ryany

iTrader: (15)

I installed a holley dominator on my car that has a 4l80 when you put it in D it shows park on the computer. Won’t shift it’s like it is stuck in limp mode has anyone had this issue?

truckdoug

iTrader: (25)

yeah i'd bet $50 your trans harness is mis-pinned.

email holley tech for a full size color png file of the trans harness and use a vom to tone it out. you probably have some wires to the pressure switch manifold changed around. the holley stuff is awesome but the harnesses are .... less than stellar

ryany

iTrader: (15)

10/4 man I shoot a email and see if they will do that for thank you!

Old Geezer

iTrader: (3)

Open the Holley program you have on your laptop,.
Goto "HELP". All the wiring info is there, under the contents tab.

ryany

iTrader: (15)

Checked all the pins they are all correct on the turbine,vss, and the main plug!! But on the harness T-U are not used with a 4l80 but there in the harness. Holley claims this is for 4l60 only.

truckdoug

iTrader: (25)

okay thats good news. next step is confirm your using an 80e base tune.

from there we start diagnosing possible issues with the trans itself. holley gets its PRNDL signals from the pressure switch. if there's any pressure problems in the valve body it'll read funky