TurboLamik TurboLamik

Parameters / Torque Reduction

Torque Reduction

The shift-cut request the TCU sends the engine ECU during a shift: how much, for how long, and per shift type.

17 parameters: 9 documented, 8 not yet documented. 3 exist only on firmware 10.77.

17 parameters

Adaptation of the torque reduction time

# 0x6CF0 1×1
Threshold for adapting the torque-cut timing: the row label TQ> and the shipped value (300) suggest the gearbox torque above which this adaptation applies. Exact behaviour is undocumented.
Manual: Shift quality See also: 0x30D0 · 0x7DD4
Detail

From the official base maps what they contain, not what it does

Every official base map ships 300.

Address
0xE7C 3708
Size
1×1 value
Width
16-bit
Firmware
10.75, 10.77

Ramp OFF TQ Correction

# 0x177F 1×10
No explanation exists yet.

From the official base maps what they contain, not what it does

Values differ between official base maps (3 distinct variants); across all 16 they span 40 to 200.

Indexed by columns 100 to 1000 NM in 10 steps.

Detail
Address
0x1A18 6680
Size
1×10 cells
Width
16-bit
Firmware
10.75, 10.77

Ramp ON TQ Correction

# 0x3B16 1×10
No explanation exists yet.

From the official base maps what they contain, not what it does

Values differ between official base maps (3 distinct variants); across all 16 they span 40 to 250.98.

Indexed by columns 100 to 1000 NM in 10 steps.

Detail
Address
0x1A04 6660
Size
1×10 cells
Width
16-bit
Firmware
10.75, 10.77

Torqie Reduction synchronization point (Normal Drive)

# 10.77 only 0x95A 1×1
Not documented yet.
Detail
Address
0x2578 9592
Size
1×1 value
Width
8-bit
Firmware
10.77

Torqie Reduction synchronization point (Sport1)

# 10.77 only 0x617 1×1
Not documented yet.
Detail
Address
0x25AA 9642
Size
1×1 value
Width
8-bit
Firmware
10.77

Torqie Reduction synchronization point (Sport2)

# 10.77 only 0xAE0 1×1
Not documented yet.
Detail
Address
0x25DC 9692
Size
1×1 value
Width
8-bit
Firmware
10.77

Torque Reduction Advance Time

# 0x654B 1×7
No explanation exists yet.

From the official base maps what they contain, not what it does

Values differ between official base maps (4 distinct variants); across all 16 they span 30 to 80.

Indexed by columns 2 to 8 GEAR in 7 steps.

Detail
Address
0xE80 3712
Size
1×7 cells
Width
16-bit
Firmware
10.75, 10.77

Torque Reduction Ramp OFF

# 0x6E28 1×1
No explanation exists yet.

From the official base maps what they contain, not what it does

Every official base map ships 20.08.

Detail
Address
0x1804 6148
Size
1×1 value
Width
8-bit
Firmware
10.75, 10.77

Torque Reduction Ramp ON

# 0x147E 1×1
No explanation exists yet.

From the official base maps what they contain, not what it does

Official base maps ship 40.16 on 8HP45, 8HP50, 8HP70, 8HP75; 8.03 on 8HP90; 30.12 on 8HP51.

Detail
Address
0x1803 6147
Size
1×1 value
Width
8-bit
Firmware
10.75, 10.77

Torque Reduction Table "0"

# 0x384A 10×17
One of three torque-reduction maps selected by the TQ R.T. row of the Program Selector. Cells are the percentage of engine torque KEPT during a shift: 100% = no cut (sharpest), 0% = full cut (smoothest).
Manual: Program tuning See also: 0x45F8 · Torque Reduction Table "1" · TQ Reduction Table Selection
Detail

TurboLamik XDF

Torque Reduction applies in the percent of Torque TCU demands at UP shift 100% torque- No torque reduction 0% torque- Max Torque Reduction X axis, engine speed Y axis, gearbox torque

From the official base maps what they contain, not what it does

Values differ between official base maps (5 distinct variants); across all 16 they span 27.34 to 100.

Indexed by rows 200 to 1000 NM in 10 steps, columns 500 to 8000 RPM in 17 steps.

Address
0x1806 6150
Size
10×17 cells
Width
8-bit
Firmware
10.75, 10.77

Torque Reduction Table "1"

# 0x1435 10×17
One of three torque-reduction maps selected by the TQ R.T. row of the Program Selector. Cells are the percentage of engine torque KEPT during a shift: 100% = no cut (sharpest), 0% = full cut (smoothest).
Manual: Program tuning See also: 0x45F8
Detail

TurboLamik XDF

Torque Reduction applies in the percent of Torque TCU demands at UP shift 100% torque- No torque reduction 0% torque- Max Torque Reduction X axis, engine speed Y axis, gearbox torque

From the official base maps what they contain, not what it does

Values differ between official base maps (5 distinct variants); across all 16 they span 25 to 100.

Indexed by rows 200 to 1000 NM in 10 steps, columns 500 to 8000 RPM in 17 steps.

Address
0x18B0 6320
Size
10×17 cells
Width
8-bit
Firmware
10.75, 10.77

Torque Reduction Table "2"

# 0x1994 10×17
One of three torque-reduction maps selected by the TQ R.T. row of the Program Selector. Cells are the percentage of engine torque KEPT during a shift: 100% = no cut (sharpest), 0% = full cut (smoothest).
Manual: Program tuning See also: 0x45F8 · Torque Reduction Table "1" · TQ Reduction Table Selection
Detail

TurboLamik XDF

Torque Reduction applies in the percent of Torque TCU demands at UP shift 100% torque- No torque reduction 0% torque- Max Torque Reduction X axis, engine speed Y axis, gearbox torque

From the official base maps what they contain, not what it does

Values differ between official base maps (5 distinct variants); across all 16 they span 32.81 to 100.

Indexed by rows 200 to 1000 NM in 10 steps, columns 500 to 8000 RPM in 17 steps.

Address
0x195A 6490
Size
10×17 cells
Width
8-bit
Firmware
10.75, 10.77

TQ Reduction Table Selection

# 0x8E5 3×7
Per-gear redirect of the torque-reduction table: for each TQ R.T. value (0-2) and gear, the cell picks which of the three tables actually applies. Lets one program cut differently on different shifts.
Manual: Program tuning See also: 0x45F8 · Torque Reduction Table "1"
Detail

TurboLamik XDF

Selects which "Torque Reduction Table" being used for each specific gear on X axis. In the Y axis row, TQ Reduction mode in use from Program Selector's TQ Reduction mode 0, 1 or 2.

From the official base maps what they contain, not what it does

Values differ between official base maps (3 distinct variants); across all 16 they span 0 to 255.

Address
0x1F7D 8061
Size
3×7 cells
Width
8-bit
Firmware
10.75, 10.77
10.75 name
Selector/ Gear swap TQ

TQ Reduction Test

# 0x39AE 1×1
Test modes for the torque-cut output: 0 off, 1/2 force a 100% cut from the footbrake or up button, 3/4 the same triggers using the real table values, 5 permanently on. Use it to confirm the cut actually reaches the ECU before trusting it in a shift.
Manual: Program tuning
Detail

TurboLamik XDF

0-OFF 1-Foot brake activation, 100% tq reduction 2-UP paddels activation, 100% tq reduction 3-Footbrake activation, uses values from the table 4-UP paddels activation, uses values from the table 5- ON

From the official base maps what they contain, not what it does

Every official base map ships 0.

Address
0x6E5 1765
Size
1×1 value
Width
8-bit
Firmware
10.75, 10.77

CAN 1

Torque reduction type (Only for OEM Can)

# 0x6876 1×1
During a shift the TCU asks the engine over CAN to drop torque, smoothing the shift and easing clutch stress; this picks how an OEM ECU executes that cut. 1 = fuel reduction only (diesel) or ignition retard only (petrol), 2 = the same plus a boost-pressure reduction, 0 = torque reduction off. Only for an OEM CAN profile (the engine-CAN codes 20 and up); the vendor lists BMW EXX and Mercedes 5G-Tronic, and on a standalone profile it does nothing.
The cut only lands if the engine ECU honours the request. No handshake means harsher, hotter shifts that the clutch calibration has to absorb.
See also: 0x50F9 · Torque Reduction Table "1" · Torque Reduction Output
Detail

TurboLamik XDF

0- Deactivation of torque reduction 1- For diesel: Fuel reduction only. For gasoline: Only the reduction of the ignition advance angle 2-For diesel: Reduction of fuel and boost Presssure. For gasoline: Reduction of the ignition advance angle and boost Presssure Works on BMW EXX series and Mercedes 5G-Tronic

From the official base maps what they contain, not what it does

Every official base map ships 1.

Address
0x1805 6149
Size
1×1 value
Width
8-bit
Firmware
10.75, 10.77

Output 2

Torque Reduction Output

# 0x3131 1×1
Puts the shift torque-cut request on a hardwired AUX pin (1-12, 0 = off) for ECUs that take a wired cut input instead of CAN. The pin goes active when the torque-reduction table value drops below the threshold set next to it. AUX2 is pin 33 (low-side).
Manual: Shift quality See also: Torque Reduction Output threshold · 0x4242 · Torque Reduction Table "1"
Detail

TurboLamik XDF

0 - OFF 1 to 12 - Aux 1 to 12 13 - OFF

From the official base maps what they contain, not what it does

Official base maps ship 5 on 8HP45, 8HP50, 8HP51, 8HP75; 2 on 8HP70, 8HP90.

Address
0x17B9 6073
Size
1×1 value
Width
8-bit
Firmware
10.75, 10.77

Torque Reduction Output threshold

# 0xE77 1×1
The trigger level for the torque-reduction output: the pin is active while the Torque Reduction Table value is below this threshold. The tables hold the percentage of torque kept (100% = no cut), so the output fires exactly while a cut is being requested.
Manual: Shift quality See also: Torque Reduction Output · Torque Reduction Table "1"
Detail

TurboLamik XDF

The output and CAN Torque Reduction state is active when the condition is met: "Torque Reduction Table percent value is below "Torque Reduction Output threshold"

From the official base maps what they contain, not what it does

Every official base map ships 88.28.

Address
0x1802 6146
Size
1×1 value
Width
8-bit
Firmware
10.75, 10.77
10.75 name
Torque Reduction Output Threshold

Names and groups follow the TurboLamik XDF. Values are not published here: open your own .bin in Map Studio to see what your map actually holds, and verify anything you change against the official manual.