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Thread: 41TE/604 operated by Megasquirt

  1. #41
    Supporting Member Turbo Mopar Contributor Ondonti's Avatar
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    Seattle
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    Re: 41TE/604 operated by Megasquirt

    I really think we should be using ignition cut on shift it will save many other parts. Doing it on the a413 seems only possible with a micro switch on the shifter
    Brent
    GREAT DEPRESSION RACING
    1992 Duster 3.0 The Junkyard- Now - Megasquirt II/Extra. OEM 10:1 3.0 n/a.
    - Old - 11.5@125 22psi $90 Stock 3.0 Junk Motor - 516whp 519wtq 20psi 91 oct built 3.0 stock n/a computer
    1994 Spirit 3.0 - 12.9@106 10 psi - Daily Holset He341 280whp 304ft/lb
    1994 Spirit 3.0 A670 - Wife's
    1990 Spirit 3.0 E.S. 41TE
    1993 Spirit 3.0 E.S. 41TE
    1994 Duster 3.0 A543
    1990 Lebaron Coupe 2.5 T1 31TH
    1981 Starlet KP61 Parts
    1983 Starlet KP61 Parked
    1998 Dodge 12v Cummins 47re 4x4 4dr longbed

  2. #42
    Hybrid booster
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    812

    Re: 41TE/604 operated by Megasquirt

    Hello,
    The switches that are being referred to are the signals from the 'code plate'.
    This is what the transmission uses to determine the actual position of the manual valve.
    This is critical as various gears can be accomplished by various means based on where the manual valve resides.

    I have always been interested in this topic as I own a Mexican 41TE case which means it has the bell housing provision for the 2.2/2.5 rather than the later 2.4 due to the change in the starter bell location.
    Yes - the Autostick function was pathetic at best because there are three stages to the shift which delay response.
    They are split as such:

    Fast Fill - this is the shift stage that pre-fills the clutch to the upper touch point just prior to the build of torque capacity
    Torque phase - this is the second phase which duty cycles the PWM to achieve a point to begin the inertial phase
    Inertial phase - this is the speed change portion of the shift that moves us from one ratio to another

    What's awful about the aftermarket systems is that they do not replicate or support these phases - I'm attempting to correct this.

  3. #43
    Supporting Member II Turbo Mopar Contributor
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    Re: 41TE/604 operated by Megasquirt

    Well...we need help! LOL

    Is the programming on the older TCM's the same as the programming in the integrated controllers? Meaning, could already defined programming from JTEC's and the like be used to define what's on the stand-alone TCM's?

  4. #44
    Moderator Turbo Mopar Staff Force Fed Mopar's Avatar
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    Re: 41TE/604 operated by Megasquirt

    My '91 Daytona knows what position the selector is in, and definitely doesn't have any switches inside the car. It is all internal to the trans on the 604/41te. The shift points and lockup schedule is changed when you put it in 3 instead of OD.

    Shelgame had mentioned that part of the programing wasn't on the main chip in the TCM, but hidden somewhere else in it and that was the main blockade to further development.

    Rob M.
    '89 Turbo GTC
    2.5 TIII swap is here!

    Project LookOwt
    '91 Daytona ES, 61k original miles, Rick Lozier's old 3.0 nitrous car
    Back to basics, then the mods go back on....

  5. #45
    Moderator Turbo Mopar Staff Force Fed Mopar's Avatar
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    Re: 41TE/604 operated by Megasquirt

    Quote Originally Posted by 5DIGITS View Post

    Fast Fill - this is the shift stage that pre-fills the clutch to the upper touch point just prior to the build of torque capacity
    Torque phase - this is the second phase which duty cycles the PWM to achieve a point to begin the inertial phase
    Inertial phase - this is the speed change portion of the shift that moves us from one ratio to another

    What's awful about the aftermarket systems is that they do not replicate or support these phases - I'm attempting to correct this.
    This would be great! Especially if it was just being able to reprogram the factory TCM with different shift timing and shift up/down points.

    Rob M.
    '89 Turbo GTC
    2.5 TIII swap is here!

    Project LookOwt
    '91 Daytona ES, 61k original miles, Rick Lozier's old 3.0 nitrous car
    Back to basics, then the mods go back on....

  6. #46
    Supporting Member II Turbo Mopar Contributor
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    Jan 2006
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    Everett, WA
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    Re: 41TE/604 operated by Megasquirt

    Oh yeah...I remember the whole thing about the programming not being all on the one chip. Forgot about that.

  7. #47
    Supporting Member Turbo Mopar Contributor Ondonti's Avatar
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    Re: 41TE/604 operated by Megasquirt

    Quote Originally Posted by 5DIGITS View Post
    Hello,
    The switches that are being referred to are the signals from the 'code plate'.
    This is what the transmission uses to determine the actual position of the manual valve.
    This is critical as various gears can be accomplished by various means based on where the manual valve resides.

    I have always been interested in this topic as I own a Mexican 41TE case which means it has the bell housing provision for the 2.2/2.5 rather than the later 2.4 due to the change in the starter bell location.
    Yes - the Autostick function was pathetic at best because there are three stages to the shift which delay response.
    They are split as such:

    Fast Fill - this is the shift stage that pre-fills the clutch to the upper touch point just prior to the build of torque capacity
    Torque phase - this is the second phase which duty cycles the PWM to achieve a point to begin the inertial phase
    Inertial phase - this is the speed change portion of the shift that moves us from one ratio to another

    What's awful about the aftermarket systems is that they do not replicate or support these phases - I'm attempting to correct this.
    I would love to see this correction! So much fiddling we can't do!
    Brent
    GREAT DEPRESSION RACING
    1992 Duster 3.0 The Junkyard- Now - Megasquirt II/Extra. OEM 10:1 3.0 n/a.
    - Old - 11.5@125 22psi $90 Stock 3.0 Junk Motor - 516whp 519wtq 20psi 91 oct built 3.0 stock n/a computer
    1994 Spirit 3.0 - 12.9@106 10 psi - Daily Holset He341 280whp 304ft/lb
    1994 Spirit 3.0 A670 - Wife's
    1990 Spirit 3.0 E.S. 41TE
    1993 Spirit 3.0 E.S. 41TE
    1994 Duster 3.0 A543
    1990 Lebaron Coupe 2.5 T1 31TH
    1981 Starlet KP61 Parts
    1983 Starlet KP61 Parked
    1998 Dodge 12v Cummins 47re 4x4 4dr longbed

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