FABO Gold Member FABO Gold Member

      Messages:
      1,360
      Likes Received:
      479
      Joined:
      Mar 17, 2016
      Location:
      Hemet, Ca.
      Local Time:
      2:43 AM
      Use a magnet to make sure it's aluminum.
       
    • 1973dust

      1973dust FABO Gold Member FABO Gold Member

      Messages:
      94
      Likes Received:
      30
      Joined:
      Jan 12, 2011
      Location:
      Illinois
      Local Time:
      2:43 AM
      First thing I did. Its definitely non-magnetic. As far as the black crud they always have, it didn't actually look bad. Fluid looked decent also.
       
    • fklskv

      fklskv Well-Known Member

      Messages:
      1,184
      Likes Received:
      628
      Joined:
      Aug 14, 2011
      Location:
      Lackawanna, NY
      Local Time:
      3:43 AM
      Not my money but if the fluid is good and not burnt up I would try replacing the modulators and solenoids.

      Crap in the pan is not unusual.
      Worst that can happen is you reuse them on a rebuild. IMHO
       
    • 1973dust

      1973dust FABO Gold Member FABO Gold Member

      Messages:
      94
      Likes Received:
      30
      Joined:
      Jan 12, 2011
      Location:
      Illinois
      Local Time:
      2:43 AM
      Some of the aluminum pieces are 3/8 to 1/2 inch long and a lot of them are 1/8 ish. Does stuff like that show up in a properly operating trans? If it is dead, we don't intend to rebuild. We'll look for a used trans. Truck not worth putting the amount of money into that a rebuild would cost. I'll try to take pics of debris and post after work today. Thanks again for the input.
       
    • CudaFactHackJob

      CudaFactHackJob FABO Gold Member FABO Gold Member

      Messages:
      1,360
      Likes Received:
      479
      Joined:
      Mar 17, 2016
      Location:
      Hemet, Ca.
      Local Time:
      2:43 AM
      Sounds like planetary pieces. But here's the thing. That trans is a complicated piece of machinery, but the front half is generic old 727 that hundreds of people on here are very very familiar with. If the overdrive is destroyed, I say forget it; it's beyond your capabilities. BUT, I would at least drop out the pump and the two front drums for an inspection before you go with a used unknown. One step at a time. We don't make decisions prematurely that aren't even required yet. Oh, and we like pics...LOTS of pics.
       
    • 1973dust

      1973dust FABO Gold Member FABO Gold Member

      Messages:
      94
      Likes Received:
      30
      Joined:
      Jan 12, 2011
      Location:
      Illinois
      Local Time:
      2:43 AM
      DSC05403.JPG DSC05404.JPG DSC05407.JPG DSC05405.JPG
      Ok, here are some pics of the debris. Ignore what appears to be small rocks. Oil-dry got in the mix somehow. The bottom pic is all magnetic crap. Largest piece is about a 1/4" square. The magnet is about 1 1/4" dia. for size references.

      I also got a better description of what happened from my son. Some of it will be a repeat.

      He noticed a "jerk" pulling into his girlfriends driveway. He put truck in reverse and backed up about 10 feet and then pulled forward. Said it seemed fine.

      Later that night, got in to come home and said when he shifted into reverse it made a loud bang or pop. Tried to back up and truck would jump a little when revved. Said he only tried a couple times. Shifted back into D and tried to pull forward with same result. Shifted to 2nd and was able to pull forward about 20 feet to get out of middle of driveway but took lots of throttle.

      The truck will not roll with transmission in neutral. Acts just like its a manual with the clutch out and in gear. It will roll with the transfer case in neutral. I tried reverse again at home but would not move. I then shifted to D and was able to idle forward to the end of the driveway like normal. I then tried reverse again with same result as before. Back to D and then would only move with heavier throttle than normal.
      DSC05406.JPG
      Also, the two "levers" in this picture both have about 1/4" free play up and down. Not sure if that tells anything good or bad. I believe the one on the left is the low/reverse band adjuster?

      Hopefully some of my ramblings have made sense.
       
    • Northern Grit

      Northern Grit Well-Known Member

      Messages:
      156
      Likes Received:
      199
      Joined:
      Jul 21, 2020
      Location:
      Michigan
      Local Time:
      3:43 AM
      The 1/4" play is not unusual for a used trans. The description of events really sounds like a broken planetary carrier or in an extream case a blown out rear spragg. But what's in the pan is enough to indicate that that trans is now a core, the only reason to go through it would be only curiosity, the part costs add up so quick that it's not reasonable to try and save it vs installing a used (sometimes with a warranty). Also replace the torque converter.
       
      Last edited: Sep 15, 2020
      • Disagree Disagree x 1
      • 408 swinger

        408 swinger FABO Gold Member FABO Gold Member

        Messages:
        1,860
        Likes Received:
        1588
        Joined:
        Nov 12, 2010
        Location:
        Iowa
        Local Time:
        2:43 AM
        Direct drum piston return spring failure. Combined with fried clutch plates.
         
        • Agree Agree x 1
        1. This site uses cookies to help personalize content, tailor your experience and to keep you logged in if you register.
          By continuing to use this site, you are consenting to our use of cookies.