Fall Line

iTrader: (5)

Just swapped a 4l80e into a 2000 t56 camaro, segment swapped using HPtuners. I'm getting intermittent part-throttle early shifting. When it happens it will shift both 1-2 and 2-3 and lock the converter at the 0% TPS column of the shift/tcc table. Any ideas would be welcome, I changed the TPS even though it never actually dipped in the logs - no help. Tune/log/config and screenshots attached, only code is P0103 (speed density).

Good shift



Bad Shift



Shift table

Fall Line

iTrader: (5)

Still cant figure it out. Changed the 0% TPS column of the shift table a few times and the intermitent early shifting follows. Attaching another log/config/tune with more pids logged along with status bits.

Good shift:



Bad Shift:



shift table:

Fall Line

iTrader: (5)

Bumping this one back up. The bad shifts seem to correlate to a higher TCC slip. All the good shifts are at a lower TCC slip (3-500) and the early shifts are at a 600+ TCC slip. I've been playing with the P1870 stuff as a result with no success but its never set a code.

I attached the current tune, log and layout file (3.0 hptuners).

Good Shift:



Bad Shift:

truckdoug

iTrader: (25)

huh looks like you got the PWM turned off which is what I was gonna say. did you max the pwm pressure tables or just disable the code?

what does it do in D3? same short shift 2-3?

Fall Line

iTrader: (5)

Are you talking about the TCC PWM%? It locks in both those screen shots (100%) after shifting to 3rd.

All this is in D3, I believe it does it in D4 too but I'd have to check some old logs as I usually drive in D3. It short shifts 2-3 also at the 0% 2-3 value of the shift table sometimes. It also locks the converter at the 0% TPS value of the TCC table sometimes.

truckdoug

iTrader: (25)

man that's weird. do you want to have a look at my 4l80e tune you can do the compare file thing even if they arent the same OS. i have it running pretty sweet.

Fall Line

iTrader: (5)

That would be great. I'd even eat the credits at this point and flash a known good file for lack of any other ideas. I'll pm you my email in case you dont want to post it.

truckdoug

iTrader: (25)

ok i sent it email just to be sure but here it is again.

If you want to start fresh I can look in my computer for a 4l80e segment that matches your OS # that way to you dont spend any credits.

oh and I was gonna ask how you pinned out the trans connector and if you were using a range switch.


I just went through this swap myself and it took some fooling around to really get it dialed in.

Fall Line

iTrader: (5)

No Prndl switch, Speartech t56 conversion harness. I think I'm going to start with an Auto file from a 2002 camaro with the 12212156 OS and start over.

Thanks.

truckdoug

iTrader: (25)

Ok then, the trans segment from my truck ought to work. Make sure to also grab the trans diagnostic segment too.

Oh and select "none" from the drop down for the range switch, mine is tuned & wired for P/N only.

Fall Line

iTrader: (5)

Update:

Started over with a stock 2002 Auto file (OS 12212156) and performed the 4l80E segment swap, problem solved.

joecar

Ok, good job, I was thinking about it and was going to suggest that...

for which year/model/vehicle did you find a 12212156 4L80E segment...?

Fall Line

iTrader: (5)

I've been thinking about this for a while, I dont know why I was so stingy about HPT credits. The swap file was 2002 Silverado with a 6.0l / 4l80e. Grabbed it from the HPT tune repository.