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The Roto was adopted for all Oldsmobiles as well as Pontiac's full-sized Catalina, Ventura, and Grand Prix models, while all Cadillacs and Pontiac's Bonneville and Star Chief models retained the older four-speed Controlled-Coupling Hydra-Matic unit. Controlled Coupling HydraMatic and Roto HydraMatic both have the "Split Torque feature" whereby ...
For example, 80 is stronger than 60, which is stronger than 40, etc. A 4L80-E can handle more torque than a 4L60-E. The "E" denotes electronically controlled shifting. The 4L60 however is hydraulically shifted based on governor pressure and throttle valve (TV) cable position. 1992 was the last year of widespread usage of the 700R4 (4L60).
1940–1967 Hydramatic — 4-speed Pontiac/Oldsmobile/Cadillac (totally different design than the later Turbo-Hydramatics) 1947–1952 Dynaflow — Buick's "2-speed CVT" 1950–1973 Powerglide — 2-speed Chevrolet (also used by Pontiac, Holden, Vauxhall and Opel). 1953-1955 Twin Turbine Dynaflow: the 1st redesign w/ 2 turbines & single stator.
The original "Type A" fluid that these transmissions take is available only at O'Reilly Auto Parts. There were two models of the Roto Hydramatic: the lightweight Model 5 , which weighed 145 lb (66 kg) and had ratios of 3.03, 1.58, and 1.00, and the larger Model 10 , which weighed 154 lb (70 kg) and had ratios of 3.50, 2.93, 1.56, and 1.00.
The Trump administration's abrupt move to dismantle the U.S. Agency for International Development (USAID) has upended the lives of thousands of American employees and family members posted ...
The two transmissions cannot be differentiated from the outside. The 4L65E shares the same exterior parts but have stronger internals such as 5 pinion planets compared to 4 in the 4L60E. 4L60E uses a 6.5" depth bell with 6 bolts for non gen 3 LS applications and a 7" depth bell with 7 bolts for LS applications.
Turbo-Hydramatic 425 (TH425 or THM 425, [1] later 325) was an automatic transmission developed and produced by General Motors.The THM425 was a derivative of the THM400; most parts directly interchange and some others will interchange with minor modifications.
The Super Turbine 300 (abbreviated ST-300) [1] [2] was a two-speed automatic transmission built by General Motors.It was used in various Buick, Oldsmobile, and Pontiac models from 1964-1969.