8HP related links
•8HP torque converter control.
The TCU firmware consist of the internal flash, which has the program "code" and the "maps" memory area and the EEPROM area.
A special tool needs to be used to reflash the whole memory area, normal flash tools only flashes the "maps" area, see 8HP reflash procedure.
Most important feature list
Setting |
OE Dodge |
MaxxECU custom Dodge |
Note |
Max engine RPM |
7650rpm |
9200rpm |
Make sure your gearbox is capable of revving this high... |
Controlable shift RPM |
- |
1500-9000rpm |
|
Transbrake RPM |
1400/2500rpm |
1200/7000rpm |
DRAG mode only |
Max transbrake torque |
800Nm |
1547Nm |
Make sure your converter wont burn up... |
Transbrake gears |
1+2, only D1 |
1+R or 2+R, D or M |
Selectable using the digital input Transmission Gear 1 lockout |
Transbreake Timeout |
short |
25 seconds |
Make sure your converter wont burn up... |
Drive mode maps |
uses ALOT |
uses 4 shift maps |
STREET (D) = 5, SPORT (D) = 7, TRACK/DRAG (D) / WOT = 9. M/paddles = 31 |
Manual shiftpoints |
|
9000rpm or revlimiter value. |
Selectable upshift method on manual mode, see MTune 8HP Settings |
Shift maps |
100 |
5 |
8HP 45/70/90 latest files
Since the 8HP control is in public BETA, we need to have control and take care of each customer to make sure it is all working.
Please email support@maxxecu.com, attach screnshot of the TCU ident + binary readouts of internal flash + eeprom, provide vehicle information of the gearbox origin, see 8HP reflash procedure.
Note: do NOT try to use any of these code/calibrations together with OE Dodge or any other ECU/PCM; it will not work and might trash your gearbox. ONLY for MaxxECU EMS.
Changelog
Binary 4 (with MAPS 003)
•Internal clutch control to support Transbrake bump, Launch Control strategy and Clutchkick feature.
•Individual clutch, line, and converter pressure are now transmitted to MaxxECU; see 8HP RealTime Data.
•Option to prevent automatic downshifts in manual mode, see MTune 8HP Settings.
•CAN performance optimization.
•CAN ID reorganized to prevent CAN collisions in most common vehicles and modules; see CAN list.
•Eliminating the P1601 and Disabled ERM.
•Reduced line pressure on P/R/N/1.
•PRND now only uses one clutch, and optimized all clutch MIN pressures to smooth the transition.
•Changed soft-start clutch control parameters.
•Lowered trans temp warning from 130 to 110 degrees C.
•Transbrake min oil temp changed from 25 to 20 deg C.
•Increased the max allowed transbrake time from 15 seconds to 25 seconds.
•Increased the allowed wheel speed for transbrake.
•Increased the min/max reported torque during transbrake to 1000-1530Nm.
•Changed the minimal engine speed for transbrake to 600rpm.
•Changed the max global OSS for transbrake.
•Hundreds of other minor adjustments.
Below information for the older format where we separated program code and the calibration area.
Program code
(Sorry, we will not disclosure exactly what we have done here....)
Binary 3
•Support for the Transmission Gear 1 lockout function, which includes transbrake selection.
•Transbrake selection from MaxxECU using 1+R or 2+R.
Binary 2
Transbrake using gear 1+R.
Binary 1
Transbrake using 1+2.
Calibration area
MAPS 002 (requires 1.151 ECU firmware)
•Improved shift speed.
•Lowered line pressure targets for PRND.
•Downshift prevention in manual mode is now controlled from MaxxECU revlimit.
•AMAX removed.
•TCC slip pattern adjustments.
MAPS 001
[TRANS DIAG]
•Removed DTC: U11E3
•Removed DTC: P1DCA
•Removed DTC: P1B13
•Removed DTC: U1267
•Removed DTC: U0103
•Removed DTC: U0001
•Removed DTC: U11E4
•Removed DTC: P1DF3 (internal ECU init error).
[GENERAL]
•TCM RPM Limit changed to 9200rpm.
•Counter timeout for CAN init increased.
•Lower voltage threshold lowered.
•Kickdown pedal activation value changed.
[SHIFT SCHEDULING]
•Trans shift pattern 9 (Drive mode) change to 6000,6800,7000,7200,7200,7200,7200 engine rpm limit.
•Shift pattern mapping changed: STREET (D) = 5, SPORT (D) = 7, TRACK/DRAG (D) / WOT = 9. M/paddles = 31
•OSS Limits, Max engine speed, rescale of axis and change of table values for all upshift values.
[SHIFT PRESSURES - GENERAL]
•Base line pressures, desired line pressure, max mode offset changed from 0 to 2.
•Trans desired line pressure all gear raised at higher torque values.
•Line pressure change on P,R,N,D for smoother shift operations.
[SHIFT PRESSURES - UPSHIFT]
•Minimum line pressure changed for all gears from 9bar to 11bar
•Nominal slip times adjusted.
•Fill time adjusted.
•Ramp time adjusted.
[SHIFT PRESSURES - DOWNSHIFT]
•Minimum line pressure changed for all gears from 9bar to 11bar
•Nominal Slip time adjusted.
[TORQUE MANAGEMENT - GENERAL]
•TCC limit disabled.
•Max torque limit, slip torque changed from 460Nm to 1547Nm.
•Max torque limit, error torque changed from 200Nm to 1547Nm.
•Max torque limit, max input shaft torque changed from 715Nm to 1547Nm
•Max torque limit, engagement clutch changed from 1000Nm to 1547Nm
•Max torque limit shift, overall max input torque changed in table to 1547Nm.
•Max torque limit, gear based normal, changed from 760Nm to 1547Nm on all forward gears.
•Max torque limit, temperature based gear 1 to 8, normal temp raised from 750Nm to 1547Nm.
•Max torque limit, converter temp based, gear 1 to 8 normal temp changed from 700Nm to 1547Nm.
•Max torque limit, clutch based temp limit, 0 to 200 deg C changed from 750 t0 1547Nm.
[TORQUE MANAGEMENT - UPSHIFT]
•Torque limit for all gears raised from 1000Nm to 1547Nm
•Max torque limit upshift table, values raised.
•Added torque intervention values for higher turbine speeds SPORT mode 1-2
•Added torque intervention values for higher turbine speeds SPORT mode 2-3
•Added torque intervention values for higher turbine speeds SPORT mode 3-4
•Added torque intervention values for higher turbine speeds SPORT mode 4-5
•Added torque intervention values for higher turbine speeds MAX mode 1-2
•Added torque intervention values for higher turbine speeds MAX mode 2-3
•Added torque intervention values for higher turbine speeds MAX mode 3-4
•Added torque intervention values for higher turbine speeds MAX mode 4-5
•Added torque intervention values for higher turbine speeds MAX mode 5-6
•Added torque intervention values for higher turbine speeds MAX mode 6-7
•Added torque intervention values for higher turbine speeds MAX mode 7-8
[TORQUE MANAGEMENT - DOWNSHIFT]
•Max torque limit stacked downshift table data changed from 1300Nm to 1547Nm, and added a few more cells with data.
•Removed a few -200Nm points.
[TRANSBRAKE]
•Max activation RPM changed to 7000rpm.
•Max output speed for protection changes from 8120 to 9800rpm.
•Max torque changed from 1000Nm to 1520Nm.
•MIN transmission oil temp changed from 50 to 25 deg C.
•Timeout increased to 15 seconds.
MAPS 000
Dodge DEMON internal flash + EEPROM.
