model with an unknown motor was also used to shoot the additional scenes for theatrical release. Spielberg did not care what kind of car was used in the film, as long as it was red, which would allow the vehicle to stand out from the landscape in the wide shots of the desert highway. In what he called an "audition", Spielberg viewed a number of trucks. He selected the 1955 Peterbilt 281 over the contemporary, flat-nosed, "cab-over" style of trucks. The long hood of the older Peterbilt, its split windshield, and its round headlights give it more of a "face", adding to its menacing personality. Additionally, Spielberg said that the multiple license plates on the front bumper of the Peterbilt subtly suggest that the truck driver is a serial killer, having "run down other drivers in other states". For each shot, several people were tasked to make the truck successively uglier, adding oil, grease, fake dead insects and other blemishes. The truck had had been manufactured as a single axle, and a tag-along axle had been added. It had a 1673B CAT turbocharged engine with a 13-speed transmission, making it capable of hauling loads over 30 tons ( t) and reaching top speeds of . Even though a single truck was used for the original filming, so the shots of it falling off the cliff and being destroyed had to be completed in one take. A back up truck that is a 1960 Peterbilt 281 that was never used in any scnenes of the film was also built up for the original film. At the time the original film was being filmed the Cat Engine in the 1955 Peterbilt 281 began giving the film production engine problems not knowing if the 1955 Peterbilt 281 would make it to the end of filming, So, That's where the 1960 Peterbilt 281 being an exact copy of the 1955 Peterbilt 281 was built up. The only differences between the 1955 Peterbilt 281 and the 1960 Peterbilt 281 that the 1960 Peterbilt had featured a Cummins Engine while the 1955 Peterbilt had featured a 1673B Cat Engine and the air cleaners the Cat had a yellow square air cleaner while the Cummins had a dark brown round one. Another third truck that was a 1962 Peterbilt 351 that is said to be long gone today was purchased to shoot the additional scenes for theatrical