An improved bushing assembly comprising an inner bushing having an outwardly-facing frusto-conical surface, an outwardly-facing threaded surface, and an inwardly-facing cylindrical surface adapted to engage a shaft, an outer bushing having first and second bushing bearing surfaces and an inwardly-facing frusto-conical surface in sliding engagement with the outwardly-facing frusto-conical surface of the inner bushing, a nut having an inwardly-facing threaded surface in mating engagement with the outwardly-facing threaded surface of the inner bushing and first and second nut bearing surfaces radially overlapping the first and second bushing bearing surfaces of the outer bushing, whereby rotation of the nut in first and second rotational directions relative to the inner bushing moves the outer bushing in first and second axially directions to operatively tighten or untighten, respectively, the inner bushing around the shaft.

A driveshaft assembly for use in a vehicle. The driveshaft assembly has a tubular shaft having a first receiving end portion with a hollow interior and a driveshaft end having an insert end portion with a main insert portion, a spacer mounting seat and a spacer catch surface extending therebetween. The main insert portion has a diameter greater than a diameter of the spacer mounting seat. A spacer a first end portion with a first opening, a center portion with a wall portion, and a second end portion with a lip portion having a second opening and a transition portion. The second opening has an inner diameter that is less than an inner diameter of said first opening. A terminal surface defining the second opening is disposed radially outboard from the spacer mounting seat and a portion of the lip portion extends substantially perpendicular to the wall portion.