Results 1 to 2 of 2

Thread: 4L80 I/O RPM in scanner?

  1. #1
    Tuner BigKID's Avatar
    Join Date
    Oct 2005
    Location
    Panama City Beach, FL
    Posts
    53

    4L80 I/O RPM in scanner?

    In 4th gear, converter locked, I am seeing trans input rpm equaling output rpm which is greater than engine rpm. How can this be? Or is it a glitch in the scanner or pcm data? Has anyone else noticed this with a 4L80E?

    There is a scan showing this in a previous thread:
    http://www.hptuners.com/forum/showpo...37&postcount=1
    2000 Silverado, RCSB, 2wd - Built 371 / KB 2.8L / 4L80E - 11.18@123

    2012 Sierra Denali AWD - bolt-on daily driver and tow vehicle

  2. #2
    Advanced Tuner
    Join Date
    Mar 2005
    Location
    DFW
    Posts
    293
    You should log the Trans Turbine RPM