The 8HP control is not yet released, we are currently in BETA stage, but will be included in the next MTune 1.150 update in april 2024. Please be patient. Info pages are not yet completed and will be updated.
8HP related links
•8HP torque converter control.
8HP settings
Gearbox TCU
Specifies the TCU firmware the TCU is flashed with.
Dodge DEMON 8HP70 TCU (MaxxECU custom TCU fw) - See 8HP TCU firmware.
Shifter type
Specifies which shifter to be used, see 8HP shifter.
•OE Dodge shifter - The supported Dodge shifter is available on the bus.
•shifter emulation - Uses digital inputs to control the shiftings, see 8HP shifter emulation.
•BMW Fxx 8HP shifter - BMW F-series 8HP shifter is available on the bus.
SPEED source
Specifies which speed source MaxxECU will use to transmit vehicle speed to the TCU.
•MaxxECU vehicle speed (VSS) - Uses the vehicle speed within the system to be transmitted to the TCU, be sure it have it accurately calibrated, otherwise you will get an output shaft speed error code.
•Simulated from gearbox output shaft speed - When selected, MaxxECU uses the driveshaft output RPM, entered final gear ratio and wheel circumference to transmit a proper vehicles speed to the TCU.
gearbox mode
Sets the gearbox mode which changes the behavior of the shifts.
•STREET- (1).
•SPORT- (3).
•TRACK- (5).
•DRAG - (10). Required to be set to get transbrake feature, only available on the DEMON based firmwares.
•set from analog input/user table - Used to set the different gearbox modes from a analog input or a user table.
Example to set the gearbox drivemodes from the tune selector (using a User tables). Tune selector 1/2 --> STREET (1), Tune selector 3 --> SPORT (3), Tune selector 4/5 --> TRACK(5) and Tune selector 6 --> DRAG(10), see 8HP RealTime Data.
Note: MaxxECU only accepts the values: 1,3,5 and 10 into this analog channel.
Example on how to verify the actual Dodge 8HP drivemode.
8HP shifting options
shift strategy
Specifies if the TCU has an supported or unsupported MAPS memory area.
•MaxxECU TCU maps (1500-9000rpm) using shift point table - Requires our custom MAPS TCU tune, see 8HP TCU firmware and the actual shift points is using the MaxxECU table.
•Custom TCU tune - For anyone with HPtuners who wants to custom tune the maps area, this is your option, but it is not recommended, since we cannot verify or validate the maps to be accurate or even good in the TCU.
Note: if custom tcu tune is selected above, the MTune 8HP Control, auti shifts targets are NOT USED.
Blip delay
MaxxECU activates the internal blip trigger when the gearbox downshifts, this specifies the amount of delay in milliseconds to allow the clutch to disengage the seated gear. 0 to 100ms.
8HP kickdown
enable kickdown above TPS
Specifies the minimum throttle position (pedal position if using E-Throttle) where we send the kickdown event to the TCU.
Note: blip request OVER this TPS value is not possible.
Kickdown lower limit gear
Specifies the minimum gear a downshift can downshift to. Start of high when testing this to make sure you are not downshifting too much which will cause it is up shift directly after the downshift because of he engine rpm limit.
Note: We are also internally calculating which gear it is possible to downshift to based on shift target RPM table (target gear) and the actual engine rpm limiter to prevent overshooting.
TCU error handling
8HP Auto erase TCU DTC
Specifies whether to erase all error codes in the TCU at ECU startup.
•Erase tcu dtc upon startup
•do not erase tcu dtc
Note: This option might interefere with any other diagnostic tool/HPTuners.
