Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Shift Elements
In addition to the torque converter, the other shift elements are:
- three rotating multi-plate clutches: forward, direct and overdrive.
- two fixed multi-disc brakes: intermediate and overdrive.
All gear shifts from 1st to 6th or from 6th to 1st are power-on overlapping shifts. That is, 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 builds up between the cylinder and the piston, pressing the clutches together.
The purpose of these shift elements is to carry out in-load shifts with no interruption to traction.
Multi-plate clutches, forward, direct and overdrive, supply power from the engine to the planetary geartrain. Multi-disc brakes intermediate and low/reverse press against the transmission housing in order to achieve a torque reaction effect.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.