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- GM_Roto_Hydramatic_transmission abstract "Roto Hydramatic (sometimes spelled Roto Hydra-Matic or Roto-Hydramatic) was an automatic transmission built by General Motors and used on some Oldsmobile and Pontiac and Holden models from 1961-1965. It was based on the earlier, four-speed Hydramatic, but was more compact, providing only three forward speeds plus a small 8\" fluid coupling with a stator inside of the fluid coupling. Oldsmobile, one of the users of this transmission, called the fluid couplings stator the \"Accel-A-Rotor.\" The lightweight, aluminum-cased transmission was sometimes nicknamed the \"Slim Jim.\" HydraMatic Division calls the Roto a four range, three gear HydraMatic. It counts the stator multiplication @ 3.50 to one as a first gear, and when road speed and the two coupling halves speed match, it counts the same gear with fluid now passing straight through the stator as 2nd gear at 2.93 to one. 2nd gear or third range has a ratio of 1.56 and because the fluid coupling is drained for this gear ratio making the front clutch apply makes this a rare automatic that is in FULL mechanical lock-up (coupling drained) in second gear. Fourth range the coupling fills releasing the front clutch makes a ratio of 1 to 1. This transmission, like single and dual range, and dual coupling hydramatics also have 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. The rest is (60%) is in full mechanical connection making these hydramatics the most efficient automatic until the wide spread use of the lock-up torque converter.Roto's downfall was the 2-3 range or 1-2 gear change because it is not only a huge ratio jump from 2-3 range or 1-2 shift from 2.93 to 1.56, but also there is no fluid slippage in the coupling because the coupling drains (4 tenths of a second) to engage or apply the front clutch and so the trans goes to full mechanical connection. The other downfall of Roto HydraMatic was the extreme oil pressures in the small 8\" fluid coupling which caused transmission leaks. All HydraMatic transmissions suffer some shift quality with today's ATF fluid as Type \"A\" fluid is not available. The main ingredient of Type \"A\" was banned years ago, however Japanese cars that have CVT automatic's still use that ingredient in their special CVT fluid. That CVT fluid can only bought at the dealer. The ingredient is Whale oil. 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.".
- GM_Roto_Hydramatic_transmission wikiPageID "3274860".
- GM_Roto_Hydramatic_transmission wikiPageLength "11258".
- GM_Roto_Hydramatic_transmission wikiPageOutDegree "46".
- GM_Roto_Hydramatic_transmission wikiPageRevisionID "701491053".
- GM_Roto_Hydramatic_transmission wikiPageWikiLink Aluminium.
- GM_Roto_Hydramatic_transmission wikiPageWikiLink Automatic_Drive.
- GM_Roto_Hydramatic_transmission wikiPageWikiLink Automatic_transmission.
- GM_Roto_Hydramatic_transmission wikiPageWikiLink Bell_housing.
- GM_Roto_Hydramatic_transmission wikiPageWikiLink Buick_Skylark.
- GM_Roto_Hydramatic_transmission wikiPageWikiLink Buick_Special.
- GM_Roto_Hydramatic_transmission wikiPageWikiLink Category:Automatic_transmission_tradenames.
- GM_Roto_Hydramatic_transmission wikiPageWikiLink Category:General_Motors_transmissions.
- GM_Roto_Hydramatic_transmission wikiPageWikiLink Chevrolet_Corvair.
- GM_Roto_Hydramatic_transmission wikiPageWikiLink Clutch.
- GM_Roto_Hydramatic_transmission wikiPageWikiLink Dynaflow.
- GM_Roto_Hydramatic_transmission wikiPageWikiLink Epicyclic_gearing.
- GM_Roto_Hydramatic_transmission wikiPageWikiLink Flexplate.
- GM_Roto_Hydramatic_transmission wikiPageWikiLink Fluid_coupling.
- GM_Roto_Hydramatic_transmission wikiPageWikiLink Flywheel.
- GM_Roto_Hydramatic_transmission wikiPageWikiLink Holden.
- GM_Roto_Hydramatic_transmission wikiPageWikiLink Holden_EK.
- GM_Roto_Hydramatic_transmission wikiPageWikiLink Hydramatic.
- GM_Roto_Hydramatic_transmission wikiPageWikiLink Luton.
- GM_Roto_Hydramatic_transmission wikiPageWikiLink Manual_transmission.
- GM_Roto_Hydramatic_transmission wikiPageWikiLink Motors_Liquidation_Company.
- GM_Roto_Hydramatic_transmission wikiPageWikiLink Oldsmobile.
- GM_Roto_Hydramatic_transmission wikiPageWikiLink Oldsmobile_88.
- GM_Roto_Hydramatic_transmission wikiPageWikiLink Oldsmobile_98.
- GM_Roto_Hydramatic_transmission wikiPageWikiLink Oldsmobile_Cutlass.
- GM_Roto_Hydramatic_transmission wikiPageWikiLink Oldsmobile_Starfire.
- GM_Roto_Hydramatic_transmission wikiPageWikiLink Opel_Kapitän.
- GM_Roto_Hydramatic_transmission wikiPageWikiLink Pontiac.
- GM_Roto_Hydramatic_transmission wikiPageWikiLink Pontiac_Bonneville.
- GM_Roto_Hydramatic_transmission wikiPageWikiLink Pontiac_Catalina.
- GM_Roto_Hydramatic_transmission wikiPageWikiLink Pontiac_Grand_Prix.
- GM_Roto_Hydramatic_transmission wikiPageWikiLink Pontiac_Star_Chief.
- GM_Roto_Hydramatic_transmission wikiPageWikiLink Pontiac_Tempest.
- GM_Roto_Hydramatic_transmission wikiPageWikiLink Pontiac_Ventura.
- GM_Roto_Hydramatic_transmission wikiPageWikiLink Powerglide.
- GM_Roto_Hydramatic_transmission wikiPageWikiLink Rover_Group.
- GM_Roto_Hydramatic_transmission wikiPageWikiLink Super_Turbine_300.
- GM_Roto_Hydramatic_transmission wikiPageWikiLink The_Motor.
- GM_Roto_Hydramatic_transmission wikiPageWikiLink Torque_converter.
- GM_Roto_Hydramatic_transmission wikiPageWikiLink Transaxle.
- GM_Roto_Hydramatic_transmission wikiPageWikiLink Turbo-Hydramatic.
- GM_Roto_Hydramatic_transmission wikiPageWikiLink Ultramatic.
- GM_Roto_Hydramatic_transmission wikiPageWikiLink Vauxhall_Cresta.
- GM_Roto_Hydramatic_transmission wikiPageWikiLink Vauxhall_Velox.
- GM_Roto_Hydramatic_transmission wikiPageWikiLinkText "GM Roto Hydramatic transmission".
- GM_Roto_Hydramatic_transmission wikiPageWikiLinkText "Roto Hydra-Matic".
- GM_Roto_Hydramatic_transmission wikiPageWikiLinkText "Roto Hydra-matic".
- GM_Roto_Hydramatic_transmission wikiPageWikiLinkText "Roto Hydramatic".
- GM_Roto_Hydramatic_transmission wikiPageUsesTemplate Template:Convert.
- GM_Roto_Hydramatic_transmission wikiPageUsesTemplate Template:Powertrain.
- GM_Roto_Hydramatic_transmission wikiPageUsesTemplate Template:Reflist.
- GM_Roto_Hydramatic_transmission wikiPageUsesTemplate Template:Unreferenced.
- GM_Roto_Hydramatic_transmission subject Category:Automatic_transmission_tradenames.
- GM_Roto_Hydramatic_transmission subject Category:General_Motors_transmissions.
- GM_Roto_Hydramatic_transmission hypernym Transmission.
- GM_Roto_Hydramatic_transmission type Automobile.
- GM_Roto_Hydramatic_transmission type Motor.
- GM_Roto_Hydramatic_transmission type Redirect.
- GM_Roto_Hydramatic_transmission type Technology.
- GM_Roto_Hydramatic_transmission comment "Roto Hydramatic (sometimes spelled Roto Hydra-Matic or Roto-Hydramatic) was an automatic transmission built by General Motors and used on some Oldsmobile and Pontiac and Holden models from 1961-1965. It was based on the earlier, four-speed Hydramatic, but was more compact, providing only three forward speeds plus a small 8\" fluid coupling with a stator inside of the fluid coupling.".
- GM_Roto_Hydramatic_transmission label "GM Roto Hydramatic transmission".
- GM_Roto_Hydramatic_transmission sameAs Q5513890.
- GM_Roto_Hydramatic_transmission sameAs m.092rsr.
- GM_Roto_Hydramatic_transmission sameAs Q5513890.
- GM_Roto_Hydramatic_transmission wasDerivedFrom GM_Roto_Hydramatic_transmission?oldid=701491053.
- GM_Roto_Hydramatic_transmission isPrimaryTopicOf GM_Roto_Hydramatic_transmission.