diff --git a/py/hexagram/trans.py b/py/hexagram/trans.py
new file mode 100644
index 0000000..bccb89b
--- /dev/null
+++ b/py/hexagram/trans.py
@@ -0,0 +1,39 @@
+import enum
+
+class Gear(enum.Enum):
+    R       = -1
+    N       =  0
+    GEAR_1  =  1
+    GEAR_2  =  2
+    GEAR_3  =  3
+    GEAR_4  =  4
+    GEAR_5  =  5
+    GEAR_6  =  6
+    GEAR_7  =  7
+    GEAR_8  =  8
+    GEAR_9  =  9
+    GEAR_10 = 10
+
+    __strings__ = {
+        -1: 'R', 0: 'N', 1:   '1',
+         2: '2', 3: '3', 4:   '4',
+         5: '5', 6: '6', 7:   '7',
+         8: '8', 9: '9', 10: '10'
+    }
+
+    def __str__(self):
+        return self.__strings__.get(self.value, '?')
+
+class ShiftMode(enum.Enum):
+    NORMAL  = 0
+    COMFORT = 1
+    ECO     = 2
+    SPORT   = 3
+    RACE    = 4
+
+    __strings__ = {
+        0: 'Normal', 1: 'Comfort', 2: 'Eco', 3: 'Sport', 4: 'Race'
+    }
+
+    def __str__(self):
+        return self.__strings__.get(self.value, '?')