Control Pressure Test
NOTE:
When testing line pressure, 2 readings must be taken: one at Idle position (zero T.V. opening) and the other at WOT (full T.V. opening).
- Connect a 0-300 psi (0-21.1 kg/cm2 ) pressure gauge to main line pressure port tap on left side of transmission case just above control levers. See Figure . Gauge hose must be long enough to read gauge while operating engine.
- Connect a 0-100 psi (0-7.0 kg/cm2
) pressure gauge to T.V. pressure tap at right side of transmission case. See Figure
. Gauge hose must be long enough to read gauge while operating engine. Ensure T.V. linkage is properly adjusted.CAUTION: Pressure gauges affect transmission shift quality. DO NOT accelerate or decelerate rapidly. Possible transmission failure could result.
- With engine at normal operating temperature, apply parking and service brakes. Check line pressure and throttle pressure in all ranges. Pressure should be approximately as specified. Refer to CONTROL PRESSURE SPECIFICATIONS table.
NOTE:
Pressure test at idle position must be taken with engine at normal operating temperature. Pressure test at WOT position should be taken at full stall conditions. Run engine at a fast idle in "N" for 2 minutes to cool fluid between tests.
CONTROL PRESSURE SPECIFICATIONS (1)
| Throttle Position | Line Press. psi (kg/cm2 ) | TV Limit: psi (kg/cm2 ) | |||
|---|---|---|---|---|---|
| At Idle | |||||
| "R" | 75-90 (5.3-6.3) | 0 | |||
| All Other Ranges | 55-65 (3.9-4.6) | 0 | |||
| WOT Stall - In "R" | |||||
| 3.8L SC | 250-300 (17.6-21.1) | 79-91 (5.6-6.4) | |||
| All Trucks | 250-300 (17.6-21.1) | 79-91 (5.6-6.4) | |||
| All Others | 250-290 (17.5-20.3) | 79-91 (5.6-6.4) | |||
| WOT Stall - All Other Ranges | |||||
| 3.8L SC | 176-204 (12.4-14.3) | 79-91 (5.6-6.4) | |||
| All Trucks | 176-204 (12.4-14.3) | 79-91 (5.6-6.4) | |||
| All Others | 180-215 (12.6-15.1) | 79-91 (5.5-6.4) | |||
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