diff --git a/Documentation/User Manual/1-user-interface/O_IHPC.md b/Documentation/User Manual/1-user-interface/O_IHPC.md
index 10c4093aaf4a6091f4a8fcea92842fdd0db039e8..e7969a7d5eced477216bccb97df2854a85a34b4f 100644
--- a/Documentation/User Manual/1-user-interface/O_IHPC.md	
+++ b/Documentation/User Manual/1-user-interface/O_IHPC.md	
@@ -7,7 +7,6 @@
 
 Integrated hybrid electric vehicle powertrain component (IHPC) means a combined system of multiple electric machine systems together with the functionality of a multi-speed gearbox.
 
-For an IHPC the 
 
 ### Relative File Paths
 
@@ -22,7 +21,7 @@ Make and Model
 :   Free text defining the gearbox model, type, etc.
 
 Inertia \[kgm²\]
-:   Rotational inertia of the gearbox (constant for all gears). (Engineering mode only)
+:   Rotational inertia of the electric machine defined at the output shaft of the EM. (Engineering mode only)
 
 Gears
 :   Gear ratios of the transmission steps of the IEPC
diff --git a/VECTO/GUI/GearboxForm.vb b/VECTO/GUI/GearboxForm.vb
index 1b87e30a3823039e40dca7becd63815753017baf..3d9d82cfbea95dcaac89a9a45569a788baeccb4d 100644
--- a/VECTO/GUI/GearboxForm.vb
+++ b/VECTO/GUI/GearboxForm.vb
@@ -89,7 +89,7 @@ Public Class GearboxForm
         Else
             CbGStype.DataSource = [Enum].GetValues(GetType(GearboxType)) _
                 .Cast(Of GearboxType)() _
-                .Where(Function(type) type.ManualTransmission() OrElse type.AutomaticTransmission()) _
+                .Where(Function(type) type.ManualTransmission() OrElse type.AutomaticTransmission() OrElse type = GearboxType.IHPC) _
                 .Select(Function(type) New With {Key .Value = type, .Label = type.GetLabel()}).ToList()
         End If
         DeclInit()
@@ -140,7 +140,7 @@ Public Class GearboxForm
     Private Sub ToolStripBtOpen_Click(sender As Object, e As EventArgs) Handles ToolStripBtOpen.Click
         If GearboxFileBrowser.OpenDialog(_gbxFile) Then
             Try
-                OpenGbx(GearboxFileBrowser.Files(0), VehicleCategory.RigidTruck)
+                OpenGbx(GearboxFileBrowser.Files(0), VehicleCategory.RigidTruck, VectoSimulationJobType.ConventionalVehicle)
             Catch ex As Exception
                 MsgBox("Failed to open Gearbox File: " + ex.Message)
             End Try
@@ -242,7 +242,7 @@ Public Class GearboxForm
     End Sub
 
     'Open file
-    Public Sub OpenGbx(file As String, vehicleCategory As VehicleCategory)
+    Public Sub OpenGbx(file As String, vehicleCategory As VehicleCategory, vehicleJobType As VectoSimulationJobType)
 
         If ChangeCheckCancel() Then Exit Sub
 
@@ -254,6 +254,7 @@ Public Class GearboxForm
 		Dim axlegear As IAxleGearInputData = vehicle.Components.AxleGearInputData
 
         _vehicleCategory = vehicleCategory
+        _vehicleJobType = vehicleJobType
 
         If Cfg.DeclMode <> gearbox.SavedInDeclarationMode Then
             Select Case WrongMode()
@@ -713,6 +714,7 @@ Public Class GearboxForm
 
     Private _contextMenuFiles As String()
     Private _vehicleCategory As VehicleCategory
+    private _vehicleJobType as VectoSimulationJobType
 
     Private Sub OpenFiles(ParamArray files() As String)
 
@@ -1075,7 +1077,8 @@ Public Class GearboxForm
         Dim tmpRunData as VectoRunData = New VectoRunData() With {
             .GearboxData = New GearboxData() with {
                 .Type = CType(CbGStype.SelectedValue, GearboxType)
-            }
+            },
+            .JobType = _vehicleJobType
         }
         Dim tmpStrategy as IShiftPolygonCalculator = PowertrainBuilder.GetShiftStrategy(new SimplePowertrainContainer(tmpRunData))
             
diff --git a/VECTO/GUI/MainForm.vb b/VECTO/GUI/MainForm.vb
index bdfd5b7c7470cd88b6a743ceb0ec059e522f1ce8..dcd784a7afba838e843472e0e2d064175780447e 100644
--- a/VECTO/GUI/MainForm.vb
+++ b/VECTO/GUI/MainForm.vb
@@ -405,7 +405,7 @@ Public Class MainForm
                         GearboxForm.BringToFront()
                     End If
                     Try
-                        GearboxForm.OpenGbx(file, VehicleCategory.RigidTruck)
+                        GearboxForm.OpenGbx(file, VehicleCategory.RigidTruck, VectoSimulationJobType.ConventionalVehicle)
                     Catch ex As Exception
                         MsgBox("Failed to open Gearbox File: " + ex.Message)
                     End Try
diff --git a/VECTO/GUI/VectoJobForm.vb b/VECTO/GUI/VectoJobForm.vb
index 667589cdfe467474ae01c3f2e037ce2ce5d13569..24f05e99539b69f13b1e1a961667ed776dd5a2d7 100644
--- a/VECTO/GUI/VectoJobForm.vb
+++ b/VECTO/GUI/VectoJobForm.vb
@@ -330,19 +330,22 @@ Public Class VectoJobForm
             GearboxForm.BringToFront()
         End If
         Dim vehicleType As VehicleCategory
+        Dim jobType as VectoSimulationJobType
         Try
             If Not Trim(f) = "" Then
-                Dim vehInput As IVehicleDeclarationInputData =
+                Dim vehInput As IVehicleEngineeringInputData =
                         CType(JSONInputDataFactory.ReadComponentData(FileRepl(TbVEH.Text, GetPath(VectoFile))),
                             IEngineeringInputDataProvider).JobInputData.Vehicle
                 vehicleType = vehInput.VehicleCategory
+                jobType = vehInput.VehicleType
             End If
 
         Catch ex As Exception
             vehicleType = VehicleCategory.RigidTruck
+            jobType = VectoSimulationJobType.ConventionalVehicle
         End Try
         Try
-            If Not Trim(f) = "" Then GearboxForm.OpenGbx(f, vehicleType)
+            If Not Trim(f) = "" Then GearboxForm.OpenGbx(f, vehicleType, jobType)
         Catch ex As Exception
             MsgBox("Failed to open Gearbox File: " + ex.Message)
         End Try
diff --git a/VECTO/GUI/VehicleForm.vb b/VECTO/GUI/VehicleForm.vb
index fca9c419a0ecfc15acbe58987d51abaf33dbeb9f..f0eeab8f8baff1444a04eac4c92116682a461002 100644
--- a/VECTO/GUI/VehicleForm.vb
+++ b/VECTO/GUI/VehicleForm.vb
@@ -722,7 +722,7 @@ Public Class VehicleForm
 				tcVehicleComponents.TabPages.Remove(tpIEPC)
 
 				gbEMTorqueLimits.Enabled = False
-				gbPropulsionTorque.Enabled = False
+				gbPropulsionTorque.Enabled = True
 
 			    'PTO
 			    gbPTO.Enabled = False
diff --git a/VectoCommon/VectoCommon/Models/GearboxType.cs b/VectoCommon/VectoCommon/Models/GearboxType.cs
index c426a29273860b857b5fbe6b0fb7e5294c2e6c3a..c00d2504d1e301660e323a96ce709de46bf1fa83 100644
--- a/VectoCommon/VectoCommon/Models/GearboxType.cs
+++ b/VectoCommon/VectoCommon/Models/GearboxType.cs
@@ -57,6 +57,7 @@ namespace TUGraz.VectoCommon.Models
 				case GearboxType.ATSerial:     return "Automatic Transmission - Serial (AT-S)"; //todo mk20211210 shouldn't we call it APT-S?
 				case GearboxType.ATPowerSplit: return "Automatic Transmission - PowerSplit (AT-P)";//todo mk20211210 shouldn't we call it APT-P?
 				case GearboxType.APTN:         return "Automatic Transmission - No Torque Converter (APT-N)";
+				case GearboxType.IHPC:         return "IHPC Transmission";
 				case GearboxType.DrivingCycle: return "Gear from Driving Cycle";
 				default: throw new ArgumentOutOfRangeException("GearboxType", type, null);
 			}
diff --git a/VectoCore/VectoCore/Models/Declaration/DeclarationData.cs b/VectoCore/VectoCore/Models/Declaration/DeclarationData.cs
index e1a1df6060175f20782778f6fd4373d4fabc36c6..cebc43f320d6d5180068379690145a14cdb57579 100644
--- a/VectoCore/VectoCore/Models/Declaration/DeclarationData.cs
+++ b/VectoCore/VectoCore/Models/Declaration/DeclarationData.cs
@@ -577,6 +577,7 @@ namespace TUGraz.VectoCore.Models.Declaration
 				switch (type) {
 					case GearboxType.AMT:
 					case GearboxType.APTN:
+					case GearboxType.IHPC:
 						// TODO MQ: 2020-10-14: compute for AMT with ICE and AMT with EM differently
 						return ComputeEfficiencyShiftPolygon(gearIdx, fullLoadCurve, gears, engine, axlegearRatio, dynamicTyreRadius);
 					case GearboxType.MT: