1. Welcome To GMTruckClub.com!

    The #1 Chevy Truck Forum Online
    Online since 2004, we are the #1 Chevy Truck & SUV forum and user community. If you have any questions about your Chevy or GMC Truck, SUV or Crossover, or just want to connect with other GM owners and enthusiasts around the world, you've found the best place on the internet to do that.

    Join Today ~ It's Free
    Registering is Free and Easy! Hope to see you on the forums soon!

4L60E Nothing above 2nd gear

Discussion in 'GM Powertrain' started by smg427, Oct 12, 2009.

  1. smg427

    smg427 New Member

    I just installed a used 4l60e in my 1993 silverado and it has reverse, 1st, and 2nd. I removed the trans fuse and it started in 3rd with the shifter in 1st. The speedometer works fine and I cleaned all of the connections. Where do I go from here? Thanks

    I just pulled the codes; 66,67,81,82
    Last edited: Oct 12, 2009
  2. Joeairforce

    Joeairforce Epic Member 5+ Years 100 Posts

    Drop the pan...... I bet one of the harnesses are loose on one of the solenoids.....
  3. smg427

    smg427 New Member

    I dropped the pan and two of the plugs were loose. I put them on, filled it up, and still have the same problem. There is nothing after second unless I take the fuse out. After the test drive I checked for codes and there were none. Where do I go from here. Thanks
  4. Jimmiee

    Jimmiee Epic Member 5+ Years 1000 Posts

    Have you verified that there is voltage at the transmission?

    If it were my truck I would drive it with a scanner attached. Watching the scanner you can see if the PCM is commanding a 2-3 shift or not. If the PCM is commanding a 2-3 shift you may have a bad solenoid or a sticking valve. If the PCM is not commanding a 2-3 then I would be looking at the MLP data and the VSS.

    Without a scanner you really have no clue what the computer is doing.
  5. smg427

    smg427 New Member

    I found 12 volts at the shift solenoids and they both clicked when a ground was applied. Are there any other things I can check?
  6. Jimmiee

    Jimmiee Epic Member 5+ Years 1000 Posts

    A very common problem is harness goes open. You can check it with an Ohm meter and look for any open circuits. A scanner would allow you to do this from the comfort of the front seat.:glasses:

Share This Page