.6's will take a dump on occasion. Most drivers I've ridden with that exerienced early failure were not stopping the car with the brakes when backing out of a parking space. Big no-no with a .6. Stop the car fully, then change directions. Service them every 60k with the MB fluid and there is no reason it shouldn't last.
Project Smoker, '87 603 powered wagon
Hauler, 96 CTD can you say torque?
Toy 73 Cougar xr7 convertible
Acme Automotive Inc.