Gearbox pressure tests

GEARBOX PRESSURE TESTS

1. Check/top-up gearbox oil level.
2. Raise front and rear of vehicle.

WARNING: Support on safety stands

3. Run engine until it reaches normal operating temperature.

WARNING: Gearbox oil at operating temperature is very hot, take great care to avoid burns when removing and refitting inspection plugs and gauges

LINE PRESSURE TEST

1. Remove line pressure inspection plug, discard sealing washer.
2. Connect one gauge (0 to 20 bar) of gauge set 18G 1554 to inspection plug hole.
3. Select either ’P’ or ’N’.
4. Run engine at 2000 rev/min and observe line pressure recorded on gauge: Line pressure - standard = 8.2 to 8.9 bar Service limit = 7.5 bar
5. If line pressure is below service limit, cause is either: Faulty torque converter Low oil pressure Pressure regulator faulty Sticking torque converter check valve
6. On completion of test, disconnect gauge.
7. Fit a new sealing washer to inspection plug, fit and tighten plug to 18 Nm.
8. Carry out clutch pressure test