It's got a NAPA reman unit on it now, and has been working well for a few days. So I suppose the RockAuto unit had a fracture in the shaft or something. The NAPA unit also included new O rings and a nut and bolt to pull the pulley onto the shaft, rather than using a pulley tool. I like the nut and bolt better.

What type filter am I looking for, something like a riding tractor spin on oil filter to plumb into the return line?

Scott B. "I'm a self-made man... I started with nothing, and I still have most of it!" 68 360 rusty B'cuda 'vert (GO Fish)13.59@ 98.72 mph 69 340 GTS stock 14.18@ 95.60 mph 01 5.9L Ram 1500 Quad Cab 4x4 01 3.5L 300M 16.23@ 86.97 mph