A Guide to the Transmission Filter Kit for the 2005-2006 Pontiac G4
Keep your G4's automatic transmission shifting reliably by understanding and replacing its filter kit.
- Your G4 uses a 4T45-E transmission; a clogged filter can cause shifting problems, noises, and leaks.
- Replacing the filter and fluid every 30,000-60,000 miles is critical preventative maintenance.
- Quality aftermarket brands like Wix offer a reliable and cost-effective alternative to OEM parts.
- This is a manageable DIY project, but be prepared for a messy fluid drain.
Is Your Transmission Filter Clogged?
A transmission filter doesn't fail suddenly. Instead, it slowly clogs with debris over thousands of miles. When the filter becomes too restricted, it can no longer supply enough clean fluid to the transmission. This can lead to serious problems. Ignoring these symptoms can turn a simple maintenance job into a major transmission repair.
Common Symptoms of a Failing Transmission Filter:
- Delayed or Rough Shifting: The car may hesitate when you shift from Park to Drive, or shifts may feel harsh and jerky.
- Whining or Rattling Noises: You might hear a whining sound that changes with engine speed, or rattling noises when the car is in neutral.
- Burning Smell: A clogged filter can cause the transmission to run hotter, burning the fluid and creating a distinct burnt smell.
- Fluid Leaks: Increased pressure from a blockage can force fluid out through seals and gaskets, leaving red or brown puddles under your car.
- Slipping Gears: The transmission may feel like it's slipping out of gear or struggling to transfer power to the wheels.
Known Issues for the Pontiac G4 Transmission
While the 4T45-E transmission is generally durable, GM has issued Technical Service Bulletins (TSBs) for some related issues. Owners have reported a harsh 1-2 shift on the first drive of the day, which GM states is a normal characteristic and does not require repair. There is also a special coverage program for a faulty shifter that may prevent you from removing the ignition key. These issues are not caused by the filter but are good to be aware of as a G4 owner.
Choosing the Right Aftermarket Filter Kit
You do not need to buy a transmission filter from the dealer to get a quality part. Reputable aftermarket brands offer excellent performance, often at a better price. The most important factors are correct fitment and a quality gasket to prevent leaks.
Brand Tiers for Your Pontiac G4:
- Premium Aftermarket (Wix): Wix is a well-respected brand known for making high-quality filters that meet or exceed OEM specifications. They are a top choice for owners who want peace of mind and proven reliability.
- Standard Aftermarket (ATP, Premium Guard, Pioneer): These brands provide reliable, budget-friendly options for regular maintenance. They are designed to fit and function like the original part and are a perfectly suitable choice for most drivers. Premium Guard is known for producing a wide range of filters that meet industry standards.
Pro Tip: Change the Fluid, Too
Replacing the transmission filter requires removing the transmission pan, which drains most of the fluid. This is the perfect time to refill the system with fresh, new transmission fluid (DEXRON-VI is specified). Never reuse old transmission fluid, as it breaks down over time and holds contaminants.
Aftermarket Transmission Filter Kit Cost for 2005-2006 Pontiac G4
| Part Type | Price Range |
|---|---|
| New Aftermarket Filter Kit | $35.61 - $50.58 |
| Shop Labor | $100 - $200 |
| Total (Parts + Labor) | $135 - $250+ |
Cost estimates do not include the price of new transmission fluid and may vary by location and shop.
Frequently Asked Questions
How often should I change my G4's transmission filter?
Most manufacturers recommend replacing the transmission filter and fluid every 30,000 to 60,000 miles. If you frequently drive in heavy traffic or tow with your vehicle, consider servicing it closer to the 30,000-mile interval.
Is the transmission filter the same as the engine oil filter?
No, they are completely different parts. The transmission filter is located inside the transmission and is only accessible by removing the bottom pan. The engine oil filter is located on the outside of the engine and is changed during a regular oil change.
Can I replace the transmission filter myself?
Yes, this is a DIY-friendly job if you have some mechanical experience, jack stands, and the right tools. The main challenge is managing the fluid spill when you lower the pan. It can be a messy job, so be prepared with a large drain pan.
What kind of fluid does the 2005-2006 Pontiac G4 transmission use?
Your G4's 4T45-E transmission requires DEXRON-VI automatic transmission fluid. Even if an older manual specifies an earlier version, DEXRON-VI is the current, correct fluid to use.
Technical Specifications
OEM Part Numbers: 24221762
Fits the 4T45-E 4-speed automatic transmission. Kit should include the filter and a new transmission pan gasket.
We Have This Part in Stock
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Pontiac G4: