O-ring Pump housing - Aisin AW50-40 / AW55-50

A large O-ring sealing the joint between the oil pump body and the main gearbox housing. It is used on the company's very popular 4- and 5-speed automatic transmissions Aisin Warnerincluding in models AW50-40LE (AF20/AF22) and AW55-50SN. Its damage or hardening with age leads to serious internal pressure leaks, preventing the gearbox from working properly.

Technical specifications:

• Manufacturer: High-quality replacement
• Condition: New
• Transmission type: Automatic 4/5-speed (AW50-40, AW55-50)
• Application: Oil pump circuit seal

Vehicle compatibility:

The O-ring fits a huge number of vehicles, including:

• WITH AW50-40: Opel Astra F, Vectra A/B, Calibra; Saab 900; Volvo 850
• WITH AW55-50: Volvo S60/S80/XC90; Saab 9-3/9-5; Opel Vectra C/Signum; Renault Laguna/Espace; Nissan Maxima

Key benefits:

• Restores a key seal in the main hydraulic circuit
• Prevents pressure loss, which is the cause of many failures, e.g. clutch slippage
• Necessary to be replaced each time the oil pump is removed during an overhaul
• Made of ageing and ATF oil-resistant material

Installation instructions:

Replacing the o-ring requires disassembly of the gearbox and removal of the oil pump. The old o-ring must be removed and the groove in the transmission body thoroughly cleaned. The new o-ring should be gently lubricated with clean ATF oil or assembly grease and carefully seated in the groove before reinstalling the pump.

Summary:

The oil pump O-ring for Aisin transmissions is a small and inexpensive part, but its role is absolutely fundamental to the operation of the entire transmission. Its preventive replacement during every overhaul is a must to guarantee the success of the repair and prevent serious pressure problems.