Ford Pinto
Offered with an inline-4 engine and bucket seats the Pinto's mechanical design was conventional, with unibody construction, a longitudinally mounted engine in front driving the rear wheels through either a manual or automatic transmission and live axle rear end. Suspension was by unequal-length control arms with front coil springs; the live rear axle was suspended on leaf springs. The rack and pinion steering had optional power assist, as did the brakes.
Ford Pinto
The National Highway Traffic Safety Administration (NHTSA) ultimately directed Ford to recall the Pinto. Initially, the NHTSA did not feel there was sufficient evidence to demand a recall due to incidents of fire. The NHTSA investigation found that 27 deaths were found to have occurred between 1970 and mid-1977 in rear-impact crashes that resulted in fire. The NHTSA did not indicate if these impacts would have been survivable absent fire or if the impacts were more severe than even a state of the art (for 1977) fuel system could have withstood. In their analysis of the social factors affecting the NHTSA's actions, Lee and Ermann note that 27 is the same number of deaths attributed to a Pinto transmission problem which contributed to collisions after the affected cars stalled. They also note that the NHTSA had two primary incentives in proving a defect existed in the Pinto's fuel system design. The administration was pressured by safety advocates (Center for Auto Safety) as well as the public response. It was also being forced into action due to the ways in which both the courts and executive branch were limiting the ability of the NHTSA to address systematic auto safety issues.