AUTOMATIC TRANSAXLE DIAGNOSIS
TSB Revision
AUTOMATIC TRANSAXLE
23A-313
STEP 3. Check the hydraulic pressure (for reverse clutch).
Measure the hydraulic pressure for reverse clutch when the
selector lever is at the "R" range. Check if the hydraulic pres-
sure is within the standard value. Refer to
P.23A-28
, Hydraulic
Pressure Test.
Q: Is the hydraulic pressure within the standard value?
YES : Go to Step 4.
NO : Go to Step 9.
STEP 4. Check the hydraulic pressure (for low-reverse
brake).
Measure the hydraulic pressure for low-reverse brake when the
selector lever is at the "R" range. Check if the hydraulic pres-
sure is within the standard value. Refer to
P.23A-28
, Hydraulic
Pressure Test.
Q: Is the hydraulic pressure within the standard value?
YES : Go to Step 5.
NO : Go to Step 9.
STEP 5. Check the reverse clutch system and low-reverse
brake system.
(1) Remove the valve body cover and valve body. Refer to
P.23A-423
, Transaxle Assembly and GROUP 23B,
Transaxle
P.23B-10
.
(2) Blow 108 kPa (15 psi) compressed air into the reverse
clutch oil orifice of the transaxle case, and check if the
reverse clutch piston moves and air pressures are
maintained in that condition. Repeat for the low-reverse
brake.
Q: Are both air pressures maintained?
YES : Go to Step 6.
NO : Go to Step 9.
STEP 6. Check the reverse clutch and low-reverse brake.
(1) Remove the transaxle assembly.
(2) Check the facing for seizure and the piston seal ring for
damage and interference with the retainer. Repair or
replace the faulty parts. Refer to GROUP 23B, Transaxle
P.23B-10
, Reverse and Overdrive Clutch
P.23B-59
. Then
check for the symptom.
Q: Is the symptom eliminated?
YES : The procedure is complete.
NO : Go to Step 10.
AC001862
REVERSE CLUTCH
OIL ORIFICE
LOW-REVERSE
BRAKE OIL ORIFICE
AB
AC001863 AB
LOW-REVERSE BRAKE
REVERSE CLUTCH