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Home >> Jeep >> 1990 >> Wagoneer >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Overhaul - Aw-4 >> Performance Tests >> Hydraulic Pressure Tests >> Pressure Test Procedure

Pressure Test Procedure

  1. Connect pressure test gauge to test port on passenger side of transmission. Be sure test gauge capacity is a minimum of 300 psi (2100 kPa).
  2. Bring transmission fluid to normal operating temperature. Apply parking brake and block wheels.
  3. Check and adjust engine curb idle speed. Apply service brake.
  4. Shift transmission into "D" range and note line pressure with engine at curb idle speed. Pressure should be 53-61 psi (363-422 kPa).
  5. CAUTION: DO NOT maintain wide open throttle for more than 3-4 seconds at a time.
  6. Press accelerator to wide open throttle position and note line pressure. Pressure should be 161-196 psi (1108-1353 kPa).
  7. Shift transmission into Reverse and note line pressure with engine at curb idle speed. Pressure should be 73-87 psi (500-598 kPa).
  8. CAUTION: DO NOT maintain wide open throttle for more than 3-4 seconds at a time.
  9. Press accelerator to wide open throttle position and note line pressure in Reverse. Pressure should be 223-273 psi (1540-1883 kPa).
  10. If line pressure is not within specifications, adjust line pressure cable and repeat pressure test.