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Thread: PROBLEMS!!!! 4L60E not shifting at WOT

  1. #21
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    Thanks for the info on the bluecat, I'll give it a try.

    As for the channels I add mph. Today its been raining cats and dogs, Im going to dive the truck tomorrow so I can get some good logs.

  2. #22
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    Question Hp Tuner Log File (NOT SHIFTING from 2nd to 3rd at WOT)

    Any help would be great...Get code p0894
    Attached Files Attached Files

  3. #23
    Senior Tuner mbray01's Avatar
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    894 is an indication that it is trying to shift, but doesnt, If shift pressures are within reason, then trans is likely smoked. time for a rebuild
    Michael Bray
    Rusty Knuckle Garage
    Slidell, Louisiana
    20yr Master Tech.
    Advanced Level Specialist
    Custom Car Fabrication, Customization, High Performance.
    GM World Class Technician
    Shop Owner

  4. #24
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    current tune?

    looking at log compared to previously posted tune, you reached 6000 rpm but were only going 49 mph, but shift speed is 53. so you met rpm requirement, but not mph. maybe bring them down to a safe level and sneak up on it.

    i also see alot of slip, probably should be saving for a trans as well.

  5. #25
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    trans was new and just had 3 and 4 clutches replaced. Ive put less than 100 miles on the trans total. I just dont know why its burning itself up

  6. #26
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    Quote Originally Posted by Erik Dicus View Post
    current tune?

    looking at log compared to previously posted tune, you reached 6000 rpm but were only going 49 mph, but shift speed is 53. so you met rpm requirement, but not mph. maybe bring them down to a safe level and sneak up on it.

    i also see alot of slip, probably should be saving for a trans as well.
    Ill give that a try

  7. #27
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    you ever get bluecat to work?

  8. #28
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    Here's my tune, ignore everything else bar the trans shift points and see how they compare to yours, give me an idea of rear end ratio and tire size to compare. I'm running 3.54 diff and 28" tall tires, you can have 2 logs open at the same time and compare each component/file as a comparison, hope this helps, john
    Attached Files Attached Files
    Gen3 L59/4L60E LS3 cast manifolds, Small Cam change, 2800 Convertor, MPVI, using MTX-L for wideband tuning

  9. #29
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    Quote Originally Posted by jsf55 View Post
    Here's my tune, ignore everything else bar the trans shift points and see how they compare to yours, give me an idea of rear end ratio and tire size to compare. I'm running 3.54 diff and 28" tall tires, you can have 2 logs open at the same time and compare each component/file as a comparison, hope this helps, john
    thanks Im running 33'' tires with 3.73 diff

  10. #30
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    3.77 x 33.jpgThat's a quick calculation of where your settings should be, I think your diff I a bit tall
    Gen3 L59/4L60E LS3 cast manifolds, Small Cam change, 2800 Convertor, MPVI, using MTX-L for wideband tuning

  11. #31
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    Quote Originally Posted by jsf55 View Post
    3.77 x 33.jpgThat's a quick calculation of where your settings should be, I think your diff I a bit tall
    Thanks, Ill look it over....

  12. #32
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    Today I put a new tune in and it's the best so far. The truck now with shift at WOT. I just need to play with 2nd to 3rd a little. I feel like it doesn't pull hard enough.

    Also im going to pull the 5.3 out and put in a LS2

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  14. #34
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