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04-01-2013, 01:10 PM
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#1 |
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Registered User
Join Date: Jun 2011
Location: Sneedville, TN
Posts: 831
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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 |
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04-01-2013, 02:26 PM
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#2 |
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Boosted Member
Join Date: May 2002
Location: Mackinaw, IL
Posts: 2,200
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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 2016 Ford Explorer Sport - Twin Turbskis 2017 Polaris RZR Turbo 2014 Nor-Tech Center Console - Twin Supercharged Outboards TURBO ALL THE THINGS!! |
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04-01-2013, 04:13 PM
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#3 | |
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Registered User
Join Date: Jun 2011
Location: Sneedville, TN
Posts: 831
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Re: 4L80e shifting trouble
Quote:
__________________
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 |
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04-01-2013, 04:22 PM
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#4 | ||
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Boosted Member
Join Date: May 2002
Location: Mackinaw, IL
Posts: 2,200
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Re: 4L80e shifting trouble
Quote:
Quote:
I would hope your tuner knows what a segment swap is and how to do one. If not, i'd find another "tuner"...
__________________
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 2016 Ford Explorer Sport - Twin Turbskis 2017 Polaris RZR Turbo 2014 Nor-Tech Center Console - Twin Supercharged Outboards TURBO ALL THE THINGS!! |
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04-01-2013, 06:51 PM
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#5 |
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meowMEOWmeowMEOW
Join Date: Sep 2009
Location: MKE WI
Posts: 7,128
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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.
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'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING  |
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04-02-2013, 06:23 AM
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#6 |
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Registered User
Join Date: Dec 2009
Location: Independence Mo
Posts: 4,117
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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 |
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04-02-2013, 07:48 AM
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#7 |
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Registered User
Join Date: Nov 2012
Location: West Des Moines, Iowa
Posts: 450
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Re: 4L80e shifting trouble
You can do it with HPT now.
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