4L60E Tranny problem

Discussion in 'GM Powertrain' started by Kcolg, Mar 28, 2008.

  1. Kcolg

    Kcolg New Member

    I have a 1994 Chevy Suburban with the 4L60E transmission and it went out on me or at least I think it did.

    I stopped at a stop light and after taking off it slipped for a brief second and then took off again. I then stopped at the next light and when it was time to go, it would not. It acts as if it is in Nuetral. I still have reverse but no forward gears at all. No lound noises or anyother strange sounds just no more forward movement.

    Since it is an electonically controlled unit I was hoping it was just some selonoid or something? I am not used to this tranny at all so any help is greatly appriciated.
     
  2. Pete95Sierra

    Pete95Sierra Epic Member 5+ Years ROTM Winner 1000 Posts

    mine did that before I had it rebuilt but it never got to the point where it never went forward. It would go but than it felt like it would skip past second and go right to third or just sometimes be in neutral than engage. I think there is a solenoid that goes from neutral to 1, 1 to 2, etc. (but dont quote me on that) so u may have a problem with the neutral to 1 solenoid... someone should be able to hel u tho sorry i couldnt be more of a help
     
  3. Kcolg

    Kcolg New Member

    Thanks. Anyone else know or have some instie?
     
  4. tbplus10

    tbplus10 Epic Member Staff Member 5+ Years 5000 Posts Platinum Contributor

    The 4L60E uses a couple solenoids, so if 1/2 is out it should at least jump to 3rd gear. I wouldnt think all the solenoids would go at once, but stranger things have happened.
    Check the fluid first. Any burnt smells?
    At a guess it's time for a rebuild. The torque convertor is still working because you have reverse. Vehicles will sometimes move in reverse with a bad trans because reverse is a lower gear ratio and this makes it easier build inertia.
     
  5. 905

    905 New Member

    It sounds like you where sitting in my truck last week!!
    The exact same thing happened to me. I've got a 2010 5.3l and got it to the dealer 2 days before warranty.looking for any info or advise,the dealer told me after 4hrs of checks they found 2 qt low.the only thing they didn't do is try driving fwd
     
    Last edited: Mar 23, 2015
    RayVoy likes this.
  6. RayVoy

    RayVoy Rockstar 3 Years 1000 Posts

    That is a classic description of low fluid.
     
  7. BIGREDDADDY53

    BIGREDDADDY53 Rockstar 100 Posts

    I driving down the street and heard a load bang, By the time a got it back home I have no Park, Reverse, No burnt smell, , So I will check the fluid for filings and let you know to see what you think. Thanks, Eric
     
  8. RayVoy

    RayVoy Rockstar 3 Years 1000 Posts

    Sun gear
     
  9. the phantom

    the phantom Rockstar 3 Years ROTM Winner 1000 Posts

    Just as @RayVoy said its a classic example of low fluid. Reverse is usually the last to go.. If your fluid is fine it sounds like the bands are burned up. Usually when it slips just once its too late. I had one that slipped just once for a couple seconds due to a line blown and I pulled over, temporarily fixed the leak, filled back up and after that I had what they call a flare in between shifts. It was never right until I had it rebuilt a few months later.
     
  10. squatchy

    squatchy Active Member 1 Year 500 Posts

    x2 sunshell go boom.
     
    the phantom likes this.

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