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Toyota 4runner Stock Front Axlehousing

The closed knuckle design of the Toyota front axle is shown on this stock front axlehousing. The inner and outer axleshafts are joined by a Birfield joint within the knuckle. The closed knuckle seals the Birfield from water and dirt.
1979-1995 Toyota 4x4 Builder's Guide - How To Trail Your Toyota

The closed knuckle design of the Toyota front axle is shown on this stock front axlehousing. The inner and outer axleshafts are joined by a Birfield joint within the knuckle. The closed knuckle seals the Birfield from water and dirt.  View Related Article