9 Inch Ford Trac-Loc With 28 Spline Limited Slip Aggressive - 4 Preload Springs 9 Inch 28 Spline HD T/L Race (Will Chatter & Needs T/L Bolts) Yukon Gear & Axle Apparel / Accessories - Apparel & Lifestyle - Key Holder If you are using the

If you are using the magnetic pickup input (green and violet wires) to trigger your MSD Ignition

Bolt-On Installation: Featuring a 100 percent bolt-on design that requires no cutting

Steel clutches

Just above the maintenance-free magnetic pickup there is a chromoly mechanical advance assembly that provides smooth advance of the timing and is easy to adjust

9 Inch Ford Trac-Loc With 28 Spline Limited Slip Aggressive - 4 Preload Springs 9 Inch 28 Spline HD T/L Race (Will Chatter & Needs T/L Bolts) Yukon Gear & Axle Apparel / Accessories - Apparel & Lifestyle - Key Holder If you are using the9 inch Ford Yukon Trac Loc with 28 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