Your diff will have 3.55's or 3.73's depending on having tow package or not. The same goes for the '96 4.0. You will need to verify the gear ratios match before swapping.
Edit: That tag picture is hard to read, but if it is 53007557, then it should have come from the factory with 3.55s and no Trac-Lok. The "55" on the second row also indicates 3.55 gears. (11 = 4.11, 55 = 3.55, 73 = 3.73) If I were you, I'd be checking to see what's stamped on the ring gears to make sure.
1994 5.9L ZJ, retrofitted UC package, NP242 swap, 17" JK Moabs with 32" BFG MT KM's.
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