tropoid joint Design of a tropoid joint with tropoid star with pinions and idlers. Tropoid joints permit diffraction angles of up to 20 degrees and 30 mm axial displacement. This can be demonstrated very clearly on the model. description ordernumber 1263 see also: Wet duplex clutch Rear axle differential (electronic traction system) A-class AMG transmission technique: 5-gear transmission Assembly of complete main shaft