What David is reffering to still requires removing the transmission. From there, the pump housing can be removed to rebuild only the problematic drum in an hour or so. Rebuilding the drum on the other side of the planetary assembly requires taking the tail shaft, aux pump and govenor apart to gain access. A Lot more parts to deal with and time consuming. This is basically half a rebuild. I may do this since the rest of the trans still shifts hard.

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Current Stable:
01 ML55 AMG
92 500E (a few mods)
87 300E (lots of mods)
00 Chevy 3500HD Diesel Box Truck
68 18' Donzi Marine
06 GT i-Drive7 1.0 Mountain Bike (with GPS!)

PREVIOUSLY OWNED:83 300SD, 87 420SEL, 88 420SEL, 90 420SEL, 86 560SEL, 86 190E 2.3-16V AMG, 94 E320