This doesnt sound like a hub issue. The later gen Montys the hubs are always locked, if you diff is winding out in 1st and 2nd then you tranfercase is engaged.
Russ


GETTIN OLD THATS EARNED
Happy trails to you
(1)98 Montero SR RB Rock Crawlers BFG 33s Rancho 9000's OME Med coils rear
(2)95 4Runner All Pro Nerf bars BFG 32s
ARB bull bar
Downey 2" rear coils Downey headers
(3) 90 Montero LWB 3.0 auto
(4) 98 Kawi GPZ1100