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Home >> Infiniti >> 1992 >> G20 Automatic >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Overhaul - RL4F03A >> Transaxle Disassembly

Transaxle Disassembly

  1. Remove drain plug and drain transaxle fluid. Remove the torque converter. Check torque converter one-way clutch. Refer to TORQUE CONVERTER  . Remove dipstick and dipstick tube. Remove oil cooler tube. Set manual lever to "P" position. Remove inhibitor switch. Remove oil pan and gasket. See Fig 1 . DO NOT  reuse oil pan bolts.
  2. Remove control valve assembly bolts. See Figure . Remove clip from terminal body. Push terminal body into transaxle case and remove solenoid harness. Remove manual valve from control valve assembly. Remove return spring from 3-R accumulator piston. Using compressed air, remove 3-R accumulator piston. See Fig 2 .
  3. Remove "O" rings from 3-R 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 the ACCUMULATOR SPRING SPECIFICATIONS  table.
    ACCUMULATOR SPRING SPECIFICATIONS

    Application In. (mm)
    N-D Accumulator Spring
    Free Length 1.713 (43.50)
    Outer Diameter 1.102 (280)
    3-R Accumulator Spring
    Free Length 2.220 (56.40)
    Outer Diameter .827 (21.00)
    Fig 1: Exploded View Of Transaxle Case Components
    G95D19623Courtesy of NISSAN MOTOR CO., U.S.A.
    Fig 2: Removing N-D & 3-R Accumulator Pistons
    G93J23415Courtesy of NISSAN MOTOR CO., U.S.A.
    Fig 3: Removing N-D & 3-R Accumulator Pistons
    G93A23416Courtesy of NISSAN MOTOR CO., U.S.A.
  4. Remove lip seals from band servo oil port. Using snap ring pliers, remove governor valve oil filter. Check filter for damage or clogging. Remove throttle cable from throttle lever. Remove throttle cable mounting bolt and remove throttle cable from transaxle case. 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. It may be necessary to tap differential assembly with soft-faced hammer to remove assembly from case. Using a hammer and screwdriver, remove oil seal from converter housing, being careful not to damage converter housing. Remove seal from transaxle case.
  6. Remove oil tube from converter housing. Remove "O" ring from input shaft. See Fig 4 . 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 5 .
  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. Remove low one-way clutch from front planetary carrier by rotating one-way clutch counterclockwise. Remove needle bearing from planetary carrier. See Fig 5 . 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. 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 and bearing race from transaxle case. Remove side cover bolts and side cover. See Fig 1 .
    NOTE: DO NOT  reuse side cover bolts.
  13. Set manual lever to "P" position to lock idler gear and output gear. Using a hammer and pin punch, unlock both idler gear and output gear lock nuts. Remove idler gear and output gear lock nuts.
    NOTE: DO NOT  reuse idler gear or output gear lock nuts.
  14. Using appropriate puller, remove idler gear and output gear. Remove reduction gear and output shaft. Remove adjusting shim from reduction gear. Remove adjusting spacer from output shaft.
  15. Remove return spring from parking shaft. Remove parking shaft and parking pole from transaxle case. Check parking shaft and pole 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 governor assembly snap ring. Remove spacer from governor cap. Using pliers, remove governor cap. Remove the "O" ring from the governor cap. Remove the governor valve assembly. See Fig 1 .
  16. With low primary weight closed, ensure governor valve lowers under its own weight. Check low and high secondary weight operation. See Fig 6 . Using a hammer and screwdriver, remove side oil seal from transaxle case. Remove manual shaft and throttle lever components. See MANUAL SHAFT & THROTTLE LEVER  under COMPONENT DISASSEMBLY & REASSEMBLY.
Fig 4: Exploded View Of Torque Converter Housing & Differential Components
G95E19624Courtesy of NISSAN MOTOR CO., U.S.A.
Fig 5: Exploded View Of Forward Clutch, High Clutch, Low-Reverse Brake, Overrun Clutch & Reverse Clutch Assemblies
G93C23418Courtesy of NISSAN MOTOR CO., U.S.A.
Fig 6: Identifying Governor Valve Components
G93D23419Courtesy of NISSAN MOTOR CO., U.S.A.
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