Truck shop: Only thing I can figure is cat likes to either switch suppliers on a known good product or reinvent the wheel as if it wasn’t already round enough. For instance, the new next gen excavators are having issues with the swing case bolts coming loose. They’ve only been putting swing drives in excavators for the last 50 years, you’d think they would be past that problem by now. I think a PSSR once told me that a CAT machine is something like 95% parts supplied by suppliers whereas CAT used to be closer to 80% sourced in house. Once again a problem with having a “global economy” IMO.