Review on 🔧 Efficient and Reliable: ACDelco 38001 Professional Idler Pulley for Increased Performance by Deejay Allard

There are many reviews here except the bearing presses unevenly into the pulley so I was concerned. Mine arrived in a sealed box with an ACDelco tag and the pulley is stamped 'Made in Canada'. I also have a bearing that seems to stick out further on one side. However, instead of sending it back, I put it on the stud and screwed it on. Despite the obviously bad fit of the bearing, the wheel rotates optically correct. In fact, there is more play when installing the bushing on the truck. As a result, I installed it and there is no visual wobble on startup. My guess is that the hub manufacturing tolerance is sloppy so the back of the bearing is uneven all the way around. The most important tolerance is that the bearing is pressed perpendicular to the face of the drive to rotate properly. I recommend mounting the wheel and trying it out before you get too upset about what ends up being just an uneven hub flange on the rear wheel.