1970-1998 GM 8.5" 10 Bolt Chevy - Truetrac Style Limited Slip Posi Package w/ Gears & Install Kit

GM 8.5" 10 Bolt Gear & Hell Posi Package   Description Package Includes: (1) Rigid Axle "HELL" Positraction Carrier(1) Ring and Pinion Gear Set (Choose Ratio Above)(1) Differential Master Install Kit - *NOTE* - The "HELL" positraction unit is currently only available for 30 spline axle applications. If you have 28 spline axles, please see our Eaton Clutch style listing (available in both 28 and 30 spline carriers). Our clutch style, 28 spline carrier is part number: POSI-GM8.5-RA. - Our Rigid Axle, Detroit Truetrac style, "HELL" limited-slip positraction unit uses 3x2 spiral gears for progressive and variable traction. This unit acts like a standard open carrier under normal driving conditions making it unobtrusive. Once a tire looses traction, or the terrain changes, the helical cut gears mesh together transferring torque to the high traction tire. Once traction on both sides resumes, the carrier goes back to normal operation. The carrier case is forged steel for stre