bajachevy37

ok i have a 2002 chevy silverado 5.3. i did a tranny swap from the 4l60 to the 4l80. the tranny was looked in 3er gear. i had the computer flashed to a 2002 chevy silverado with a 6.0 motor and 4l80 tranny.. doing this let my tranny shift threw the gears fine. the problem i am having now is the truck shifts at 3000 rpms no matter what if im on it or just crusing it, it shifts at 3000. we had to add 2 pin to the computer for the second vss sensor. if you have any idea or have done this please help lol thanks

taws6m6

iTrader: (37)

You need a tuner. Tell them what it is doing and they should be able to fix it no problem

elias_799

iTrader: (8)

^^ he already programed the pcm to the 4l80e settings. that is exactly what the tuner does.

ineedamotor

tuning should fix it, still...

performabuilt

iTrader: (25)

You are looking at a tuning or sesor issue, As mentioned a tuner should be able to see why its happening and figure out what to do.