Shift Elements
The other shift elements in addition to the torque converter lock-up clutch are:
- Three rotating multi-plate clutches A, B and E.
- Two fixed multi-disc brakes C and D.
All gear shifts from 1st to 6th or from 6th to 1st are power-on overlapping shifts, that is to say during the shift one of the clutches must continue to transmit the drive at lower main pressure until the other clutch is able to accept the input torque.
The shift elements, clutches or brakes are engaged hydraulically. The transmission fluid pressure is built up between the cylinder and the piston, this presses the clutch plates together.
When the transmission fluid pressure drops, the cup spring pressing against the piston moves it back to its original position.
The purpose of these shift elements is to perform in-load shifts with no interruption to traction.
Multi-plate clutches A, B and E supply power from the engine to the planetary gear train; multi-disc brakes C and D bear against the transmission housing in order to achieve a torque reaction effect.