Tc Hampton

I have a 5.3 I'm putting a 4l80e behind and I have the factory harness I was wondering what wires I'm gonna need to move the pins in and explain how to wire the second vss and I'm just not 100% sure how to do it and were can I getting the connectors for the 4l80e

Burken01

iTrader: (88)

Pm slow67 the godfather of 4l80 wiring!!

Do you have a A4 pcm with your harness?

Tc Hampton

idk what the A4 is I got the factory stuff the pcm was blue and green it has dbw but ill be going to dbc but im sure that done mean anyting

98cobrakiller

smh a4 means A=automatic 4= 4 speed

Burken01

iTrader: (88)

yes automatic 4 speed, if your 5.3 and harness was originally a factory A4 then the swap will be easier, if your PCM has the manual t56 tune on it, it will have to be reflashed for an auto tune then you can re pin the harness to run the 4l80..

allout06

iTrader: (11)

in for info and diagrams

wish someone would just write a complete how to on how to do this form start to finish.

Monte4ever

iTrader: (2)

I'm looking for the same info. I have a PSI swap harness setup for an th400 that I want to add a 4l80 to. Any help out there?

Proto X

iTrader: (42)

PCMforless sells a plug and play harness.