Stall Test; Measure Stall Speed - Toyota LAND CRUISER Service Manual Supplement
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Also See for LAND CRUISER:
- Owner's manual (623 pages) ,
- Repair manual (19 pages) ,
- Owner's manual (256 pages)
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AUTOMATIC TRANSMISSION (STATION WAGON) - TROUBLESHOOTING
STALL TEST
The objective of this test is to check the overall performance of the transmission and engine by mea-
suring the stall speeds in the D and R ranges.
NOTICE:
• Perform the test at normal operating fluid temperature (50 — 80°C, or 122 — 176°F).
• Do not continuously run this test longer than 5 seconds.
• To ensure safety, conduct this test in a wide, clear, level area, which provides good traction.
• The stall test should always be carried out in pairs. One should observe the conditions of wheels or
wheel stoppers outside the vehicle while the other is performing the test.
MEASURE STALL SPEED
(a)
Warm up the transmission fluid.
(b)
Check the front and rear wheels.
(c)
Connect a tachometer to the engine.
(d)
Fully apply the parking brake.
(e)
Keep your left foot pressed firmly on the brake pedal.
(f)
Start the engine.
(g)
Shift into the D range. Step all the way down on the accelerator pedal with your right foot. Quickly
read the stall speed at this time.
NOTICE:
Release the accelerator pedal and stop test if the rear wheels begin to rotate before the en-
gine speed reaches specified stall speed.
Stall speed:
(1FZ-FE engine)
(1HD-T engine)
(h)
Perform the same test in R range.
EVALUATION
(a)
If the stall speed is the same for both positions but lower than specified value:
• Engine output may be insufficient
• Stator one-way clutch is not operating properly
HINT:
If more than 600 rpm below the specified value, the torque converter clutch could be faulty.
(b)
If the stall speed in D range is higher than specified:
• Line pressure too low
• Forward clutch slipping
• No.2 one-way clutch not operating properly
• O/D one-way clutch not operating properly
(c)
If the stall speed in R range is higher than specified:
• Line pressure too low
• Direct clutch slipping
• First and reverse brake slipping
• O/D one-way clutch not operating properly
(d)
If the stall speed in both R and D ranges are higher than specified:
• Line pressure too low
• Improper fluid level
• O/D one-way clutch not operating properly
2,150 ± 150rpm
1,950 ± 150rpm
AT-43
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Troubleshooting
