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im pretty sure all 3.0 auto runners came with 4.56 gears.

off-road.com has a gear code ID page, iirc


Nope, many had 4.10s. I got an unfortunate surprise about this last summer.


and some have 4.88's, that's how i got my diffs. but im unsure if they had them before 1990.

87 22R PU, 2? body lift, 33? BFG muds, 4.88's, F&R Lock-Rights, Rancho Shocks, EB's Street RV Head w/ 268 Cam, LCE Header, 2" to 2 1/4" exhaust, Flowmaster 50 series, Magnaflow high flow cat, complete Herculined SR5 interior, V6 BB, MC, and calipers.