12-19-2011, 09:34 PM
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An 89 should have the ADD system, which means no hubs, auto or manual.
randol154, when you shift into 4 LO do you feel the lower gearing? does the 4WD indicator on the dash light up?
If yes and no, the t-case is doing it's job and the problem is most likely in the somewhere in the vacuum circuit that locks the front axle, as TNRabbit suggested.
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84 4Runner rockcrawler - ARBed 5.29's, 36" TSLs, dual t-cases w/ 4.7 crawler gear, Chevys, 30 spline Marlins
83 p/u trail rig - Buick 231 V6, Weiand intake, Holley 4 bbl, TH-350 auto w/700R4 low gearset, dual tanks ...
89 4Runner - stock