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These use a Chrysler custom Torqueflite 904 automatic transmission with an integral Chevrolet bellhousing. Do not confuse with later AMC 2.5 L engine that uses GM small corporate pattern . Chevrolet Turbo-Thrift engine (post-1962) Chevrolet 153 Inline 4 (Chevy II, pre-Iron-Duke - includes the Vortec 3000/181 industrial/marine crate motor)
After the 1974 SD455 was dropped the 1975 Firebird's top performance engine was an 'L78' Pontiac 400 cu in (6.6 L). 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.
This transmission, like single and dual range and dual coupling hydramatics, also has the feature of split torque in the transmission, whereby in fourth (or high) gear only 40% to 50% depending on transmission—40% in Roto's case—but because of the design the coupling is only required to carry 40% of the engine torque.
Saginaw M26/27 transmission — 3 and 4-speed longitudinal light duty (less than 300 hp) wide ratio manual transmission made by GM at their Saginaw, Michigan factory; Muncie M62/M64 — 3-speed longitudinal transmission made by GM; Muncie SM318 transmission — 3-speed transmission used from 1954 through 1969 in both passenger car and truck ...
The 455 cu in (7.5 L) V8 remained optional but it rated power lowered to 250 hp (190 kW) and was available only with the Turbo Hydra-Matic transmission. The 455 HO engine was discontinued, though GM initially announced the availability of a Super Duty 455 engine (shared with the contemporary Pontiac Trans Am SD455), and several such cars were ...
Oldsmobile went even further by creating a whole new full-sized series, the Jetstar 88, which was $75 lower than the Dynamic 88 series (but still a few dollars higher than comparable Pontiac Catalina models) and also got a smaller engine - a 330 cu in (5.4 L) V8 and two-speed automatic transmission from the intermediate F-85/Cutlass line, along ...
The engine had a remarkably low idle speed of 450 rpm with standard transmission and 375 rpm (while in drive) for the automatic; [5] a modern engine is usually tuned to a minimum 600-700 rpm. The electrical system was a 6-volt primary with a negative ground, and a conventional mechanical ignition , with the firing order 1-6-2-5-8-3-7-4.
Most of the V8/Powerglide transmissions came with the 1.76 gear set. One notable exception was the export version of the transmission, which offered only the 1.82 ratio and was used by Holden in Australia behind their Australian built 6-cylinder and V8 engines. Holden vehicles fitted with Chevrolet V8 engines used the 1.76 ratio gear-set.
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