OK no real info here. Support the trans block the wheels. Remove rear and front driveshafts. Drop the skid plate. Disconnect speedo, remove t-case linkage and remove t-case mount nuts. Remove t-case. Now you can see the seal
I would do all the seals at once if they are old and save the labor.
89 2.5 TBI, 4" RC lift, 1" Booms, SYE, Adams Driveshafts front and rear, Ford 8.8 with 4:88s, BFG 33X12.50X15, and a ton of other stuff.
AF Jeep Club Tail Number 184