Automatic Gearbox Easy Change Filter Kit with Liqui Moly Top Tec 1800 ATF for Range Rover L322

The ZF 6HP26 6-speed automatic gearbox fitted to later Range Rover L322 models was originally described as “sealed for life”. In real-world driving conditions however, transmission fluid gradually degrades with mileage and heat cycles, which can lead to reduced lubrication and declining gearbox performance.

Old or contaminated transmission fluid can cause symptoms such as torque converter judder, slipping between gears, delayed engagement and harsh shifting. Regular servicing helps maintain smooth gearbox operation and prolongs transmission life.

This premium gearbox service kit includes a metal easy-change sump conversion and high quality Liqui Moly Top Tec 1800 automatic transmission fluid, allowing a proper transmission service without the complex process normally required to replace the original integrated plastic sump filter.

The factory gearbox sump incorporates the filter, meaning replacement normally requires lifting the engine and removing surrounding components. This easy-change conversion kit replaces the original plastic sump with a durable metal pan and separate replaceable filter, making future gearbox servicing much quicker and easier.

Common symptoms of degraded automatic gearbox fluid

• Torque converter shudder or vibration during light acceleration
• Harsh or delayed gear changes
• Gear slipping or hesitation
• Noisy transmission operation
• Poor shift quality when cold or hot

If your Range Rover is experiencing any of these symptoms, servicing the gearbox fluid and filter can often restore smoother operation.

Kit contents

• Easy-change metal transmission sump pan
• Separate replaceable gearbox filter
• Gearbox sump gasket
• Complete set of replacement sump bolts
• 7 litres Liqui Moly Top Tec 1800 automatic transmission fluid

The 7 litres of ATF included allows a double drain and refill process, helping replace a greater percentage of the old fluid during servicing.

Easy-change sump conversion process

1. Drain the transmission fluid and remove the sump bolts.
2. Carefully cut the plastic filter neck on the original sump.
3. Remove the original plastic sump pan.
4. Install the new separate filter.
5. Fit the new metal sump pan using the supplied gasket and bolts.
6. Refill the transmission following the correct ZF gearbox filling procedure.

Vehicle compatibility

Range Rover L322
ZF 6HP26 6-speed automatic gearbox only

This kit is not suitable for vehicles fitted with the earlier 5-speed automatic gearbox or later 8-speed automatic transmissions.