When you combine big power, big tires and a limited slip differential with leaf springs you have a recipe for the enemy of traction and your driveline parts, wheel hop. Wheel hop is when the torque of the engine working against the traction of the tires, twists the rear axle assembly in a clockwise direction, bending the leaf springs. When the tires break traction, the axle can snap back, catch traction, twist, and break traction again, over and over in a cycle that builds up to where the tires are hopping off the ground. This causes a loss of traction which hurts on pavement and off road driving. Wheel hop is very hard on parts and can lead to failure of the differential, ring and pinion, axles, transmission and drive shaft. The problem is bad on supercharged Tundras like ours which are known to break the rear U Joint on the driveshaft even though the rest of the rear end is pretty sturdy. Fortunately SDHQ Motorsports has come up with a solution for this issue.
Toyota has staggered the rear shocks to help reduce wheel hop from the factory and our stiffer heavy duty Icon rear springs coupled with the increased damping from the Icon shocks have eliminated about 70% of our obvious wheel hop. However, when we did a drag launch you could feel a nibbling vibration and the burnout marks would be striped, showing where the tires were hopping while spinning. The wheel hop was worse off road in the dirt and it was awful when turning right on the street from a dead stop and trying to give it gas to get out in traffic quickly, the wheels would hop badly and the traction control would come on hard, causing the truck to bog in traffic instead of accelerate like you needed it to! We hoped the SDHQ bars would help us with these issues.
The SDHQ bars are made out of thick walled, tig welded 4130 chrome moly and are super strong, strong enough to withstand impacts from rocks and other offroad hazards. They are designed to fit most popular aftermarket springs as well as the stock springs.
The SDHQ traction bars come with high quality hardware and spherical bearings with this cool glove like dust boot for the spherical bearings.
The SDHQ axle brackets are strong and tough. These replace the stock brackets underneath the axle and provide mounts for the traction bars.
The revolutionary feature of the SDHQ traction bars that sets them apart from any other bar is this swinging forward mount. Normally we do not recommend traction bars for anything other than drag racing and especially not for anything that has to handle in turns or go off road. This is because old school traction bars do not allow the rear axle to twist without binding. The binding means that in cornering, the rear roll stiffness is ramped up quickly as the axle binds. This causes sudden oversteer and a loss of traction as the inside rear wheel will get lifted off the ground. In off road, the rear axle cannot articulate causing a huge loss of traction on uneven surfaces. This pivoting link allows the traction bar to work while allowing for full twist and articulation! We will show you how this works in a bit.