AL4 DP0 Piston Kit

The AL4 DP0 Piston Kit is a genuine OEM seven-piece transmission piston set designed for professional automatic transmission rebuilding and repair. The kit shown contains seven molded transmission pistons and related piston components for selected AL4 and DP0 four-speed automatic transmissions. These pistons operate within the hydraulic clutch and brake circuits and are important for maintaining correct hydraulic pressure and clutch application.

This OEM piston kit is intended for transmission rebuilders, automatic transmission repair workshops, distributors and wholesale customers. The AL4 and DP0 transmission family was used in a wide range of Renault, Peugeot and Citroen applications. Because internal configurations and piston specifications can vary, technicians should always verify the transmission code, original part number and piston configuration before ordering.

AL4 DP0 Seven-Piece Piston Kit

The AL4 DP0 Piston Kit contains seven piston components used in the hydraulic control and clutch application system. Specialist transmission catalogs identify a seven-piece configuration containing E1, E2, F1, F2 and F3 piston components together with the corresponding piston covers or retainers. These components work together to transfer hydraulic pressure into mechanical movement inside the transmission.

The seven-piece configuration is different from the five-piece AL4/DP0 piston kit that excludes the servo or brake-band pistons. Published transmission parts information identifies the seven-piece OEM configuration as 11 27 GK072 1001, while 11 27 GK072 0001 is listed for the five-piece version. The correct configuration should therefore be selected according to the transmission being rebuilt.

Genuine OEM Transmission Pistons

Using genuine OEM pistons is important when rebuilding an AL4 or DP0 transmission because piston dimensions, sealing geometry and molded materials directly affect hydraulic operation. Each piston must maintain an effective seal while moving smoothly inside its corresponding bore.

The components in the kit should be inspected before installation to ensure that the sealing surfaces and piston bodies are clean and undamaged. Technicians should also inspect the related piston bores, return springs, clutch drums and hydraulic passages during an overhaul.

A correctly matched piston set helps the rebuilt transmission maintain the intended hydraulic pressure and clutch engagement characteristics.

AL4 Transmission Repair Application

The AL4 is a four-speed front-wheel-drive automatic transmission widely associated with Peugeot and Citroen vehicles, while DP0 is the closely related Renault designation. Applications include a broad range of passenger vehicles from Renault, Peugeot and Citroen, with fitment depending on vehicle model, engine, production year and transmission version.

During transmission rebuilding, worn molded pistons may contribute to hydraulic leakage, delayed clutch application, slipping or abnormal transmission operation. Replacing damaged piston components can therefore be an important part of a comprehensive overhaul.

The technician should compare the original piston arrangement with the replacement kit before assembly. Particular attention should be given to piston diameter, sealing lip orientation and the location of each component.

Professional DP0 AL4 Rebuilding

The AL4 DP0 Piston Kit is suitable for complete transmission rebuilds as well as repairs involving damaged or aged molded pistons. Before assembly, all related components should be thoroughly cleaned and inspected.

Technicians should follow the appropriate transmission service procedure when installing the pistons. Sealing surfaces should be protected during installation, and excessive force should be avoided because molded piston lips can be damaged if installed incorrectly.

The piston kit can be combined with an AL4/DP0 overhaul kit, friction kit, steel plate kit, filter and other repair components when carrying out a complete transmission rebuild.

Seven-Piece OEM Configuration

The seven-piece AL4 DP0 configuration is particularly useful for rebuilders who require both the main clutch pistons and the additional servo or brake-related piston components. Specialist catalog listings identify the seven-piece kit for AL4 and DP0 applications from the late 1990s onward.

However, not every AL4 or DP0 transmission should automatically receive the same piston set. Production changes and application differences can affect the required components. Customers should provide the transmission identification or original piston photos when the application is uncertain.