Ryan33187

iTrader: (16)

Alright, wondering if this could correct my problem with the transmissions issues I am having. I purchased the harness and such from speartech and had a segment swap, but the transmission is throwing 3 codes and is not running properly. Codes are electrical issues which, I feel is the harness not being wired correctly (had it happen with a hotwire kit I purchased before also). Thinking about trying this and sending the harness and such back.

slow67

iTrader: (2)

It doesn't matter, if you have the ISS plugged in the PCM won't use it.

slow67

iTrader: (2)

What are the codes? It is possible, but it is also possible there are other issues.

Ryan33187

iTrader: (16)

Codes it is throwing is 0743, 0753, 0758

slow67

iTrader: (2)

You could try taking the adapter harness apart and making sure all the connectors are seated properly.

phasemaster1

iTrader: (11)

What about your shift table settings? Thats got to be off some since the gearing is different or not?

Gilbert@Ace Racing

If you're referring to the original post where the segment swap is not necessary... you're right. The shift schedule tables need to be modified.

I have done many 80e conversions myself and have found this to be the most reliable and easiest way to manage the transmission by far! Once I had figured out the harnesses and PCM pin locations I never looked back!

g

phasemaster1

iTrader: (11)

Gilbert how many conversions have you done not using segment swap? Also how did you go about changing the shift schedule tables just copy paste?

ZeeTwentyFate

iTrader: (19)

i would like to have more info on this as i have a harness with wires and pins from a truck i want to wire in myself. and i have a segmented tune along with a 4l60e tune.

Vetal

iTrader: (3)

slow67, now after 2 years, do you still think 4L60 tune is better to control 4L80 tranny? or maybe you've heard of way to make TC stay locked at 0% TPS?

Gilbert@Ace Racing

My bad! Didn't mean to ignore you, just didn't see you questions! Don't hesitate to call me or PM me in the future if I do not respond in a timely manner. I am a busy dude, don't mind helping.. .just get busy ya know!

I have done enough to know that there is no need to do a segment swap when converting a 60e to an 80e.

Yes, as far as the shift tables are concerned I simply copied a known good configuration and moved into tuning it out from there. As you know, no two are ever the same. Very few guys have the exact combination and I prefer to road tune my transmissions for the sake of good driveablitiy. Dyno tuning is not a good procedure to use when dialing in a transmission.

g

slow67

iTrader: (2)

I am still running it on my daily driver. I know of no other method to keep the TCC locked at 0% TPS.

Fbodyjunkie06

iTrader: (10)

I think vetal has been having tcc lockup issues lately maybe you can help him out slow like you helped me out?

Just to credit slow, he has come through in the clutch when I didn't even know he existed. He sent me some pm's and helped me stage my turbo 80e at the lights as I was having troubles pushing through getting my turbo spooled.

I wouldn't be cutting the tree down on ****'s if it weren't for him!

slow67

iTrader: (2)

Vetal, if you need help (and have hptuners for your car) PM me for further help.

83 silverado

Good info

83 silverado

............

Vetal

iTrader: (3)

So it seems that 4L60 tune is better than 4l80 in that it actually keeps TC locked at 0%, right? Any other benefits of one or another?
What about extra ISS sensor of 4L80 - doesn't it give any advantages?

slow67

iTrader: (2)

Yes, that is a benefit (keeping the TCC locked at 0% throttle). Also don't have to wire in an ISS sensor (if you have trouble finding one).

Disadvantages: Another relay that can go out (not common, but may happen after so many years, just like a fuel pump relay, etc).
Have to delete slipping codes (unless you have EFILive).
With an ISS (and an 80E tune), the PCM will probably be better at detecting slipping clutches.

Vetal

iTrader: (3)

I've already wired my ISS so only thing left to wish is TC locked at 0% TPS. One guy at HPTuners forum claims his doesn't unlock when he lifts off... I'll try to find more on this

slow67

iTrader: (2)

I searched for a guy like that a couple of years ago, no luck.