Visteon will deliver its all-new 'Slip-In-Tube Propshaft' in the 2003 extended versions of GMC Savana and Chevrolet Express vans built by General Motors.

The Slip-In-Tube Propshaft is described by Visteon as 'first-of-its-kind technology with the potential to shape the future of propshaft design'. The company says that it can help reduce weight, vehicle noise, and increase vehicle safety.

The manufacturing of the new design uses a Computer Numerically Controlled (CNC) cold rolling spline process. This technique means that no material -- neither the inner nor the outer tube -- is machined away. The process allows the tubes to slide in and out of each other easily even under heavy torque. Visteon says that in durability tests the Slip-in-Tube Propshaft lasted more than four times longer than traditional propshafts.

It is also claimed that the propshaft enhances crash energy management by telescoping a distance of up to eight inches at a controlled axial load, allowing the energy to be absorbed in the event of sudden impact.

``Visteon's patented and patent-pending Slip-In-Tube Propshaft is in many ways superior to the conventional concept. This particular design helps simplify the manufacturing process and eliminates the unpredictable Noise, Vibration and Harshness (NVH) sometimes associated with typical machined splined components. In addition, the aluminum version reduces weight by as much as 30 percent over conventional propshaft designs. The result is a smoother, quieter ride for vehicle occupants,'' said Mitch Glowacki, Visteon product design engineer - driveline systems.