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Thread: Force Motor Current Calibrations

  1. #21
    Senior Tuner Russ K's Avatar
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    I just zero out the 100 psi column on the stock force motor table. Then firm up the shifts by adding to the shift pressure tables (normal & perf) For the TCC, set the max table to 100 & the min table to 90. This gets rid of the TCC slip.

    Russ Kemp

  2. #22
    Advanced Tuner INTHERED's Avatar
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    Quote Originally Posted by XTrooper
    This is the Force Motor Current vs Pressure vs Temp table from a stock '98 C5 shown as an example. At Keith's suggestion (Thanks, amigo!) I just added this to my '00 C5's bin file and it corrected the issues I was having (throwing the P0748 - Pressure Control Solenoid Electrical DTC and super-harsh shifts at part-throttle). LS1-Edit corrupted my original table. :
    Hey Xtrooper

    What do your Desired Shift Time and Normal Shift Pressure tables
    look like. I have a 2000 C5 and have been running these tables stock
    at the track and was wondering what you use.

    Thanks >>>>> INTHERED
    LINGENFELTER MAGNACHARGED 2000 A4 Torch Red Z51 Vert, Smoothline HT, LPE IC Magnacharger, Z06 cam, LPE CNC heads, CC RPM kit, LPE hood, Yank 2800, Rossler trans, Z06 rear w/300Ms, Chrome C6 Z06 rims w/PS2s, Z06 calipers w/PF carbon metallics , Eradispeeds, WCC screens, BBK 80mm TB, TB bypass, 160 TS, GM Z06 MAF, Blackwing, Corsa Pace, AR headers X-pipe & Hiflow Cats, GM HP wires, NGK TR6s, Hptuned by INTHERED with a best 1/4 mile of 10.87 @ 128.90 mph on BFG DRs

  3. #23
    Advanced Tuner INTHERED's Avatar
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    Quote Originally Posted by XTrooper
    This is the Force Motor Current vs Pressure vs Temp table from a stock '98 C5 shown as an example. At Keith's suggestion (Thanks, amigo!) I just added this to my '00 C5's bin file and it corrected the issues I was having (throwing the P0748 - Pressure Control Solenoid Electrical DTC and super-harsh shifts at part-throttle). LS1-Edit corrupted my original table. :
    .................................................. ................................................
    1069 913 874 854 815 776 737 630 591 562 454 342 303 254 200 68 68 0
    I have looked at Force Motor Current tables from 1998 thru 2001 C5s and
    none of them match the table that Keith gave you. But one thing I noticed
    is that they do match the first 7 columns of your table and they all seem to
    be different from yours and each other in the last 10 columns. These yearly
    differences is this due to transmission hardware differences, driveablily issues
    or has GM learned over the years ?

    Thanks >>>>> INTHERED
    LINGENFELTER MAGNACHARGED 2000 A4 Torch Red Z51 Vert, Smoothline HT, LPE IC Magnacharger, Z06 cam, LPE CNC heads, CC RPM kit, LPE hood, Yank 2800, Rossler trans, Z06 rear w/300Ms, Chrome C6 Z06 rims w/PS2s, Z06 calipers w/PF carbon metallics , Eradispeeds, WCC screens, BBK 80mm TB, TB bypass, 160 TS, GM Z06 MAF, Blackwing, Corsa Pace, AR headers X-pipe & Hiflow Cats, GM HP wires, NGK TR6s, Hptuned by INTHERED with a best 1/4 mile of 10.87 @ 128.90 mph on BFG DRs

  4. #24
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    I think it just shows (as do MAF tables) that GM isn't
    above a little "fudging" to get a desired result, even
    if it brings in a little deviation from realism.

    The force motor table "should" be pretty much just a
    model of "what happens" and what is commanded,
    should be expressed elsewhere (especially now with
    the General Pressure stuff available). Although some
    tables have insanity in the 100% column that needs
    removed and I'd like to hear the rationale on that one;
    I need a chuckle.

  5. #25
    Advanced Tuner INTHERED's Avatar
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    Quote Originally Posted by jimmyblue
    The force motor table "should" be pretty much just a
    model of "what happens" and what is commanded, should be expressed elsewhere (especially now with the General Pressure stuff available). Although some tables have insanity in the 100% column that needs
    removed and I'd like to hear the rationale on that one;
    I need a chuckle.
    I think I have the latest revision of Hptuner but it is blank under the
    general pressure tab ?
    LINGENFELTER MAGNACHARGED 2000 A4 Torch Red Z51 Vert, Smoothline HT, LPE IC Magnacharger, Z06 cam, LPE CNC heads, CC RPM kit, LPE hood, Yank 2800, Rossler trans, Z06 rear w/300Ms, Chrome C6 Z06 rims w/PS2s, Z06 calipers w/PF carbon metallics , Eradispeeds, WCC screens, BBK 80mm TB, TB bypass, 160 TS, GM Z06 MAF, Blackwing, Corsa Pace, AR headers X-pipe & Hiflow Cats, GM HP wires, NGK TR6s, Hptuned by INTHERED with a best 1/4 mile of 10.87 @ 128.90 mph on BFG DRs

  6. #26
    Супер Модератор EC_Tune's Avatar
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    May not be available for your O/S yet (or possibly at all). Stay tuned...
    Always Support Our Troops!

  7. #27
    Advanced Tuner INTHERED's Avatar
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    Quote Originally Posted by EC_Tune
    May not be available for your O/S yet (or possibly at all). Stay tuned...
    If that area is blank then I have no way of controlling line pressure when
    the transmission is under load but not shifting ?

    Thanks >>>> INTHERED
    LINGENFELTER MAGNACHARGED 2000 A4 Torch Red Z51 Vert, Smoothline HT, LPE IC Magnacharger, Z06 cam, LPE CNC heads, CC RPM kit, LPE hood, Yank 2800, Rossler trans, Z06 rear w/300Ms, Chrome C6 Z06 rims w/PS2s, Z06 calipers w/PF carbon metallics , Eradispeeds, WCC screens, BBK 80mm TB, TB bypass, 160 TS, GM Z06 MAF, Blackwing, Corsa Pace, AR headers X-pipe & Hiflow Cats, GM HP wires, NGK TR6s, Hptuned by INTHERED with a best 1/4 mile of 10.87 @ 128.90 mph on BFG DRs

  8. #28
    Супер Модератор EC_Tune's Avatar
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    General pressure is the adaptive modes. Currently N/A on your operating system.

    Check the Shift Properties tab. That is your shift pressures tab.
    Always Support Our Troops!

  9. #29
    Advanced Tuner INTHERED's Avatar
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    Quote Originally Posted by Ken@HPTuners
    These tables are what to expect in trans line pressure vs the current applied to the solenoid.Far left column is the current in milliamps. Second column is the line pressure

    Document ID# 512029
    1999 Chevrolet/Geo Corvette * *

    Line Pressure (4L60-E) Pressure Control Solenoid Current (Milliamp)
    Approximate Line Pressure (PSI)

    4.8L/5.0L/5.3L/5.7L

    000 * * *198-227
    100 ** * *197-226
    200 ** * *189-221
    300 ** * *181-216
    400 ** * *168-205
    500 ** * *154-193
    600 ** * *137-175
    700 ** * *114-156
    800 ** * *90-132
    900 ** * *64-105
    1000 * * *53-85
    Ken

    I do not understand how the above table at 000 & 100 miliamps of current
    essentially can have the same line pressures. I mean if 0 miliamps is 227 lbs
    of pressure then what pressure will I have at 100 miliamps ?

    Thanks >>>>> INTHERED
    LINGENFELTER MAGNACHARGED 2000 A4 Torch Red Z51 Vert, Smoothline HT, LPE IC Magnacharger, Z06 cam, LPE CNC heads, CC RPM kit, LPE hood, Yank 2800, Rossler trans, Z06 rear w/300Ms, Chrome C6 Z06 rims w/PS2s, Z06 calipers w/PF carbon metallics , Eradispeeds, WCC screens, BBK 80mm TB, TB bypass, 160 TS, GM Z06 MAF, Blackwing, Corsa Pace, AR headers X-pipe & Hiflow Cats, GM HP wires, NGK TR6s, Hptuned by INTHERED with a best 1/4 mile of 10.87 @ 128.90 mph on BFG DRs

  10. #30
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    Quote Originally Posted by INTHERED
    Ken

    I do not understand how the above table at 000 & 100 miliamps of current
    essentially can have the same line pressures. I mean if 0 miliamps is 227 lbs
    of pressure then what pressure will I have at 100 miliamps ?

    Thanks >>>>> INTHERED

    That is the physical limit of the solenoid control.

  11. #31
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    The spring has some seat pressure and 100mA may
    be below the threshold to take the bypass valve off
    seat.

  12. #32
    Advanced Tuner INTHERED's Avatar
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    Quote Originally Posted by Ken@HPTuners
    That is the physical limit of the solenoid control.
    Then why do people go to the trouble of setting the current to 68 miliamps or 95 ma or 150 ma in the 96 percent column of the FMC table If all three setting could wind up being the exact same pressure ?

    INTHERED
    Last edited by INTHERED; 11-02-2006 at 03:46 PM.
    LINGENFELTER MAGNACHARGED 2000 A4 Torch Red Z51 Vert, Smoothline HT, LPE IC Magnacharger, Z06 cam, LPE CNC heads, CC RPM kit, LPE hood, Yank 2800, Rossler trans, Z06 rear w/300Ms, Chrome C6 Z06 rims w/PS2s, Z06 calipers w/PF carbon metallics , Eradispeeds, WCC screens, BBK 80mm TB, TB bypass, 160 TS, GM Z06 MAF, Blackwing, Corsa Pace, AR headers X-pipe & Hiflow Cats, GM HP wires, NGK TR6s, Hptuned by INTHERED with a best 1/4 mile of 10.87 @ 128.90 mph on BFG DRs

  13. #33
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    Some food for thought...

    Question: Why change the force motor calibration tables at all?

    Ive been working alot with the earlier 93+ OBD-1 PCMs that support the 4L60/80-E's and the FM calibration table (or tables) is only really there to serve as a transfer function for converting the desired added line pressure into mA for the force motor. These are really part of the force motor PID calibration and shouldnt be touched IMO. This table serves really to linearize the action of the desired line pressure.

    To me, it seems that the correct way would be to adjust the load and speed based added desired line pressures.

  14. #34
    Why does the force motor line pressure % pid only go to 38% @ max load. The milliamps at that point are .04 or close enough to zero which would suggest the 100% commanded line pressure coloum is being used. I navigate my position in the table by trans temp and milliamps but it would be nice to know why the force motor line pressure % max's out at 38%

  15. #35
    Advanced Tuner n0dih's Avatar
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    Just for comparisson, attached is my 94 Cadillac Fleetwood Brougham V4P (7000 lb tow package) 4L60E Force Motor Current tables. IIRC, all 1994-1995 Corvette, Impala SS, Caprice 9C1, Roadmaster, and Fleetwoods used the same.

  16. #36
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    Quote Originally Posted by Paul@G&D Performance
    Why does the force motor line pressure % pid only go to 38% @ max load. The milliamps at that point are .04 or close enough to zero which would suggest the 100% commanded line pressure coloum is being used. I navigate my position in the table by trans temp and milliamps but it would be nice to know why the force motor line pressure % max's out at 38%
    If the table doesnt look right, I wouldnt touch it. Theres always the possibility of an incorrect offset being used, or it being different.

    As I said above you REALLY dont want to mess with those force motor tables. The whole antiflare adaptive modifier PID routine and all the desired line pressure tables and associated logic rely on the force motor calibration tables to be correct. Those two tables should be left unmolested. For tuning, the desired added line pressure tables and desired shift time tables should be used exclusivly.
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  17. #37
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    Instead of 1245 in the 100 column just make the value 0?

  18. #38
    Potential Tuner JSS06C6's Avatar
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    Quote Originally Posted by Gibbs1982 View Post
    Instead of 1245 in the 100 column just make the value 0?
    I've got the same question.. I'm experiencing major slip under boost with the 4L60e in this build. don't know if it's TCC or the clutches in the trans or is it in my transmission tune..
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