4L80e shifting trouble - The 1947 - Present Chevrolet & GMC Truck Message Board Network

farmtrucks · 04-01-2013, 01:10 PM

I am putting a 4L80e behind a 5.3 and it is not shifting right.
I have a PSI harness with the right connectors for the trans.
My tuner is using hptuners
We can manually toogle the shift solenoids with a scanner, but the ecm will not activate the solenoids.
Can we reflash the 5.3 ecm to work with the 4L80e somehow?

Wasted Income · 04-01-2013, 02:26 PM

I've used a 4L80E behind a 5.3 and it worked just fine. I did a segment swap to use the transmission calibration from a truck with an 80E. Using the 5.3 ECM shouldn't be a problem (since they are all pretty much the same ECM)

farmtrucks · 04-01-2013, 04:13 PM

Quote:

Originally Posted by Wasted Income

I've used a 4L80E behind a 5.3 and it worked just fine. I did a segment swap to use the transmission calibration from a truck with an 80E. Using the 5.3 ECM shouldn't be a problem (since they are all pretty much the same ECM)

Define segment swap.

Wasted Income · 04-01-2013, 04:22 PM

Quote:

Originally Posted by farmtrucks

Define segment swap.

Quote:

Originally Posted by Wasted Income

to use the transmission calibration from a truck with an 80E.

(with the engine calibration from a 5.3)
I would hope your tuner knows what a segment swap is and how to do one. If not, i'd find another "tuner"...

BR3W CITY · 04-01-2013, 06:51 PM

Agreed, have him check the tune, almost sounds like its got the 60e or manual trans setup in the ecm.

....And like he said, if the tuner doesn't know what you mean, run.

ls1nova71 · 04-02-2013, 06:23 AM

Can you do a segment swap with HPTuners now? Used to be you had to use EFI live or Tunercat to do that as I recalll.
Posted via Mobile Device

Jon01 · 04-02-2013, 07:48 AM

You can do it with HPT now.

04-01-2013, 01:10 PM	#1
farmtrucks Registered User Join Date: Jun 2011 Location: Sneedville, TN Posts: 831	4L80e shifting trouble I am putting a 4L80e behind a 5.3 and it is not shifting right. I have a PSI harness with the right connectors for the trans. My tuner is using hptuners We can manually toogle the shift solenoids with a scanner, but the ecm will not activate the solenoids. Can we reflash the 5.3 ecm to work with the 4L80e somehow? __________________ High School Project I ---http://67-72chevytrucks.com/vboard/s...d.php?t=639174 High School Project II ---http://67-72chevytrucks.com/vboard/s...27#post7290427 High School Project III ---http://67-72chevytrucks.com/vboard/s...d.php?t=715832 High School Project IV (Tyler) ---http://67-72chevytrucks.com/vboard/s...d.php?t=780186

04-01-2013, 02:26 PM	#2
Wasted Income Boosted Member Join Date: May 2002 Location: Mackinaw, IL Posts: 2,200	Re: 4L80e shifting trouble I've used a 4L80E behind a 5.3 and it worked just fine. I did a segment swap to use the transmission calibration from a truck with an 80E. Using the 5.3 ECM shouldn't be a problem (since they are all pretty much the same ECM) __________________ 1972 2wd K/5 Blazer Turbocharged 370 LSx - 941 rwhp / 1093 rwtq 1969 Chevy K-10 L33 5.3 / 4L80E / NP241 / 4" lift 1964 Buick Skylark Twin TURBO 383 LS pro-touring project 2014 VW Passat TDI - Daily Driver Turbo diesel 2015 Sierra Denali HD Duramax Turbo diesel 2023 Ford Explorer ST - Twin Turbskis 2023 Ford F150 RCSB - Whipple Supercharged 2017 Polaris RZR Turbo 2014 Nor-Tech Center Console - Twin Supercharged Outboards *TURBO ALL THE THINGS!!*

04-01-2013, 06:51 PM	#5
BR3W CITY meowMEOWmeowMEOW Join Date: Sep 2009 Location: MKE WI Posts: 7,128	Re: 4L80e shifting trouble Agreed, have him check the tune, almost sounds like its got the 60e or manual trans setup in the ecm. ....And like he said, if the tuner doesn't know what you mean, run. __________________ *'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING* MY BUILD THE H8RDCPTR //\\ MY YOUTUBE CHANNEL REV J HD

04-02-2013, 06:23 AM	#6
ls1nova71 Registered User Join Date: Dec 2009 Location: Independence Mo Posts: 4,119	Re: 4L80e shifting trouble Can you do a segment swap with HPTuners now? Used to be you had to use EFI live or Tunercat to do that as I recalll. Posted via Mobile Device __________________ My '72 short bed build. http://www.ls1tech.com/forums/conver...6-0-4l80e.html 5.3 swap into my RUSTY '71 C10 http://ls1tech.com/forums/conversion...71-c-10-a.html

04-02-2013, 07:48 AM	#7
Jon01 Registered User Join Date: Nov 2012 Location: West Des Moines, Iowa Posts: 450	Re: 4L80e shifting trouble You can do it with HPT now.



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