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Thread: Built NAG-1/A580 harsh shifting at low loads

  1. #1
    Tuner in Training
    Join Date
    Apr 2015
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    16

    Built NAG-1/A580 harsh shifting at low loads

    Hi guys,

    I've done my fair share of stock 5 and 8 speeds but this is my first built A580. It's an Extreme Automatics transmission with a 3000rpm stall.

    I've flashed this thing probably 20+ times and no matter what I've done, I can't seem to get the shifts to be polite at lower loads. I spoke with Lonnie, at Extreme Automatics, who was awesome to talk to! Very nice guy, but he's not a tuner so he wasn't able to give me much insight.

    At even 15-20% throttle the shifts are almost uncomfortable and the owner of the truck is requesting it to drive nicer which I understand. Has anyone had good luck with this issue?

    All i need is to be pointed in the right direction!

    Thanks in advance!

  2. #2
    Potential Tuner
    Join Date
    Jan 2019
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    1
    Does it have blue top solenoids?

  3. #3
    Tuner coanan's Avatar
    Join Date
    Mar 2009
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    S. Florida
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    164
    Post the tune file.
    2013 Chrysler 300S, 6.4 BGE with 6.4 SRT cam, AIT 18% OD pulley, E-force with 2.75 pulley, fastman 84+4 mm throttle body, 1 7/8 kooks long tubes w/hi-flow cats, Magnaflow Cat-back, FTI 2800 stall, Trans built by Hellraiser, Dings Racing valve body and tune, Getrag 3.73, Walbro 400LPH, DW 65# inj. LG aluminum rad. Dual SRT fans. 4 piston Brembo upgrade. Mopar Stage one springs.

  4. #4
    Potential Tuner
    Join Date
    Feb 2017
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    8
    My guess is blue top solenoids vs brown tops. If it's got blue tops, you'll never be able to make a software change bc it'll be a hardware issue. Those things are beastly.

  5. #5
    Senior Tuner
    Join Date
    May 2015
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    1,844
    Best thing to do is leave the converter unlocked in 1 and 2, lock in 3rd. Thatll make all low speed driving dreamy. I don't recommend it for anything over 700whp though, as i have seen the converter struggle to lock up in 3rd gear during a wot pull.

  6. #6
    Advanced Tuner
    Join Date
    Jul 2007
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    Honeoye,Ny. Boondox son. Shoot guns out my back door. noone cares.
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    Im having the same problem with a friends SRT8 Jeep with a SHR full billy badass trans with the blue tops. From what I have read they have a different orifice, winding and return spring. Since WOT is fine (which means the solenoids are deactivated giving full shift/ine pressure) Could it be as simple as going into the Commanded PCS current and increase the values for lower line pressure?
    Me love boost long time.

  7. #7
    Advanced Tuner
    Join Date
    Jul 2007
    Location
    Honeoye,Ny. Boondox son. Shoot guns out my back door. noone cares.
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    Well I just confirmed my hypothesis. If you run blue top solenoids along with a built, high line pressure trans you need to modify the Commanded PCS Current table in the lower pressure regions by 15-20% and slope it off.
    WOT is still hard as fock (PCS=0) and part throttle shifts and downshifts are nice and smooth.

    PCS table.png
    Last edited by Baldturbofreak.com; 2 Weeks Ago at 02:23 PM.
    Me love boost long time.