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Home >> Infiniti >> 2000 >> G20 Base, Automatic, RE4F03W >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission Overhaul - Re4F03B/W >> Transaxle Disassembly

Transaxle Disassembly

  1. Remove drain plug and drain fluid. Remove torque converter. Check torque converter one-way clutch. See TORQUE CONVERTER  under COMPONENT TESTS. Remove dipstick and dipstick tube. Remove oil cooler tube. Place manual lever in Park. Remove PNP switch. Remove oil pan and gasket. See Fig 1 . DO NOT reuse oil pan bolts.
  2. Remove valve body assembly bolts. See Figure . Remove clip from solenoid harness terminal body. Push terminal body into transaxle case and remove solenoid harness. Remove manual valve from valve body assembly. Remove return spring from servo release accumulator piston. Using compressed air, remove servo release accumulator piston. See Figure and Figure .
  3. Remove "O" rings from servo release accumulator piston. Using compressed air, remove N-D accumulator piston and return spring. See Fig 2 . Remove "O" rings from N-D accumulator piston. Check accumulator pistons and contact surface of transaxle case for damage. Check accumulator return springs free length and diameter. See ACCUMULATOR SPRING SPECIFICATIONS  table.
    ACCUMULATOR SPRING SPECIFICATIONS

    Application In. (mm)
    N-D Accumulator
    Free Length 1.77 (45.0)
    Outer Diameter 1.09 (27.6)
    Servo Release Accumulator
    Free Length 2.07 (52.5)
    Outer Diameter .79 (20.1)
    Fig 1: Exploded View Of Transaxle Case Components
    G00031989Courtesy of NISSAN MOTOR CO., U.S.A.
    Fig 2: Removing N-D & Servo Release Accumulator Pistons
    G93J23415Courtesy of NISSAN MOTOR CO., U.S.A.
  4. Remove lip seals from band servo oil port. See Figure and Fig 2 . Remove converter housing bolts and remove converter housing by tapping housing with soft-faced hammer. Remove "O" ring from differential oil port.
  5. Remove differential assembly from transaxle case. Use appropriate puller to remove differential side bearing outer race from transaxle case and converter housing. Remove differential side bearing adjustment shim from transaxle case.
  6. Using a hammer and screwdriver, remove oil seal from converter housing, being careful not to damage converter housing. Remove oil tube from converter housing. Remove "O" ring from input shaft. Remove oil pump assembly bolts and remove oil pump assembly from transaxle case. Remove thrust washer and bearing race from oil pump assembly. Loosen anchor end pin lock nut, then back off anchor end pin.
  7. Remove brake band from transaxle case. When removing brake band, insert wire clip into brake band ends for support. To prevent brake lining from cracking or peeling, DO NOT stretch brake band. Check brake band facing for damage, cracks, wear or burns. Remove high clutch (with input shaft assembly) and reverse clutch assemblies. Remove high clutch from reverse clutch. See Fig 4 .
  8. Remove needle bearing from high clutch drum. Remove high clutch hub and needle bearing from transaxle case. Remove front sun gear and needle bearings from transaxle case. Check all components for damage or wear.
  9. Remove snap ring and front planetary carrier assembly with low one-way clutch. Ensure low one-way clutch rotates counterclockwise only. See Fig 3 . Remove low one-way clutch from front planetary carrier by rotating one-way clutch counterclockwise. Remove needle bearing from planetary carrier. See Fig 4 . Check all components for damage or wear.
  10. Remove rear planetary carrier assembly from transaxle case. Remove rear sun gear from rear planetary carrier. Remove needle bearings from rear planetary carrier. Check all components for damage or wear.
  11. Using a feeler gauge, check clearance between pinion washer and planetary carrier. See Fig 5 . Clearance between pinion washer and planetary carrier should be .006-.028" (.15-.70 mm). Replace appropriate planetary carrier if clearance exceeds .031" (.80 mm).
  12. Remove rear internal gear from transaxle case. Remove needle bearing from rear internal gear and check bearing for damage or wear. Remove forward clutch assembly from transaxle case. Remove thrust washer from transaxle case. See Fig 1 .
  13. Remove side cover bolts. Remove side cover by lightly tapping cover with soft-faced hammer. Remove differential side bearing adjusting shim. Remove output shaft assembly. Output shaft assembly may be removed together with side cover. DO NOT drop output shaft assembly. Remove side cover from output shaft assembly (if necessary). Remove needle bearing.
  14. Place manual lever in Park to lock idler gear. Using a hammer and pin punch, unlock idler gear lock nut. Remove idler gear lock nut. Use appropriate puller to remove idler gear. Remove reduction gear. Remove adjusting shim from reduction gear.
  15. Remove return spring from parking shaft. Remove parking shaft and parking pawl from transaxle case. Check parking shaft and pawl for wear or damage. Note direction of parking actuator support and remove actuator support from transaxle case. Inspect actuator support for wear or damage. Remove revolution sensor from transaxle. See Fig 1 .
  16. Remove manual shaft and throttle lever components. See MANUAL SHAFT & THROTTLE LEVER  under COMPONENT DISASSEMBLY & REASSEMBLY.
Fig 3: Checking Low One-Way Clutch Operation
G99D08347Courtesy of NISSAN MOTOR CO., U.S.A.
Fig 4: Exploded View Of Forward Clutch, High Clutch, Low-Reverse Brake, Overrun Clutch & Reverse Clutch Assemblies
G95F19732Courtesy of NISSAN MOTOR CO., U.S.A.
Fig 5: Measuring Pinion Gear Clearance (Typical)
G99F08348Courtesy of NISSAN MOTOR CO., U.S.A.
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