There is not a little irony in the sizing of the driveline and final drive of the 380SE vs. the 300SD; the 300SD engine produces more torque than the US-spec 380, yet the 380 chassis was fitted with the larger driveline and final drive!

Inasmuch as the individual pieces of all drivelines are balanced separately, and then checked as an assembly, the interchange of pieces between assemblies will, at most, result in a very small imbalance condition.