I was hoping someone here might be able to tell me if the 3B motor mounts are easy to swap out on a BJ75 pickup, or for that matter, if they need replacing at all. My truck has 225000km and I suspect they might be worn because shutting off the engine is very abrupt and causes the truck the shake quite noticeably for a second or so. I only have experience with the 6 cylinder diesels, is this a 3B "trait"? It starts and idles OK, no unusual vibrations when driving.