magnetic plug will also trap those small metal particles and keep them from being passed through the gearset. They’ve also engineered an easy-see sight glass on the side so you can monitor fluid level and condition without having to drain the diff or remove the cover.
One negative aspect to all the extra torque we’ve added since the truck was stock (with plenty more to come in the next couple installments) is the strain it creates on the drivetrain. Extra torque puts more load on the driveline and rear axle, and under heavy acceleration it will cause the rear axle to “wrap,” or rotate, under the load, throwing off the U-joints and pinion angles and potentially leading to premature failure. It also can change the rear suspension geometry enough that the tires will lose traction at the ground, creating a shudder and wheel-hop situation when towing, racing or sled pulling.
To overcome these issues, the Duramax specialists at HSP Diesel developed a true bolt-in, budget-friendly traction bar kit that will resolve the above noted issues, while looking great underneath the truck thanks to many powdercoating options. Tractions bars are exactly what the name implies: an additional bar added under the vehicle to help locate the axle and prevent it from wrapping under load, planting the tires and eliminating wheel hop and drivetrain shudder.
Next comes the toughest part of the job: drilling the four mounting bracket holes in the factory frame rails. By mounting the traction bar to the lower bracket already on the truck, the frame bracket can be loosely aligned to the Heim joint and held in its correct location on the frame so the holes can be marked.
You’ll need to make sure that the axle U-bolts and the lower axle bracket line up square with the axle. Tightening each bolt a little at a time will help keep everything in line. That new Kingsport Grey powdercoat is going to look great underneath this truck.
To ensure years of trouble-free service, the traction bar kit includes a fully serviceable, top-of-theline Heim joint to connect the bars at the frame. These Heims will allow you to fine-tune overall bar length and can be easily rebuilt should they ever need to be.
With the mounting holes drilled and the upper brackets installed at the frame, the traction bars can be assembled and bolted into place using the supplied Grade 8 hardware. Be sure to grease the upper Heim joint so it can move freely as needed.