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Home >> Jeep >> 1983 >> Scrambler Base, 4.2 C, Standard, T4 >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Diagnosis & Overhaul - 727, 904, 998 & 999 >> Testing >> Hydraulic Pressure Adjustments >> Line Pressure

Line Pressure

  1. Incorrect throttle pressure setting will cause incorrect line pressure readings even though line pressure adjustment is correct. Always inspect and correct throttle pressure adjustment before adjusting line pressure.
  2. Turn Allen screw in end of pressure regulator spring bracket so measurement between valve body and inner edge of adjusting nut is 1 5/16" (33.34 mm). Due to manufacturing tolerances, adjustment can be varied to obtain specified line pressure.
    Fig 1: Measuring Line Pressure Adjustment
    G96F15649Courtesy of CHRYSLER MOTORS
  3. One complete turn of adjusting screw changes closed throttle line pressure approximately 1.7 psi (.12 kg/cm2 ). Turning adjusting screw counterclockwise increases pressure. Turning clockwise decreases pressure.