Year	Number	Notes	More notes
1956e	5047799	early
1956	5047924		Front cover has no plastic actuator switch; it has a flat metal slide. Access to the back side upper left cover attaching screw is thru a hole in the mounting arm.
1957e	5047984	s/n 1400	984 was fast park. 991 is a slow park design.
1957	5047991	slow part des. Dec 1957and later	Dec. of 1957 and later cars only
1958	5044266		came with a new internal style switch design.. Better
1959	5044266		came with a new internal style switch design.. Better
1960	5044266		came with a new internal style switch design.. Better
1961	5044266		came with a new internal style switch design.. Better
1962e	5044266	s/n 2000	came with a new internal style switch design.. Better
1962	5044479		changes to this motor were: a plastic coated internal wiring and phillips screws on the actuator stand.
1963	5044518
1964	5044518
1965	5044602
1966	5044602
1967	5044602
1968	5044683
1969	5044731	foil decal	foil decal 5044731	4939300 on case by Delco
1970	5044758		foil decal 5044758
1971	5044758		foil decal 5044780
1972	5044780		foil decal 5044780
1973	5044784		foil decal 5044784
1974	5044811		foil decal 5044811
1975	5044814		foil decal 5044814 Pr say's 811 not sure	4960974 is over counter repl
1976	5044814		foil decal 5044814	4960974 is over counter repl
1977	5044814		foil decal 5044814	4960974 is over counter repl
1978	5044814	standard	foil decal 5044814	4960974 is over counter repl
1978	5044907	(pulse)	foil decal 5044907
1979	5044814	standard	foil decal 5044814	4960974 is over counter repl
1979	5044907	(pulse)	foil decal 5044907
1980	5044907	(pulse)	foil decal 5044907
1981	5044907	(pulse)	foil decal 5044907
1982	5044907	(pulse)	foil decal 5044907