It's not quite like changing brake pads. Because to do it properly, the B3 clutch pack clearance should be set to 1.5 - 2.0 mm. And if he's in that far, the K2 drum is right there. If the B3 clutches are all worn down, the K2 might be too. And that's real easy to check, spec is 0.7 -1.3 mm.

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'82 300SD - 361K mi - "Blue"

"Good judgement comes from experience. Experience comes from bad judgement."

listen, look, .........and duck.