Detroit Locker Differential - 35 Spline - 4.56 Ratio and Up - 9.75 in - Dana 60 4704021-20 Features integrated oil fill neck

Features integrated oil fill neck with included billet aluminum oil fill cap (Holley P/N 241-225)

Bleeder and drain included

There's even room enough to accommodate a dual feed fuel line

GM 1996-2004

Angled spark plugs for superior combustion

Detroit Locker Differential - 35 Spline - 4.56 Ratio and Up - 9.75 in - Dana 60 4704021-20 Features integrated oil fill neckDetroit Locker Differential 225SL29A 35 Spline 1. 50 in. Axle Shaft Diameter 4. 56 and Up Ring Gear Pinion Ratio Dana 60HD Most Durable Dependable Maximizes Traction Engineered To Keep Both Wheels In Drive Mode Choice Of Professionals Off Road Enthusiasts The legendary Detroit Locker began the revolution in performance differentials and still leads the industry today as an Eaton brand. The Detroit Locker is the most durable and dependable locking