Subaru Forester AutomaticTransmission 1999 2000 (41) PDF

9. Time Lag Test
A: INSPECTION
1. GENERAL INFORMATION
If the shift lever is shifted while the engine is idling,
there will be a certain time elapse or lag before the
shock can be felt. This is used for checking the
condition of the low clutch, reverse clutch, low &
reverse brake and one-way clutch.
CAUTION:
Perform the test at normal operation fluid
temperature 60 to 80C (140 to 176F).
Be sure to allow a one minute interval
between tests.
Make three measurements and take the aver-
age value.
2. TEST METHODS
1) Fully apply the parking brake.
2) Start the engine.
Check engine speed is in idling speed (A/C OFF).
3) Shift the shift lever from ?N? to ?D? range.
Using a stop watch, measure the time it takes from
shifting the lever until the shock is felt.
Time lag: Less than 1.2 seconds
4) In same manner, measure the time lag for ?N?
? ?R?.
Time lag: Less than 1.5 seconds
3. EVALUATION
1) If ?N? ? ?D? time lag is longer than specified:
Line pressure too low
Low clutch worn
One-way clutch not operating properly
2) If ?N? ? ?R? time lag is longer than specified:
Line pressure too low
Reverse clutch worn
Low & reverse brake worn
10. Line Pressure Test
A: MEASUREMENT
1. GENERAL INFORMATION
If the clutch or the brake shows a sign of slippage
or shifting sensation is not correct, the line pres-
sure should be checked.
Excessive shocks during upshifting or shifting
takes place at a higher point than under normal
circumstances, may be due to the line pressure
being too high.
Slippage or inability to operate the vehicle may,
in most cases, be due to loss of oil pressure for the
operation of the clutch, brake or control valve.
1) Line pressure measurement (under no load)
CAUTION:
Before measuring line pressure, jack-up all
wheels.
Maintain temperature of ATF at approxi-
mately 50C (122F) during measurement.
(ATF will reach the above temperature after
idling the engine for approximately 30 minutes
with select lever in ?N? or ?P?.)
2) Line pressure measurement (under heavy load)
CAUTION:
Before measuring line pressure, apply both
foot and parking brakes with all wheels
chocked (Same as for ?stall? test conditions).
Measure line pressure when select lever is in
?R?, ?2? with engine under stall conditions.
Measure line pressure within 5 seconds after
shifting the select lever to each position. (If line
pressure needs to be measured again, allow
the engine to idle and then stop. Wait for at
least one minute before measurement.)
Maintain the temperature of ATF at approxi-
mately 50C (122F) during measurement. (ATF
will reach the above temperature after idling
the engine for approximately 30 minutes with
the select lever in ?N? or ?P?.)
49
[W10A1] 3-2SERVICE PROCEDURE
10. Line Pressure Test

Subaru Forester AutomaticTransmission 1999 2000 (41) Summary of Content

9. Time Lag TestA: INSPECTION1. GENERAL INFORMATIONIf the shift lever is shifted while the engine is idling,there will be a certain time elapse or lag before theshock can be felt. This is used for checking thecondition of the low clutch, reverse clutch, low reverse brake and one-way clutch.CAUTION: Perform the test at normal operation fluidtemperature 60 to 80C (140 to 176F). Be sure to allow a one minute intervalbetween tests. Make three measurements and take the aver-age value.2. TEST METHODS1) Fully apply the parking brake.2) Start the engine.Check engine speed is in idling speed (A/C OFF).3) Shift the shift lever from N to D range.Using a stop watch, measure the time it takes fromshifting the lever until the shock is felt.Time lag: Less than 1.2 seconds4) In same manner, measure the time lag for N R.Time lag: Less than 1.5 seconds3. EVALUATION1) If N D time lag is longer than specified: Line pressure too low Low clutch worn One-way clutch not operating properly2) If N R time lag is longer than specified: Line pressure too low Reverse clutch worn Low reverse brake worn10. Line Pressure TestA: MEASUREMENT1. GENERAL INFORMATIONIf the clutch or the brake shows a sign of slippageor shifting sensation is not correct, the line pres-sure should be checked. Excessive shocks during upshifting or shiftingtakes place at a higher point than under normalcircumstances, may be due to the line pressurebeing too high. Slippage or inability to operate the vehicle may,in most cases, be due to loss of oil pressure for theoperation of the clutch, brake or control valve.1) Line pressure measurement (under no load)CAUTION: Before measuring line pressure, jack-up allwheels. Maintain temperature of ATF at approxi-mately 50C (122F) during measurement.(ATF will reach the above temperature afteridling the engine for approximately 30 minuteswith select lever in N or P.)2) Line pressure measurement (under heavy load)CAUTION: Before measuring line pressure, apply bothfoot and parking brakes with all wheelschocked (Same as for stall test conditions). Measure line pressure when select lever is inR, 2 with engine under stall conditions. Measure line pressure within 5 seconds aftershifting the select lever to each position. (If linepressure needs to be measured again, allowthe engine to idle and then stop. Wait for atleast one minute before measurement.) Maintain the temperature of ATF at approxi-mately 50C (122F) during measurement. (ATFwill reach the above temperature after idlingthe engine for approximately 30 minutes withthe select lever in N or P.)49[W10A1] 3-2SERVICE PROCEDURE10. Line Pressure Test