Drive assembly including raw hub extension

A method of manufacturing drive assemblies for vehicle drive trains comprising:

• manufacturing a plurality of raw hub extensions of a same size and shape;
• machining a first subset of the raw hub extensions in a first manner to create first hub extensions for non-rotatably connecting to first crankshafts of a first size and a first shape;
• machining a second subset of the raw hub extensions in a second manner, which is different from the first manner, to create second hub extensions for non-rotatably connecting to second crankshafts of a second size and a second shape, with at least one of the first size and the first shape being different from the second size and the second shape;
• connecting each the first hub extensions to one of a plurality of first base assemblies, each of the first base assemblies including a first base hub configured for non-rotatably connecting to an outer circumferential surface of a first transmission input shaft, each of the first base assemblies including a first torsional damper fixed to the first base hub, the first torsional damper including a first input section and a first output section drivingly connected by first springs, the first springs allowing relative rotation between the first input section and the first output section, the first output section of the first torsional damper being non-rotatably fixed to the first base hub;
• and
• connecting each the second hub extensions to one of a plurality of second base assemblies, each of the second base assemblies including a second base hub configured for non-rotatably connecting to an outer circumferential surface of a second transmission input shaft, each of the second base assemblies including a second torsional damper fixed to the second base hub, the second torsional damper including a second input section and a second output section drivingly connected by second springs, the second springs allowing relative rotation between the second input section and the second output section, the second output section of the second torsional damper being non-rotatably fixed to the second base hub.