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  1. Replies
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    Can you use the Scanner and command 3rd and 4th...

    Can you use the Scanner and command 3rd and 4th gear?
    Im fighting a issue with a 4L80E not going to 4th gear but i can command it to in the scan tool.
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    I was able to go low 12s with the factory 80E...

    I was able to go low 12s with the factory 80E converter in a 5100# truck, Turbo LQ4. But i used it for towing more than i did for "Racing".
    On the longer trips out of state it would average...
  3. For the Electric fans, yes just use this diagram...

    For the Electric fans, yes just use this diagram to connect them to the PCM.
    The AC, your going to want to use Trinary AC Pressure sensor from a Fbody i believe. But it will control the fans from...
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    My dealings with 4L80E is that if you use the...

    My dealings with 4L80E is that if you use the factory torque converter, its going to be a dog. That converter is really heavy. But for towing with a Turbo LQ4, its about perfect.
    For "Fuel Economy"...
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    I've already got the engine tuned with EFI Live....

    I've already got the engine tuned with EFI Live. Just couldn't find the right OS with efi live to do the T42 4L80E. So now I have the T42 4l80e tune from the repository with HP tuners.

    I just...
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    Credits for T42 Tune only

    We have finished a 4L80E swap in a 2008 Silverado. Time to load the tune this week.
    How many credits is it going to take?
    Ive never had to do this and cant find an answer to it.
  7. Replies
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    Id suggest using BC Trans tool and see if your...

    Id suggest using BC Trans tool and see if your tune needs adjusting. This program works very good and makes transmission tuning very easy and less aggravating.

    ...
  8. Thread: AWD 4L80e

    by RDF1
    Replies
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    717

    hum... IF it were me, id try a new VSS sensor...

    hum...
    IF it were me, id try a new VSS sensor and then check the wiring to the PCM.
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    Check transmission fluid level?

    Check transmission fluid level?
  10. Thread: AWD 4L80e

    by RDF1
    Replies
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    717

    Pull rear VSS. Look in there and see if it...

    Pull rear VSS.
    Look in there and see if it looks like this.96191

    If so. You have to figure out the transfer case issue.
  11. Thread: AWD 4L80e

    by RDF1
    Replies
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    717

    If it's a 4wd 4L80E then your not getting the...

    If it's a 4wd 4L80E then your not getting the correct reading on the rear VSS because it's picking up the Park Pawleys engagements.
    Need to figure out why the Xcase isn't giving yout a signal.
    ...
  12. Thread: AWD 4L80e

    by RDF1
    Replies
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    717

    I had a guy build me a 2wd 4L80E and he put a 4wd...

    I had a guy build me a 2wd 4L80E and he put a 4wd planetary in it. Well it didn't have a reluctor wheel but the VSS was picking up the Park Pawleys engagements so I had to change some stuff in the...
  13. Thread: First Log

    by RDF1
    Replies
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    I'll check out the logs monday when I get to work...

    I'll check out the logs monday when I get to work and text you.
    As long as we are moving in the right direction we are good. Just gonna take a few more tweaks so it returns to idle smoother.
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    Tagged for future reference. Tuned a 6.2 with a...

    Tagged for future reference.
    Tuned a 6.2 with a cam last night. Then found this just now. Wish I'd read this before starting.
  15. Thread: AWD 4L80e

    by RDF1
    Replies
    21
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    717

    Correct. IF its a AWD transfer case with no...

    Correct. IF its a AWD transfer case with no selections. Then you can use 2wd or 4wd tune.
  16. Thread: AWD 4L80e

    by RDF1
    Replies
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    717

    PCM doesnt care if its in 2HI or 4HI. It only...

    PCM doesnt care if its in 2HI or 4HI. It only needs to know about 4LOW to change the shifts.
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    Have you checked transmission fluid level?

    Have you checked transmission fluid level?
  18. Thread: AWD 4L80e

    by RDF1
    Replies
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    717

    Post your tune and a log. It will help...

    Post your tune and a log. It will help tremendously.
  19. Do you have your tune and a log available?

    Do you have your tune and a log available?
  20. Replies
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    Need to post the tune for anyone to be able to...

    Need to post the tune for anyone to be able to help.

    Looks like your narrow band and wideband oxygen sensors aren't agreeing.
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    I dont remember.. I was looking for the thread...

    I dont remember.. I was looking for the thread the other day.
    If i find it, ill post it for you. But they had similar issues. It wasnt doing what was commanded they had to fudge the numbers to get...
  22. Thread: Mpvi1 question

    by RDF1
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    This says you can But depends on which Denali? ...

    This says you can But depends on which Denali? The SUV or the 2500HD L5P?

    https://www.hptuners.com/vehicles/
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    There was something with the older Allison TCM...

    There was something with the older Allison TCM that had to have adaptive learning cleared so it could learn your driving? Its been awhile back but i remember with a 06 Dmax/Allison there were some...
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    Sometimes the Handheld tuners lock the ECU so you...

    Sometimes the Handheld tuners lock the ECU so you cant read the tune off.. Sometimes they arent locked.. Only way to know is to try.
  25. Can you confirm the injector data?

    Can you confirm the injector data?
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