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Old 02-23-2008, 10:48 PM
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Re: 89 4runner 4wd not engaging, 4wd light is on

Stock Toyotas, like most cars and trucks, have open rear diffs. That means the power goes to one wheel, the wheel with the least traction. It makes for smooth turns.

Putting the t-case in 4WD sends power to the front axle in addition to the rear. The front axle is also open from the factory.

Exception would be some TRD models that have a factory e-locker. The locker locks the diff so power is sent to both wheels equally.
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84 4Runner - ARBed 5.29s F&R, 4.7 & 2.28 t-cases, Chevys, AP x-over, BudBuilt x-member, 2" drv trn lift, 36" TSLs, 30 spline Longs

80 something p/u - Buick 231 V6/TH-350 trans, Holley 4 bbl, Weiand intake, dual batts, dual tanks ...

89 4Runner - stock

2000 Isuzu Trooper + 2010 Sonata
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