Overview Transmission
| Callout | Component Name |
|---|---|
| 1 | Torque converter |
| 2 | Transmission's output gear |
| 3 | Intermediate shaft |
| 4 | Differential |
| b1 | Brake |
| b2 | Brake |
| c1 | Clutch |
| c2 | Clutch |
| c3 | Clutch |
| f1 | Free Wheel |
The transmission has 2 planetary gear units; front and rear. The front one is a single planetary gear and the rear one is double. The rear unit is Ravigneaux type with two planet gears between the rear sun gear and the only ring gear, which is the transmission output shaft. The two planet gears are fitted on a common planet carrier.
The front planetary gear sun gear is fixed and the power from the torque converter enters via its ring gear. This entails a reduction of the planet carrier speed used for gear 1-5 and R. The power from the planet carrier is conveyed to the rear planetary gear unit via clutches C1 and C3.
The rear planetary gear unit receives power either directly from the torque converter via clutch C2 or from the front planetary gear via clutches C1 and C3. The 2 brakes, B1 and B2, are used to hold firm the components in the rear planetary gear unit. B2 is combined with a free wheel (F1).
The activation of one or more friction elements results in a gear ratio. Brakes and clutches are activated hydraulically using solenoids controlled by the transmission control module (TCM).
The table shows the active elements for each of the gears.
| Gear Position | C1 | C2 | C3 | B1 | B2 | B3 |
|---|---|---|---|---|---|---|
| P/N | - | - | - | - | - | - |
| R | - | - | X | - | X | - |
| 1 | X | - | - | - | (X) | X |
| 2 | X | - | - | X | - | - |
| 3 | X | - | X | - | - | - |
| 4 | X | X | - | - | - | - |
| 5 | - | X | X | - | - | - |
| 6 | - | X | - | X | - | - |
| (X) Only when engine braking. | ||||||