When the four speed was introduced in 1974, the transfer case ratio was raised and new helical cut gears were used that were wider and quieter than the earlier model. Until 1981, parking brake was mounted on the driveline after the transfer cases. In 1981, the new split-case transfer case was introduced. It featured a stronger idler shaft and the parking brake was moved to become part of the rear drum brakes. Transmission & Transfer Case Ratios (All :1)
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