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The Dana/Spicer Model 80 is an automotive axle manufactured by Dana Corp. and has been used in OEM heavy duty applications by Chevrolet, Dodge, and Ford. It can be identified by its straight axle tubes, 10 bolt asymmetrical cover, and a "80" cast into the housing. Dana 80's are made as full floating, rear axles only and are step up in overall strength compared to the Dana 70. 1988 Ford was the first company to use the Dana 80. The Dana 80 has a GAWR up to 11,000 lbs, however it is common practice among manufacturers to derate Dana 80's. Gross axle weight ratings are lowered by the vehicle manufacturer for safety and tire reasons. The OEM Limited slip differential originally was a "Power Lok" until 1998 when the "Trac Lok" phased it out. Trac Loks are currently a $350.00 USD option with Ford Super Duty trucks.〔http://bp3.ford.com/2011-Ford-F-350/Models?useCookieZip=true#/Models/〕 The Dana 80 Trac Lok is unique being it is a 4 pinion unit, unlike other Dana Trac Lok units with 2 pinions. This was the only rear axle available for the 2nd generation Dodge Ram 3500 trucks. == General Specifications == * Ring gear measures 11.25". * 4" diameter axle tube. * Inner axle shaft spline counts are 35 and 37. * Pinion shaft diameter: 2.0" * Pinion shaft splines: 37 * Axle Shaft diameter * * 35 Spline: 1.50" * * 37 Spline: 1.58" * Gear ratios: 3.23, 3.31, 3.54, 3.73, 4.10, 4.11, 4.30, 4.63, 4.88, 5.13, & 5.38 * Brakes measure 13.39" for 2011 F-350 DRW trucks. * Brakes measure 15.35" for 2011 F-450 trucks (13,050 GVW). 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Dana 80」の詳細全文を読む スポンサード リンク
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