Search results

  1. M

    4L60E no shift

    Lol sounds like even your beefed up built one wasn't enough to keep the 4L60e alive. I also suspected the VSS, But i can't seem to figure out why. I changed the sensor and the wiring is fine according to the meter... Still no change.
  2. M

    4L60E no shift

    I have a Chilton's and Haynes manual for the truck but cannot find enough info about the 4L60e in them. Haven't performed a line pressure check but i do know that when i unplug the 13pin connector to the tranny and drive it, it is running at full line pressure as it shifts from 1st to 3rd gear...
  3. M

    4L60E no shift

    The speedo is not working. According to my bench testing and my scanner the TPS works. I have a new one from my other truck i put in with no luck either. THe VSS works when i bnech test it, And i bought a new one just in case, The scanner does not show any VSS response. Chased wires back and...
  4. M

    4L60E no shift

    It only shifts when i put my scanner in control mode and use the shifting program to manually tell the solenoids to shift. Essentially I'm bypassing the PCMs logic shift points by hitting an upshift or downshift button. My understanding of this transmission since its electronic is that it will...
  5. M

    4L60E no shift

    I wish it was just a fuse. I haven't blown a single fuse, and power is getting to where its supposed to.
  6. M

    4L60E no shift

    I have changed the TPS as well as the VSS with no change. Checked the harness, cannot find an issues. I'm getting 12V at the pink wire on the ignition feed to the 4L60E connector. When I unplug the connector, the transmission is stuck in actual "limp" mode where i only have 3rd gear in drive...
  7. M

    4L60E no shift

    Right, i was also under the impression that "limp" mode was stuck in 3rd gear and i would presume throw codes. Im not getting a single ECM or TCM code. For that Pin E, should it have 12V while ignition on or is that an always hot 12V. And that would also be the same Pink ignition feed wire that...
  8. M

    4L60E no shift

    I know that the Pre '96 trucks are much different electrically from the '96 and up due to OBD2. I own a 92 that has a much simpler system. Just for fun, i traced the VSS circuit and found that the 2 wires lead directly to the PCM pins 29,30 on the C1 Blue plug. I have continuity between the...
  9. M

    4L60E no shift

    I replaced the ignition switch about a year ago with a high dollar one. Went down there to check again just to see. The connector still seems fine. All the connections seems sturdy. The pink ignition wire appears to be fine. Its not shorted or has any visible wear. From what i understand the...
  10. M

    4L60E no shift

    Every fuse in the vehicle is fine. Swapped all of the ECM, ENG and Trans fuses just in case. I have ran through the entire wiring harness up until it reaches the PCM and fuse block and found no issues. Checked all my joints and they still appear to be fine.
  11. M

    4L60E no shift

    I didn't take the transmission out. Only thing I did was take the pan off to change the filter and drain the torque converter. Never touched the PCM or the wiring while the engine was pulled. The grounds for the battery to body, battery to block, block to frame and frame to body are all new...
  12. M

    4L60E no shift

    I have a '96 K1500 with a 5.7L L31 and a 4L60E. Just finished putting in the motor after rebuilding it. While it was out I changed the filter and ATF and drained and refilled the torque converter. The transmission is now in some sort of limp mode. My understanding of a 4L60e is that "limp mode"...
  13. M

    Timing advance is extremely retarded on 96 5.7 vortec

    Okay so that's the difference between the crankshaft position sensor and camshaft position sensor right? I've pretty much tried everything to try and get rid of this code. I've replaced the timing chain which had a bit extra slack, took out the distributor and aligned it properly as well as put...
  14. M

    Timing advance is extremely retarded on 96 5.7 vortec

    I've got a '96 sierra with the 5.7 and it runs like crap. Idles alright but when I give it anything above around 1200 rpm it starts sputtering and misfiring. Exhaust backfires like a machine gun and it has a glass pack so i can hear it clearly. Good compression in cylinders, new wires and plugs...

Latest posts

Members online

Total: 1,426 (members: 34, guests: 1,392)

Forum statistics

Threads
64,252
Messages
1,389,888
Members
51,246
Latest member
robert2386

Share this page

Top