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Pontiac still offered the regular 455 (RPO L75) in its full sized cars, and after a negative public reaction for dropping the 455 engine, it was re-introduced mid-year as an available option for the 1975 Pontiac Trans Am. However, the engine used in these Trans Ams was the same regular production 455 taken from the big body cars Pontiac was ...
The Pontiac Grand Ville is a full-size car that was a sub-series trim package for the Pontiac Bonneville from 1971 to 1975, which had served as Pontiac's top-trim model since 1958 while remaining below the top level Pontiac Grand Prix. [2] The Bonneville name remained but was now downgraded, and in effect replaced the Pontiac Executive. The ...
A 400 cubic-inch V8 was the standard engine on the Grand Safari for 1973 and 1975. A 455 cubic-inch V8 was offered as an option those two years and was standard for the other four years of this generation.
A SD-455 equipped engineering prototype Grand Am was built and tested, [4] but was later dismantled and destroyed. 1973 engines may have point or unitized ignition. 1974 engines may have point or unitized ignition or starting around May 1, 1974, HEI ignition. 1975 engines have HEI ignition. 1975 was the first year for the catalytic converter.
Engine options remained mostly unchanged, however, the L75 455 engine was dropped, but the LS5 455 HO remained as an option for the Formula and standard for the Trans Am. [27] Pontiac advertised the 1972 455 HO as de-tuned to 300 hp, but the engine was unchanged from 1971.
The 455 V8 was discontinued for all LeMans models for 1975, but was still available in the Grand Am. Transmission offerings included a three-speed manual standard with the six-cylinder and 350 two-barrel V8, with the three-speed Turbo Hydra-matic optional with those engines, a "mandatory" option with all other engines in sedans and coupes, and ...
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