A new kind of four-speed automatic transaxle, engineered from concept specifically for real-time closed-loop electronic control, has been designed, developed, and put into production by Chrysler Motors Corporation. This overdrive transaxle combines two simple planetary gear sets with five disc-clutches, five hydraulic spool valves, and four direct-acting three-way solenoid valves to achieve all operating modes. It uses no bands and only the torque converter stator has a freewheel element. It provides both a fourth ratio and increased engine torque capacity in the same package space used by the previous three-speed transaxle. At the same time, fewer parts are required and manufacturing is more readily automated.
The Chrysler A-604 Ultradrive 4-Speed Automatic Transaxle
Sae Technical Papers
SAE International Congress and Exposition ; 1989
1989-02-01
Conference paper
English
The Chrysler A-604 Ultradrive 4-speed automatic transaxle
Automotive engineering | 1989
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