Yukon Trac Loc Positraction, Ford 8.8" IRS, 34 Spline, '15 & up Mustang. (Part number YC F348) Yukon Gear & Axle manufactures a full line of standard open and positraction limited slip carrier cases for a variety of applications. Each unit is cast and machined to exacting specifications to produce a carrier that provides both high strength and tight tolerances for a long and reliable service life.. Yukon Gear & Axle manufactures a full line of standard open and positraction limited slip carrier cases for a variety of applications. Each unit is cast and machined to exacting specifications to produce a carrier that provides both high strength and tight tolerances for a long and reliable service life. . Yukon Gear Trac Loc Positraction / Ford 8.8in / 34 Spline / 2015+ Mustang. Yukon Trac Loc Positraction, Ford 8.8" IRS, 34 spline, '15 & up Mustang. Yukon Trac Loc Positraction; Ford 8.8in. IRS; 34 spline; 15/up Mustang. Yukon Trac Loc Positraction for 2015+ Ford Mustang 8.8", 34 Spline . Yukon Trac Loc Positraction for 2015+Ford Mustang 8.8in.; 34 Spline. Fits 3.31 & up gear ratios. (Not 3.15 ratio). Fits 3.31/up gear ratios. (Not 3.15 ratio). Limited Slip Differential Assembly. 2015 & up Ford Mustang. 2015 Up Ford Mustang. Differential Case . 34 spline. 19-15 FRD. YC F348 . Trac Loc

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