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AUTOMATIC TRANSMISSION
6. Time Lag Test
A: INSPECTION
NOTE:
When the select lever is shifted while the engine is
idling, there will be a certain time elapse or lag be-
fore the shock can be felt. Using this, check the
condition of forward brake, reverse brake, 1st one-
way clutch, forward one-way clutch and 3rd one-
way clutch.
• Perform the test at normal operation fluid tem-
perature 70 — 80°C (158 — 176°F).
• Be sure to allow a one minute interval between
tests.
• Make three measurements and take the average
value.
1) Fully apply the parking brake.
2) Start the engine.
Check the idle speed (A/C OFF).
3) Shift the select lever from "N" to "D" range. Using
a stop watch, measure the time-lag which takes
from shifting the lever until the shock is felt.
Time-lag
Specification: 1.2 sec. or less
If "N" → "D" time-lag is longer than specification:
• Line pressure too low
• Forward brake worn
• One-way clutch not operating properly
4) In the same manner, measure the time lag for
"N" → "R".
Time-lag
Specification: 1.5 sec. or less
If "N" → "R" time lag is longer than specification:
• Line pressure too low
• Reverse brake worn
Time Lag Test
5AT-34
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