Eclipse FWD L4-1997cc 2.0L DOHC MFI (1997)
Clutch: Testing and Inspection
AIR PRESSURE TESTS
Inoperative clutches can be located using a series of tests by substituting air pressure for fluid pressure.
The clutches may be tested by applying air pressure to their respective passages.
Remove the valve body and then install the special tool MB995053 or equivalent. To make air pressure tests, go on as follows: The compressed air
supply must be free of all dirt and moisture. Use a pressure of 207 kPa (30 psi).
Remove oil pan and valve body. See Valve body removal.
Overdrive Clutch
Apply air pressure to the overdrive clutch apply passage and watch for the push/pull piston to move forward. The piston should return to its
starting position when the air pressure is removed.
Reverse Clutch
Apply air pressure to the reverse clutch apply passage and watch for the push/pull piston to move rearward. The piston should return to its starting
position when the air pressure is removed.
2/4 Clutch
Apply air pressure to the feed hole located on the 2/4 clutch retainer. Look in the area where the 2/4 piston contacts the first separator plate and
watch carefully for the 2/4 piston to move rearward. The piston should return to its original position after the air pressure is removed.
Low/Reverse Clutch
Apply air pressure to the low/reverse clutch feed hole (rear of case, between 2 bolt holes). Then, look in the area where the low/reverse piston
contacts the first separator plate and watch carefully for the piston to move forward. The piston should return to its original position after the air
pressure is removed.
Underdrive Clutch
Because this clutch piston cannot be seen, its operation is checked by function. Air pressure is applied to low/reverse and the 2/4 clutches. This
locks the output shaft. Use a piece of rubber hose wrapped around the input shaft and a pair of clamp-on pliers to turn the input shaft. Next apply
air pressure to the underdrive clutch. The input shaft should not rotate with hand torque. Release the air pressure and confirm that the input shaft
will rotate.
