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.
General Operation: Transmission
Around the outside of the flywheel is a ring gear which meshes with the starter drive gear when the engine is being started with the starter motor. The transmission has four parallel shafts: the input shaft, the drive pulley shaft, the driven pulley shaft, and the final drive shaft. The input shaft is connected to the flywheel, which is connected to the IMA motor rotor through the drive plate. This is connected to the end of the engine crankshaft. The drive pulley shaft and the driven pulley shaft consists of movable and fixed face pulleys. Both pulleys are linked by the steel belt.
The input shaft includes the sun gear and the planetary gears with the carrier. The drive pulley shaft includes the drive pulley and the forward clutch. The driven pulley shaft includes the driven pulley, the start clutch, and the secondary drive gear which is integral with the park gear. The final drive shaft is positioned between the secondary drive gear and the final driven gear. The final drive shaft includes the secondary driven gear and the final drive gear which serves to change the rotation direction, because the drive pulley shaft and the driven pulley shaft rotate the same direction. Under certain conditions the planetary gears in the transmission are engaged by the forward clutch and the reverse brake, and power is transmitted from the drive pulley shaft to the driven pulley shaft to provide movement in L, S, D, and R.
Use the Manual With the Right Hardware
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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.
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