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1961 electric thunderbird wiper motor3/13/2024 ![]() ![]() 1957-'58 Buick Special and Century and Super without Cam-O-Matic.1957 Buick Special and Century, Roadmaster and Super with Cam-O-Matic.1956 Buick Special and Century with Cam-O-Matic.1956 Buick Special and Century, except Cam-O-Matic. ![]() These cars can be distinguished by the additional Cam-O-Matic dogleg that was part of the wiper arms. These systems were invented by Trico Products and used on many Buicks and Cadillacs for several years during the 1950s. The Cam-O-Matic wiper system used cables that attached to the wiper arms to better hold the blades to a curved windshield. GM vehicles used vacuum-operated wiper motors until 1957 however, the unreliability of the vacuum supply from the fuel pump, especially at idle, caused the wiper blades to creep across the windshield at a time when they were needed the most.Įlectric wiper motors were first used in 1955 Corvette V-8 and full-size Pontiac models, and factory-option retrofit kits were available to convert from vacuum to electric on 1955-'57 Chevrolets that were based on these early electric motors and included new arms and wiper blades to complete the changeover kit.Įlectric motors had replaced the vacuum units entirely for GM cars by 1958 and trucks by 1959.
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