OS question

[white.lightning]

Hello
I currently have a 1998 Pontiac Trans Am LS1 T56/M6 and your MPVI Pro software.

This winter I am swapping a 4L80e transmission into the car. I purchased 12200411 (2001-2002 F-body) PCM with the 2002 F-body automatic tune (OS) in it. I am changing my engine/trans harness to a 2001-2002 A4 harness and adapting the 4L80e pigtail to it.

What exactly do I need to do in order to begin tuning the car?
Do I need to download a truck tune from say a 2003 Silverado w/ a 4L80e and have HPT modify that?
Do I need to send my 2001-2002 PCM into HPT to have it modified?

I am unsure what I need to do. Thanks for the help.

Andy

[white.lightning]

Taken from a Ls1Tech sticky:

"~ The PCM "WILL" control the 4l80e. Ive seen this alot on here where people say you have to buy a standalone contoler from TCI. If you want to go that route then thats fine but the stock PCM will control the 4l80e. You will have to have the PCM flashed with a new operating system. I simply pulled the .hpt or .bin file from my car, and also found a stock 4l80e truck .bin emailed it to Keith at HPtuners and he fixed it to reflect the new OS to control the 4l80e. You can have EFIlive do this also, but you, yourself can not make these changes.

~ 98 PCM's will not control the 4l80e. There are a couple alternatives for 98's. You could run a manual valve body meaning you shift gears yourself. Or you can control the 4l80e either with a TCI stand alone controller or the BS3. The BS3 has a module where you can contol any GM trans just like you would with HPtuners, EFIlive, or LS1edit. You could also swap out the PCM for a 99+ PCM then have the OS changed. (thanks obZidian!)"

Why is this change needed???

[white.lightning]

Anybody????

[gsegse]

cos 98 pcm won't accept any new os . also 98 bin file from anther 98 PCM .
thanks