If so, then why not just pull the front output section off of the T-case? Then, disassembling it and inspecting these sprag clutches is no big deal at all.
(all covered in TM 9-2520-246-34, Section VIII, Fig. 4-46 or TM 9-2520-246-34-1, Table 2-39)
So far, all of the (known) low-mileage...