Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Power steering gear (ZF): Notes
- Do not re-use fasteners that are worn or deformed in normal use.
- Some fasteners are designed to be used only once, and are unreliable and may fail if used a second time. This includes, but is not limited to, nuts, bolts, washers, circlips and cotter pins. Always follow recommendations in this manual-replace these fasteners with new parts where indicated, and any other time it is deemed necessary by inspection.
If power steering gear is malfunctioning determine cause using pressure tests and leakage tests. If a malfunction exists, then replace the steering gear.
- If reservoir fluid is low check steering system for leaks.
- If leaks occur at line connections, tighten connections, wipe area dry and recheck for leaks.
- To check rack seals, loosen the hose clip on the boot and push boot to one side.
- Always replace all self-locking nuts and bolts.
- Do not attempt to weld or straighten steering components.
- Use only steering gear grease, Part No. AOF 063 000 04, to grease steering rack.
- Type of oil: hydraulic oil, Part No. G 002 000
- System oil capacity: 0.7-0.9 liter (0.74-0.95 US qt.)
- Suction hose and pressure line routing, see POWER STEERING PUMP, RESERVOIR AND HYDRAULIC LINES, SERVICING .
The following list pertains to Fig 1.
- Tie rod end right
- Separating, see REMOVING
- Checking, see TIE ROD ENDS, CHECKING
- Revised Cabrio tie rod end, see REVISED TIE ROD END, CABRIO
- 50 N.m (37 ft lb)
- Hose clamp
- Boot
- Remove tie rod end before removing
- Check for wear (cuts, cracks), make sure sealing surfaces and sealing lips are clean and undamaged
- End diameters are larger than those of TRW power steering gear
- Not interchangeable with boot for TRW steering gear
- Clamp
- Always replace
- Tightening, see INSTALLING
- Not interchangeable with clamps for TRW steering gear
- Tie rod, left
- Removing and installing, see TIE RODS (TRW OR ZF), REMOVING AND INSTALLING
- Adjusting to length, see INSTALLING
- Not interchangeable with tie rod for TRW steering gear
Seat dia. of boot -4- at tie rod:
- ZF: 15 mm (0.59 in.)
- TRW: 12.7 mm (0.50 in.)
- Clamp
- Use pliers to remove
- Tightening, see INSTALLING
- Not interchangeable with clamps for TRW steering gear
- Tie rod, right
- Removing and installing, see INSTALLING
- Wheel alignment, see WHEEL ALIGNMENT, CHECKING
- Not interchangeable with tie rod for TRW steering gear
Seat dia. of boot -4- at tie rod:
- ZF: 15 mm (0.59 in.)
- TRW: 12.7 mm (0.50 in.)
- Tie rod end left
- Separating, see REMOVING
- Checking, see TIE ROD ENDS, CHECKING
- Revised Cabrio tie rod end, see REVISED TIE ROD END, CABRIO
- Self-locking hex nut
- Always replace
- 30 N.m (22 ft lb)
- Pressure balancing line
- Self-locking hex nut
- Always replace
- 30 N.m (22 ft lb)
- Clamp
- Rubber mounting
Inside diameter:
- ZF: 50 mm (1.97 in.)
- TRW: 44 mm (1.73 in.)
- Steering gear
- Removing and installing, see POWER STEERING, SERVICING
- Check turning torque
- Turning torque on vehicles equipped with VR6 engine is approx. 2 N.m (18 in. lb) higher
- Adjusting, see POWER STEERING GEAR (ZF), ADJUSTING
- Steering gear with extra servo assistance only available on vehicles up to 66 kW (90 hp)
- 30 N.m (22 ft lb)
- Lower universal joint
- Cover disc
- Sealing ring
- Always replace
- Union nut
- 30 N.m (22 ft lb)
- Data plate and company initials
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.