98hc4mula

iTrader: (5)

OK here is the deal, I have a 98 formula that used to be a A4, I swaped it to a M6 and now I am in the process of doing a 4l80e on the car. I am almost done with the physical part of the swap but I am unsure as to what I need to do for the PCM part of the car.
I was going to have a tuner load a 4l60e stock file on the PCM and just adjust for the converter....
I know I have to do some PCM splicing and add a relay in there some how (got the instructions)

any help would be greatly appreciated. I am almost to that point of driving the car.
thanks folks.
David

MUSTANGBRKR02

iTrader: (91)

Do you have a tuning program?

98hc4mula

iTrader: (5)

no, I have someone local that uses HPTunner that is going to help me out.

MUSTANGBRKR02

iTrader: (91)

Who did you get the directions for the swap from? If it is from slow67 he should have directions in the file on what needs to be done in the pcm.

poconojoe

iTrader: (43)

Why would you be loading a 4L60E file in the PCM if you're planning on running a 4L80E?

joecar

If you already have instructions, then they would say:
- drive the 4L80E TCC PWM circuit from the 4L60E TCC signal (not TCC PWM),
- invert the 2-3 shift solenoid signal using a relay.

Those can be deduced from looking at the shift range charts and the TCC apply/release description in the HMTG books.

Those are minor wiring changes.

MUSTANGBRKR02

iTrader: (91)

You can run the 80 on a 60 file with wiring swaps and code deletion Joe.

98hc4mula

iTrader: (5)

ok I get it, I will try to follow his directions as much as possible. Did you guys do the pin swap at the PCM or at the plug?
Yes the directions were from Him.

joecar

Yes, that's what I'm saying...

Edit: oh, the other Joe was being addressed, Joe is a common name...

He will see a code for the 4L60E TCC PWM signal now being open circuit (unless he adds a pullup resistor or edits the code).

joecar

At the transmission connector.

poconojoe

iTrader: (43)

I always swapped the module out, since they alway seem to be a differant number.
I know the old OBD1 427 ECMs did either tranny with the same OS, but if I remember correctly, they weren't PWM

joecar

One reason for running the 4L80E from a 4L60E F-body segment is that the F-body segment doesn't unlock the TCC on zero throttle.

98hc4mula

iTrader: (5)

I have a couple of questions about the way to do it.
do you have some wires that will be disconnected entirely or ar they going to be used in the relay?
also what about the actual connector...is the U pin the one one next to V?

MUSTANGBRKR02

iTrader: (91)

Yes U will be next to v they should go in a-z order(its been a year since i looked though). Yes there will be a wire completely disconnected on the pin swap.

MUSTANGBRKR02

iTrader: (91)

This is the reason and it makes the 80 behave just like a 60 with lock/unlock it is a world of difference.

98hc4mula

iTrader: (5)

ok I did the wiring today and found out that two of the wires are completely disconnected. I added the relay at the tranny plug as well. I was going to do it at the PCM but it seemed a lot easier down there.
over all it is not that difficult, I was just having a hard time reading the directions.
I will have the tuner delete the codes that need to be deleted when he comes to my house. I still need to measure the T56 crossmember to have it modified for this transmission, I dont want to buy a new one bc I ust purchased a tubular one for the T56 so I hope is not too many modifications that I have to do to it.
the car should be running by next week. I am taking my time bc I am back at school and my help works nights so its hard to get a hold of him.....
thanks for all who chimed in.