And if I was replacing the one solenoid, would it be wise to change all the others? Is there a difference between Dark Sky Metallic (GMC) and Shadow Grey Metallic (Chevy)? Need Illustrated parts drawing to assist you in identification of the parts that you might need. I think yours will use the 0.54VDC spec +/-0.02VDC. If hooked at the yellow wire crank the engine you should have 5V. Digital Ratio Adapter Controller (DRAC) has been calibrated to my exact Gear ratio and Tire size. If 4th is commanded and not going in, then there is an issue either in the valve body not sending pressure or in the actual overdrive clutch itself. I had to drill the screw heads off so I could replace solenoids. I have to find a guage block. Come join the discussion about duramax engines, performance, builds, modifications, classifieds, troubleshooting, maintenance, and more! An island in south west pacific, cl. We wanted to took a closer look at it. When it went out it made a clunk sound then would not move. Ok, you have a few things to check first before assuming the tranny is the problem.
The 4L80E transmission problems include the following: Erratic shifting: The 4L80E had shifting problems as a result of a failed throttle position sensor or input/output speed sensor. Transmisison needs rebuilt. I know check grounds but what else should I investigate? Hope this helps, let me know how it comes along.
It runs fine when cold except for a hard 1-2 shift but when it warms up I loose over drive. Powered by Invision Community.
Not even the Super Shifter or Tech II can do this. The 4L80E Transmission system is equipped with a computer called the Transmission Control Module (TCM), located in the left/rear passenger seat compartment which interprets, ana- ... transmission problem. I havne't fixed the problem yet, but I have made some progress and crossed a lot of things of the list of possible causes. I have a 93 GMC 2500 2wd with 4L80E transmission. This topic is now archived and is closed to further replies. Transmission and converter comes with a one year unlimited mile warranty extended warrantys are available! Adjust the TPS to a reading that matches the spec by +/- about .02VDC (that's what the specs are as far as I know) and tighten the TPS back down. It should lock up in both 3&4. The block is for the diesels. First off it takes twice or more pressure to have reverse gear than the forward gears. Does this mean the tranny is needing rebuilt? http://www.transchool.eustis.army.mil/ADSO...wnload_page.htm. Any help would be appreciated. http://www.thetruckstop.us/forum/showthread.php?2657-A-little-help-here&p=50700#post50700, New Caledonia. It will manually go into first. These tell your TCM What position your throttle is at and how fast the engine is spinning. Even your brake switch is wired into the TCM. We have tons of knowledge here for your diesel truck! Put a voltmeter on the a&b terminals and adjust it with the key on to .54 volts. 3L 5 speed 1966 Mustang 200 I6, auto, 4 wheel disk, power brake retrofit, Corvette master. Still clunks like its in reverse but no movement. In 20 seconds you can become part of the worlds largest and oldest community discussing General Motors, Chevrolet and GMC branded pickups, crossovers, and SUVs. It will unlock for about a second and then lock back up. I don't have any sensors behind the damper or around the timing cover. On the upside, after all this work the truck is running and shifting better than ever, but the Torque Converter problem still exists. Welcome! I replaced the Throttle Postition sensor about 2 weeks ago. My 93 2500 had the exact same problem. Take a look at it all there is some good info on all the different switches and modules that effect the shift pattern of the 4L80.
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