Many of these are at best double hearsay, but one thing for sure
。安排送邓小平到承德的日制小旅行车，后被调配到国防部专用时，经检查，发现前轮轴已断裂，在公路行驶时，随时都会翻车燃烧。
Is a load of crap. A couple of years ago, my wife's SUV started shaking while drive on highway. For about I month, I thought it was wheel alignment, and took it in to balance them. It helped a little bit, but pretty soon, it got worst. I took it to the dealer again for check up, and they found out the shaft had cracks. If this were true, there was no way the crack could escape attention. To assassin someone by compromising car shaft would be utterly ineffective. Cracking shaft is pretty common, but seldom causes deadly accident.