Automatic Gearbox Easy Change Kit with Metal Sump, Filter, Liqui Moly ATF and Wiring Sleeve 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”, however in real-world use transmission fluid gradually degrades due to heat cycles and mileage.

As the fluid deteriorates it loses lubrication properties and can lead to torque converter judder, slipping between gears, delayed engagement and harsh gear changes. Regular servicing helps maintain smooth gearbox performance and prolong transmission life.

This comprehensive gearbox service kit includes a metal easy-change sump conversion, high quality Liqui Moly Top Tec 1800 automatic transmission fluid and a replacement gearbox wiring sleeve. The wiring sleeve is a known leak point on ZF 6HP26 gearboxes, so replacing it during servicing helps prevent fluid leaks and electrical connection issues.

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

Common symptoms of degraded gearbox fluid

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

If your Range Rover is experiencing any of these symptoms, servicing the gearbox fluid and filter can often restore smoother transmission 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
• ZF gearbox wiring sleeve

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. Replace the gearbox wiring sleeve.
6. Fit the new metal sump pan using the supplied gasket and bolts.
7. Refill the transmission following the correct ZF gearbox filling procedure.

Vehicle compatibility

Range Rover (L322) 2006-2012
Models fitted with the ZF 6HP26 6-speed automatic gearbox

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