One preferred embodiment of the invention is a shaft to transfer torque in a vehicle including a first member having internal splines and a second member having external splines engagable with the internal splines to allow telescopic movement between the first member and the second member and to transfer torque between the first member and the second member. The external spline has a coating to reduce friction during the telescopic movement. Another preferred embodiment of the invention is a suspension system for a vehicle including a biasing device and the above-described shaft.