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Thread: Keeping converter locked on 4l80e at 0% Throttle

  1. #1
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    Keeping converter locked on 4l80e at 0% Throttle

    I have the latest beta version of HPT and i have been trying to keep my 2002 4l80e to stay locked at 0% throttle and i cannot make it do it.

    This is in a 2002 silverado with a 6.0/4L80E tune file, which is a drive by cable (DBC).

    I have done this successfully on a 2003 6.0/4L80E drive by wire truck(DBW), but i cannot get my DBC truck to stay locked at 0% TPS.

    Has anyone else been able to do this successfully?

  2. #2
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    I got it to work...here is how i did it if anyone else needs help.
    Don't judge my tables. I have been trying to get the converter to stay locked at 0 throttle, and i know this works as it is but i still need to pay with the lockup speeds as it is now. With a big cam it is pretty "jerky" at low speed and low tps like it is set now.


  3. #3
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    I was going to try this on my truck. Good to know that it's going to work. Thanks.

  4. #4
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    I am a Newbie to tuning and I'll admit I dont know the ins and outs of tuning but is this safe for the longevity of the tranny?

  5. #5
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    4L60E's are tuned this way from the factory...

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    I have 2.23 beta and it doesnt have the option of minimum throttle response like in the screen shot above, but it does have the TCC apply/release tables. Will it work if I configure my throttle position % 0 like he has?

  7. #7
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    Quote Originally Posted by Beatdown Z View Post
    4L60E's are tuned this way from the factory...
    Only cars, never seen a truck OS keep the TCC locked on 0% TPS. Goes for the Gen IV stuff too.
    ~Erik~
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  8. #8
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    ok...

  9. #9
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    @ beatdown z by adjusting the TCC minimum values that much how will affect my ability to tow? My express 3500 van contains 275 gallons of water and weighs upwards of 10k.

  10. #10
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    Which "minimum values" are you referring to?

    Keeping the converter locked when you reach 0% throttle will not affect towing. Honestly, for a truck with a stock converter, you'll hardly notice a difference.

    Now the guys with the aftermarket high-stalling converters and loud exhaust... that's a different story...

  11. #11
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    Quote Originally Posted by Beatdown Z View Post
    ok...
    So that's a bone a stock tune from a 5.3L truck? Does that actually keep the TCC locked when you let off the gas completely at, say 60mph? Im betting no... All tunes have the 0% value set, but in truck OSs they still unlock when you let off the gas.
    ~Erik~
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  12. #12
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    Yes and yes. AFAIK, all light duty 4L60E trucks keep the converter locked at 0% throttle.

  13. #13
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    Quote Originally Posted by banker099 View Post
    I got it to work...here is how i did it if anyone else needs help.
    Don't judge my tables. I have been trying to get the converter to stay locked at 0 throttle, and i know this works as it is but i still need to pay with the lockup speeds as it is now. With a big cam it is pretty "jerky" at low speed and low tps like it is set now.

    I have beta version 2.23.582, but I don't have those Minumum Throttle Release tables. Do I need a newer version of 2.23 to get them?

  14. #14
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    Well, I just downloaded the latest Beta, and now I have these tables, and the converter stays locked when coasting at 0% TPS.

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    Nice, ain't it!? No more having to mess with relays and 60E tunes...

  16. #16
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    Thanks for this information. I just finished my 4L80E swap into my 2000 Silverado. This is my first time tuning. So to keep the converter locked at 0% I change low speed VSS and high speed VSS to 256, and the rest to 0%?

    Do I also change the 2nd apply and 2nd release table to 255?


  17. #17
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    Quote Originally Posted by iregret View Post
    Do I also change the 2nd apply and 2nd release table to 255?
    You can if you want to.

    Here's what mine looks like.

  18. #18
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    Thanks!

  19. #19
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    Can these tables be added to the T42 OSs? Great the LS1 PCMs have it, the T42s need these as well.
    ~Erik~
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    2008 TrailBlazer 3SS AWD LS2, loaded, dropped, modded, SE22 Performance tuned. And then some...
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  20. #20
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    Quote Originally Posted by ScarabEpic22 View Post
    Can these tables be added to the T42 OSs? Great the LS1 PCMs have it, the T42s need these as well.
    Please
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