ZF automatic gearbox
- Make
- Land Rover
- Model
- Defender 90 Workshop Manual (NAS)
- Section
- Fault diagnosis › ZF automatic gearbox
Automatic gearboxZF automatic gearbox
ZF AUTOMATIC GEARBOX
Before referring to fault symptoms, carry out initial static checks first:
INITIAL STATIC CHECKS
| Check start positions | ’P’ & ’N’ only |
| Reverse lights | ’R’ only |
| Gear engagements | N-D,N-3,N-2,N-1,N-R |
| Full throttle | Engine switched off, check full travel at engine and at pedal. |
| Oil level | ’N’ selected, engine running at normal running temperature. |
Pressure test
| 2000 rev/min | 10 ± 0.3 bar |
| Idle pressure at 665 to 735 rev/min | 6.9 ± 0.3 bar |
To fit pressure gauge
Service tools: See Service tools, Automatic Gearbox
Pressure gauge 0 to 20 bar, 0 to 300 lbf/in2. Flexible hose adaptor.
150 ± 5 lbf/in22 100 ± 5 lbf/in
- Site vehicle on a ramp [hoist].
- From under gearbox, remove socket head plug (located 10cm, 4 in from oil pipe). Fit hose adaptor LST502-1.
- Fit hose to adaptor.
- Fit gauge 18G502Ato hose and route into vehicle, ensuring hose is clear of rotating parts and exhaust pipes.
- Carry out road test. See Road Test Procedure
- Remove pressure gauge
Parts & tools for this job For Land Rover Defender
- PARTTransmission filter kitSearch: Land Rover Defender transmission filter kit
- FLUIDAutomatic transmission fluidSearch: Land Rover automatic transmission fluid
- TOOLFluid transfer pumpSearch: fluid transfer pump
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