Need blackbox 4L80E tune for my 4L80E segment swap

[Supercharged111]

I ASSume the segment swap covers this? Can you explain why some, but apparently not all of the speedo segment's tune was changed with the trans segment swap?

[joecar]

The trans segment swap only swaps the trans segment...

and then the tunetool does some math to obtain some of the parameters in the speedo segment (I don't undertand all the relationships);


so you should also swap the speedo segment and make sure all its parameters populate correctly

(e.g. the output reluctor will be a lot more than 40... I counted the teeth on a 4L80E output planet carrier once, but I have since forgot how many).

[Supercharged111]

Well I rescued my cell phone and used it to check my speedo which is still dead on, my output reluctor is in the transfer case which is the same one I had behind the 4L60E. From here I just make the part throttle shift speeds and TCC apply/release work to my liking. They were so bad in that stock tune that I simply copy/pasted my 4L60E's TCC apply/release tables over simply because overall they were less wrong. I'd really like to get that spreadsheet working, but it's giving me fits at home. Works like a champ at work where I don't have EFILive software. Figures.

[EagleMark]

Well I rescued my cell phone and used it to check my speedo which is still dead on, my output reluctor is in the transfer case which is the same one I had behind the 4L60E.

D'oh!

What does a factory 4L80E with 4x4 transfer case do? Does it have same VSS on transfer case too?

[Supercharged111]

Yup, VSS in the t-case with a small looking reluctor on its output shaft. The 4L80E's output shaft speed sensor is just there for decoration now. My neighbor says his trans has a plug bolted in back there.

[EagleMark]

So 4L80E 2wd rear VSS in tranny and 4l80E rear VSS in transfer case?

[Supercharged111]

Yup. The real kicker is that the harness is the same for both! I could plug into the 4L80E's rear sensor if I wanted to, my harness has an extension harness that leads back to the t-case. I'm guessing 4LO is the reason for the VSS being in the t-case on 4WD trucks.

[Supercharged111]

As far as I can tell, the 4L60 is a Yes and the 4L80 is a No for H4593.

Jeff

Finally took another look at this and can see that the segment swap made the change for me. I wonder if it has to do with 4L60E having TCC on/off and PWM vs 4L80E only having PWM?

[Supercharged111]

So just a little follow-up here, I've been ignoring the truck but I'll need it this weekend to drag my car to the track so back to the laptop I go. I found that somehow EVERYTHING got put back to stock, so stock fueling, stock timing map, MIL for every little goddamned thing I ripped off the truck, wrong sized fuel tank, you name it. A word of caution to anyone doing a segment swap, CHECK EVERYTHING! No wonder the truck was so ball-less and down 14 degrees of timing on the top end.

[hog]

There are 8 segments on these PCM's did you do more than a single segment swap, like just swapping the trans calibration itself? TC2 calls these "Modules".

1) The O/S cal.
2)Engine cal.
3) HVAC cal.
4)ABS cal.
5) Speedo cal.
6) VIN cal.
7) Trans cal.

I'll have to remember that for future calibration.

peace
Hog