Results 1 to 2 of 2

Thread: 4l80 swap and now speedometer issues

  1. 01-30-2016 #1
    gm-only
    gm-only is offline
    Potential Tuner
    Join Date
    Jul 2014
    Posts
    2

    4l80 swap and now speedometer issues

    guys i did a segment swap and used the nelson racing conversion harness. the speedometer will not behave. it moves but its way way slow. is there something in the tune that could fix this?sharla stockish 4l80 trans tuning 2-2.24.hpt
    Reply With Quote Reply With Quote
  2. 01-31-2016 #2
    gm-only
    gm-only is offline
    Potential Tuner
    Join Date
    Jul 2014
    Posts
    2
    well im not sure if this is the correct way to do it but its the way that i did do it. i noticed that it was roughly half the speed of what the truck was really going. so i changed the vss pulse per mile. divided by 2. that got the speedometer working again and the error codes to go away. its still slightly off (4mph or so) but at least i know i can fool with the vss untill i get it right
    Reply With Quote Reply With Quote
« Previous Thread | Next Thread »