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Thread: Just killed my TH350. I have a 4L80E and tune is 3bar SD 0411.

  1. #1
    Tuner in Training
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    Oct 2014
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    Just killed my TH350. I have a 4L80E and tune is 3bar SD 0411.

    How can you find out if your OS/Tune is set for an automatic versus manual? I started out with a 3bar SD open loop OS and a turbo 350. That trans died yesterday (boost spiked to just under 30psi whereas the normal is only 21) and I have a 4L80E ready to go in. Just wondering if there's a way to tell before hand if I need a segment swap.
    Attached Files Attached Files

  2. #2
    Tuning Addict 5FDP's Avatar
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    May 2012
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    That file already has the 4L80e parameters in there, so it's really to go as far as I see.

    If you opened the transmission tab and there was only 2 sections and it already said "manual" in the drop down it would require a segment swap.

    It's likely you will need to make sure the DTC's for the transmission are active so you can trouble shoot issues if need be. Best to compare with a stock tune to see what the correct setting are.
    2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.

    If you don't post your tune and logs when you have questions you aren't helping yourself.

  3. #3
    Tuner in Training
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    Oct 2014
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    Thanks! I'll do that.


    Quote Originally Posted by 5FDP View Post
    That file already has the 4L80e parameters in there, so it's really to go as far as I see.

    If you opened the transmission tab and there was only 2 sections and it already said "manual" in the drop down it would require a segment swap.

    It's likely you will need to make sure the DTC's for the transmission are active so you can trouble shoot issues if need be. Best to compare with a stock tune to see what the correct setting are.