The Automatic Transmission Oil Strainer (also known as a Transmission Filter) is a critical component in modern automatic gearboxes. It ensures clean fluid circulation by trapping contaminants such as metal particles, sludge, and debris, thereby protecting sensitive transmission components (e.g., valves, clutches) from wear and damage. Regular replacement of the strainer is essential to maintain optimal transmission performance and longevity.

Key Functions

Filtration: Removes abrasive particles from transmission fluid.

Pressure Regulation: Maintains stable fluid flow to prevent pressure drops.

Component Protection: Extends the lifespan of gears, torque converters, and solenoids.

Types of Transmission Filters

Inline/Magnetic Filters: Often used in Toyota and Honda transmissions.

Pan Filters: Common in Mercedes-Benz and BMW models (integrated with the transmission pan).

Cartridge Filters: Found in newer ZF (e.g., 8HP/9HP) or Aisin transmissions.

OEM Reference Numbers

Below are common OEM part numbers for popular brands:

1. Mercedes-Benz

A 001 277 00 01: For 7G-Tronic (722.9) transmissions (e.g., E-Class, S-Class).

A 000 277 02 00: For 5G-Tronic (722.6) models (ML, GL series).

2. BMW

24 30 8 641 243: ZF 6HP/8HP transmission filter (5/7 Series, X5).

24 11 6 855 006: GM 6L45/6L50 transmission filter (3 Series, X3).

3. Toyota/Lexus

35330-31010: For Aisin Warner AW series (Camry, RAV4).

35330-50010: U660E/U760E transmissions (Highlander, Lexus ES).

4. General Motors (GM)

GM 24236936: For 6L80/6L90 transmissions (Chevrolet Silverado, Cadillac Escalade).

5. Ford

FT-178: 6R80 transmission filter (F-150, Mustang).

Maintenance Tips

Replacement Interval: Every 30,000–60,000 miles (or 2–4 years), depending on driving conditions.

Use OEM or Certified Aftermarket Filters: Non-genuine filters may compromise filtration efficiency.

Fluid Replacement: Always replace transmission fluid when changing the filter.

Compatibility Notes

Ensure the filter matches the transmission model (e.g., ZF, Aisin, GM).

Cross-check part numbers using platforms like OEMCat or consult dealership databases.