✔ 最佳答案
Ironhide dies for the same reason Jazz died in the first one.
Ironhide was based off the GMC Topkick truck which has been discontinued by GM.
Jazz was based off the Pontiac Solstice which was also a discontinued model.
the only GM vehicles that remain in the movies are those that are based on current production models or concept vehicles.
any other vehicle that has been discontinued by GM will be discontinued in the Transformer Movie Franchises. There was even a statement to this effect by GM after the release of Transformers I.