1 ton dana rear problem ?

[wahl4m]

my 83 chevy -1 ton truck had a left wheel seal leaking ,checked 90 wt oil ?seemed to have some water in it ?? pulled both drums ! had some lite pitting on wheel bearings !!! im just worried about carrier bearings ?might be same way ? anybody had same problem ? should i have it torn down and checked ?to avoud trouble down the road ? pinion seal semms ok-no gear noise! ring and pinion look ok ! thanks for any info ??