E150GT, I found adjustable wrenches unsuitable for loosening the large nut on the driveshaft due to insufficient clearance. Purchased 41mm and 46mm open-end wrenches and the nut loosened with some effort ... it was extremely tight. Verify the sizes you need before buying any new wrenches. Also, be sure to torque the flex disc bolts to spec.

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Fred Hoelzle