ABSTRACT
The disadvantages of unitized body construction are that (1) more road noise and vibration are transmitted, (2) a serious safety problem is posed if rust attacks the attachment points for the engine, transmission, or suspension, (3) repair costs for body damage are usually higher because a large expanse of the body may have to be cut away and replaced in order to maintain structural integrity, and (4) manufacturing costs are higher due to the need for more sophisticated metal stamping and welding equipment. However, a unitized body using subframes supporting a powertrain or platform chassis, plus modern rustproofing, can overcome some of these disadvantages.
