A Practical Guide to the Transmission Filter Kit for the 1991-1995 Volvo 940
Keep your classic rear-wheel-drive Volvo shifting smoothly by servicing your automatic transmission correctly.
- Identify your transmission: Most non-turbos use the AW70 and turbos use the stronger AW71, but the filter kits are generally interchangeable.
- Brand quality varies: Stick with reputable brands like Wix or Beck Arnley for a reliable repair; avoid Professional Parts Sweden due to widespread negative reviews.
- Fluid is critical: Using a fluid that meets Dexron II/III specifications is more important than the brand of the filter screen itself.
- Check simple fixes first: Shifting issues can also be caused by a misadjusted kickdown cable or a failed overdrive relay, which are common and simpler to fix.
Is Your Volvo 940's Transmission Acting Up?
The Aisin-Warner automatic transmissions in these cars are known for their durability, but they rely on clean fluid to work properly. A clogged filter or old, worn-out fluid can cause serious problems. Ignoring these symptoms can lead to expensive transmission damage. Look out for these common warning signs.
- Delayed or Harsh Shifting: The car hesitates or slams into gear when shifting.
- Slipping Gears: The engine revs up, but the car doesn't accelerate as it should.
- Failure to Shift into Overdrive: The car won't shift into 4th gear, which can sometimes be caused by a faulty overdrive relay rather than the transmission itself.
- Whining Noise: A whining sound that changes with engine RPM can indicate the transmission pump is being starved of fluid due to a clogged filter.
- No Engagement: The car won't move when you put it in Drive or Reverse, especially after sitting for a long time.
Check the Simple Things First
Before assuming the worst, check two common trouble spots on the Volvo 940. First, ensure the transmission kickdown cable is properly adjusted, as a misadjusted cable can cause poor shifting. Second, check the overdrive relay, as a failure here is common and will prevent the car from using 4th gear.
🎬 See this walkthrough on fixing common Volvo overdrive issues.Choosing the Right Aftermarket Part: Brand Quality Matters
For a simple part like a filter screen and gasket, you don't necessarily need to buy an expensive OEM part. However, quality among aftermarket brands varies significantly. The brands are grouped into tiers based on owner feedback and general industry reputation.
Tier 1: Recommended Brands
These brands are known for quality that often meets or exceeds OEM standards. They are a reliable choice for any repair.
- Wix: A highly respected name in filtration. Wix filters are known for their quality construction and proper fit, making them a top choice for many mechanics and DIYers.
- Beck Arnley: This brand often sources its parts from the original equipment manufacturers. For many Asian-made components like the Aisin-Warner transmission, a Beck Arnley part may be identical to the original, just in a different box.
Tier 2: Standard/Budget Brands
These brands offer a balance of acceptable quality and lower cost. They are a good option for budget-conscious repairs, but may not have the same level of quality control as Tier 1 brands.
- ATP: Often a budget-friendly choice, ATP is a functional option. Some users have noted their fiber pan gaskets are of good quality.
- Pioneer Cable & Premium Guard: These fall into the standard replacement category. While not as well-known as Wix or Beck Arnley, they provide a cost-effective solution.
Avoid: Brands with Poor Reputation
Some brands have a consistent history of poor quality control according to owner forums for Volvo and other Swedish cars.
- Professional Parts Sweden (PPS): Despite the name, numerous owners report issues with PPS parts, calling them "junk" and "cheap stuff of questionable quality." Problems range from premature failure to parts not working right out of the box. It is best to avoid this brand for critical components.
Pro Tip: The Fluid is More Important Than the Filter Brand
The filter in these transmissions is a simple screen. While a quality gasket is important to prevent leaks, the most critical part of the service is using the correct type and amount of new 🎬 Watch: How to properly check your transmission fluid level. automatic transmission fluid (ATF). Your 940 requires a fluid that meets Dexron II/III specifications. Many modern fluids, like Valvoline MaxLife ATF, are compatible and work well.
Cost of Replacing Your Transmission Filter Kit
| Part/Service | Estimated Cost |
|---|---|
| New OEM Filter Kit | $50 - $85 |
| New Aftermarket Filter Kit | $10.75 - $48.67 |
| Shop Labor | $150 - $300 |
Frequently Asked Questions
How do I know if I have an AW70 or AW71 transmission?
Generally, non-turbo Volvo 940s were equipped with the AW70, while turbocharged models received the heavy-duty AW71. However, some later model non-turbo cars also came with the AW71. The filter kit is typically the same for both, but it's always best to confirm with your vehicle's specific details when ordering.
Can I just change the fluid without changing the filter?
You can, but it's not recommended. The service requires dropping the transmission pan to access the filter, which is the only way to clean out sludge and inspect the magnets in the bottom of the pan for signs of excessive wear. Since the pan gasket should be replaced anytime the pan is removed, it makes sense to replace the filter at the same time.
How often should I change my transmission filter and fluid?
A good interval for these vehicles is every 30,000 to 50,000 miles, especially if you frequently drive in stop-and-go traffic or tow. Regular service is the best way to ensure a long life for your transmission.
Is this a difficult job to do myself?
For a DIY mechanic with some experience, this is a very manageable job. The process involves draining the fluid, carefully removing the oil pan bolts, replacing the filter and gasket, and refilling with the correct amount of fluid. 🎬 Watch: Step-by-step guide to a Volvo 940 transmission flush. The most common problem is the nut for the dipstick tube seizing to the pan, which can be tricky to remove without causing damage.
Helpful Videos
Technical Specifications
OEM Part Numbers: 1239932
Kit includes transmission filter (screen) and pan gasket. Compatible with Aisin-Warner AW70, AW71, and AW72L automatic transmissions.
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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.
- Volvo 940: