unfortunately they are definitly non-serviceable... the way they are assembled keeps them from being able to be opened at all. maybe check e-bay to see if theres a cheap one floating around, and worst case senario is if it's bad enough go by a junk yard and pull one from a truck yourself and hopefully they wont charge you hardly anything as they cant garauntee the condition of the part. if its even half decent then it will at least last you until you can get a new unit, and the one you get may still be perfect and have plenty of life.
'94 2.3L, M5OD, BW1354 manual, 4x4, 31x10.5 BFG A/Ts, 15x8 AR Chamber teflon rims, 7.5 4.10 lock-right w/disks, D44 SAS 4.10 aussie-locker, duff traction bars, electric fans, spintech muffler, duff poly body mount bushings, Lightforce RMDL140's, cobra 18wxst II, herculined floor, 375,XXX
'87 camaro 305 carbed (needs engine)
'92 subaru legacy 2.2L Turbo (needs tranny)
TRS Tech Support Staff