Ravigneaux 2-Speed Gearset

1. Ravigneaux 2-Speed Gearset Tom Birch, 8/06

2. Ravigneaux 2-Speed Transmissions Transmissions that use a Ravigneaux 2-speed geartrain include: DaimlerChrysler: Powerflite Ford: 2-Speed General Motors: Powerglide Tom Birch, 8/06

3. Ravigneaux Gearset Input Shaft Small Sun Gear Low Band High Clutch Carrier/Output Shaft Ring Gear Reverse Clutch Tom Birch, 8/06

4. Gearset Small Sun Gear Large Sun Gear Carrier Long Pinion Ring Gear Short Pinion The Ravigneaux gearset. Tom Birch, 8/06

5. Gearset, Control Devices Reverse Clutch Low Band High Clutch This gearset uses only three apply devices. Tom Birch, 8/06

6. Neutral Reverse Clutch Low Band High Clutch All three control devices are released in neutral. Tom Birch, 8/06

7. Schematic, Neutral Ring Gear Short Pinion Long Pinion Large Sun Gear Small Sun Gear The large sun gear is always driven. With no reaction member, all of the gears will rotate, but the carrier is not driven. Tom Birch, 8/06

8. Gearset, Low Low Band Applied The low band holds the small sun gear so the short pinions are forced to walk around it. This drives the carrier at a ratio of 1.82:1. Input Reaction Output Tom Birch, 8/06

9. Schematic, Low Low Band Applied Input Reaction Output Tom Birch, 8/06

10. Gearset, High High Clutch Applied Both sun gears are driven, and both planet gears (purple) are driven in a clockwise direction. The gearset is locked to drive the carrier at a 1:1 ratio. Input Reaction Output Tom Birch, 8/06

11. Schematic, High High Clutch Applied Input Reaction Output Tom Birch, 8/06

12. Gearset, Reverse Reverse Clutch Applied The reverse clutch holds the ring gear so the short pinions are forced to walk around it. This drive the carrier at a ratio of 1.82:1. Input Reaction Output Tom Birch, 8/06

13. Schematic, Reverse Reverse Clutch Applied Input Reaction Output Tom Birch, 8/06