8 Inch Ford Trac-Loc With 31 Spline Limited Slip Aggressive - 4 Preload Springs 8 Inch 31 Spline HD T/L Race (Will Chatter & Needs T/L Bolts + Yk F8-Ag) Yukon Gear & Axle Electrical & Ignitions - Distributor Caps & Rotors Tuff Country P/N 97021 block

Tuff Country P/N 97021 block kit includes lift blocks and u-bolts designed to raise the rear of your GM Truck

Tire Clearance up to 35 Inches: Run larger tires for an aggressive look and improved off-road capability

prior to use

Tuff Country traction bars help to reduce axle hop or axle wrap

5 inch suspension lift kit

8 Inch Ford Trac-Loc With 31 Spline Limited Slip Aggressive - 4 Preload Springs 8 Inch 31 Spline HD T/L Race (Will Chatter & Needs T/L Bolts + Yk F8-Ag) Yukon Gear & Axle Electrical & Ignitions - Distributor Caps & Rotors Tuff Country P/N 97021 block8 inch Ford Yukon Trac Loc with 31 Spline. Limited Slip Aggressive Design 4 Preload Springs 4 Pinion Design Yukon Dura Grip is a positraction limited slip differential that provides smooth yet aggressive traction, giving you the confidence and performance you need across a wide variety of terrains. The Dura Grip is engineered for long life and is completely rebuildable. Dura Grips are constructed with a high strength nodular case, forged 4320 chromoly