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Thread: A580 Transmission Tuning

  1. #1

    A580 Transmission Tuning

    Looking to make the shifts more aggressive but not having any luck. I tried adding 400 rpm to the WOT Normal Upshift Table but it didn't make much difference. Do I need to adjust the shift pressures or the shift times as well?

    Any help or info is greatly appreciated.

  2. #2
    Advanced Tuner
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    yes what do you want to do, firmer or change the shift rpm ?
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  3. #3
    Firmer shifts

  4. #4

  5. #5
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    Try looking at the converter slip settings too.
    With the converter set soft, the shifts will never be firm.
    OE stock tune often has real soft converter settings, so once you firm that up,
    you may find the ramp tq tables are good or even too hard.

  6. #6
    Advanced Tuner WS6HUMMER's Avatar
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    Quote Originally Posted by Hemituna View Post
    Try looking at the converter slip settings too.
    With the converter set soft, the shifts will never be firm.
    OE stock tune often has real soft converter settings, so once you firm that up,
    you may find the ramp tq tables are good or even too hard.
    Thanks for that info, I've tuned a few of these transmissions and wondered why the ramp torque didn't do much. What about disabling lockup completely for 1 & 2? I've done that on a 45RFE recently with good results.
    99 T/A WS6, SBE original LS1, GT4788,TH400, TR224, stock heads.

  7. #7
    Tuner Pector55's Avatar
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    Quote Originally Posted by WS6HUMMER View Post
    Thanks for that info, I've tuned a few of these transmissions and wondered why the ramp torque didn't do much. What about disabling lockup completely for 1 & 2? I've done that on a 45RFE recently with good results.
    I did that for the 1-2 shift with my Challenger R/T. I cut a 1.62 60ft NA. I had 3.91 gears and a 3000 stall but it definitely helped. Later, I did the same with my buddy's Procharged Charger and it helped him get off the line much better as well. He ended up dropping a tenth from his 60ft.
    2013 Dodge Challenger RT Plus - Shaker

  8. #8
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    Quote Originally Posted by Hemituna View Post
    Try looking at the converter slip settings too.
    With the converter set soft, the shifts will never be firm.
    OE stock tune often has real soft converter settings, so once you firm that up,
    you may find the ramp tq tables are good or even too hard.
    and how to firm that ? ^^

  9. #9
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    I'm intrested in the same info.

    Have you succeeded with that ?

  10. #10
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    Quote Originally Posted by GeForce1986 View Post
    and how to firm that ? ^^
    You can change the converter slip % to what you want and move the lock up speeds also.

  11. #11
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    Could just be in my head because I didn't pay much attention before but I think I even got better gas mileage in my daily 392 Charger after I spent a while playing with transmission tuning and I'm guessing it's related to TCC changes.

  12. #12
    Tuner in Training HemiX2's Avatar
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    Definitely! Less slippage means better fuel economy. I've pretty much zeroed out the TCC slip and my in town fuel economy has gone up about 1 mpg. Can't wait to get it on the highway.
    Last edited by HemiX2; 08-10-2018 at 10:47 PM.
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  13. #13
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    so for firmer shifts should i increase the numbers on the tcc desired slip ? and the t ramp ? or how it is ? sorry am noob at gearing lool

  14. #14
    Advanced Tuner uarperformance's Avatar
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    Thats the tuning learning part. People on the forum give you things or areas to look and you try them one at a time. If you dont understand the numbers why they would have to go up or down. Make one change and save as new tune. Test drive and see what it does. Go in small increments one way. Then if it is not doing the thing your looking for, go the other way in increments. If it does nothing either way. You try another section. I have used the torque reduction tables to increase shift firmness