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Home › Saab › 1996 › 9000 CS, Automatic › Repair and Diagnosis › Transmission › Automatic Trans › Overhaul - ZF 4HP 18 › Transaxle Disassembly

Transaxle Disassembly

  1. Mount transmission on work bench and secure with oil pan facing upward. Remove torque converter. Remove bearing cover bolts and CV joint. Remove oil filter cover and oil dipstick. Remove valve body cover and valve body assembly. Remove 18 bolts and torque converter housing with input shaft housing attached. Lift out differential assembly.
  2. Remove differential bearing race. Remove intermediate plate with oil pump and clutch "C". Remove angle washer and shims from turbine shaft. Loosen brake band "C" adjusting screw. Turn turbine shaft back and forth while removing clutch "A", clutch "B" and 2nd one-way clutch assembly.
  3. Separate clutch "A", clutch "B" and 2nd one-way clutch. Remove brake band and engine shaft with clutch "E". Remove intermediate shaft with 2 axial washers and axial needle bearing. Remove sun gear shaft with axial bearings, washer and angle washer. Remove drum with axial bearing, axial washer, angle washer and bearing holder. Lift out planetary spider assembly with axial bearing, washer and bearing holders.
  4. Turn transmission over, remove spur gear cover and engage parking pawl. Loosen spur gear bolts, but DO NOT  remove. Turn transmission over with oil pan side facing upward. Release parking pawl and remove spur gear bolts. Remove spur gear and output shaft.
  5. Remove spider drum. Remove hexagon bolt, spur gear and adjusting washer. Remove countershaft. Remove inner race from spur gear (output shaft).
  6. Remove tapered roller bearing inner shaft of spur gear (countershaft). Tapered roller bearing inner ring on countershaft can be pressed off. Turn transmission housing on end and remove bearing outer race with 2 jaw bearing puller. Remove sleeve and governor assembly.
  7. Turn transmission with pan facing upward and remove slotted nut. Remove bearing ring with 1st one-way clutch assembly and retainer washer. Depress brake "C" servo cover. Remove retaining ring and piston "C" assembly. Remove adjusting bolt and pin.
  8. Lift out brake "D" clutch discs and plate spring. Use compressed air to remove piston "D". Release snap ring and remove discs from clutch "B". Remove clutch "A" and "E" assembly and output shaft. Remove governor and differential assembly. Remove input shaft speedometer from converter housing. Remove selector mechanism and parking interlock from transmission housing. For further information on individual components, see COMPONENT DISASSEMBLY & REASSEMBLY  .
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