Workshop Manuals Factory service & repair Rover
Rover 400 Workshop Manual (1995-2000)20 · Automatic gearbox
20 · Transmission

Stall test

Make
Rover
Model
400 Workshop Manual
Year
1995–2000
Section
Fault diagnosis › Stall test
Automatic gearboxStall test

STALL TEST

  1. Check/top-up gearbox oil level.

CAUTION: To prevent damage to gearbox, do not carry out stall test for more than 10 seconds and do not move selector lever during test.

  1. Run engine until it reaches normal operating temperature.
  2. Apply handbrake and securely chock all four wheels.
  3. Ensure all electrical loads are switched off.
  4. Fully apply the footbrake.

WARNING: Ensure that no personnel are in vicinity of vehicle, keep handbrake and footbrake fully applied during test.

  1. Select ’2’, depress accelerator fully for 6 to 8
  2. Repeat test with selector lever in ’1’, ’D4’ and ’R’ positions noting highest engine speed obtained.

CAUTION: Allow engine to idle for 2 minutes between tests.

  1. Compare stall speeds obtained in each of the 4 selector positions, speeds should all be the same and within the range specified: Stall speed = 2400 to 2800 rev/min
  2. If stall speeds are unequal, refer to Fault Table
  3. Upon completion, carry out gearbox pressure tests.

seconds and note highest engine speed obtained.

  1. Release accelerator, allow engine to idle for 2 minutes.
FAULTPROBABLE CAUSE
Stall speed above 2800 rev/min in all 4 positionsLow fluid level Low oil pump output Sticking pressure regulator valve Slipping clutch(es)
Stall speed higher in position ’1’ one-way clutchSlipping 1st clutch, 1st hold clutch or 1st gear
Stall speed higher in position ’2’Slipping 2nd clutch
Stall speed higher in position ’D4’Slipping 1st clutch or 1st gear one-way clutch
Stall speed higher in position ’R’Slipping 4th clutch
Stall speed below 2400 rev/min in all 4 selector positionsPoor engine performance
Torque converter one-way clutch slipping

Parts & tools for this job For 1995 Rover 400

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