Product Code : SA440. Jeep Wrangler YJ 1987-1995: Performance Modifications. InJeep Wrangler YJ 1987-1995: Performance Modifications, veteran author Don Alexander covers the 4.0 engine, transmissions (automatic and manual), transfer cases, axles, differentials, and driveshafts, steering boxes, brake upgrades, shocks, springs and lift kits, chassis strengthening, and interior upgrades.
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