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Home >> Chevrolet >> 2005 >> Aveo Base, 4D Hatchback >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 3 (Automatic Transmission - Removal & Installation, Service, Overhaul, Troubleshooting & Diagnosis) >> Description and Operation >> Manual Fourth Gear >> Notes

Manual Fourth Gear: Notes

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Manual Fourth Gear

Position Solenoid Clutch Brake 1-Way Clutch
Shift 1 Shift 2 Timing C1 C2 C3 B1 B2 B3 F1 F2
D 4th OFF ON OFF OFF ON OFF ON ON OFF OFF OFF
Fig 1: Manual Fourth Gear Schematics
GM1248565Courtesy of GENERAL MOTORS CORP.

A. Front Planetary Gear

B. Rear Planetary Gear

D - 4th Gear

  1. The input shaft rotates clockwise.

    The direct clutch (C2) operates. Connect the input shaft to the planetary carrier.

  2. The planetary carrier revolves clockwise.
  3. The planetary long pinion rotates itself clockwise.
  4. The rear planetary sun gear is going to rotate counterclockwise.

    The O/D and 2nd brake (B1) operates. Lock rotates the planetary sun gear.

  5. The planetary long pinion revolves clockwise while rotating itself clockwise.
  6. The ring gear rotates clockwise.
  7. The counter drive gear rotates clockwise for the ring gear and one.
  8. The counter driven gear rotates counterclockwise.
  9. The differential gear drive pinion rotates counterclockwise for the counter driven gear and one.
  10. The differential gear rotates clockwise.