A Guide to Transmission Filter Kits for the 2005-2015 IC Corporation CE Integrated
Keep your bus's Allison transmission shifting smoothly by understanding your filter options.
- Your bus most likely has an Allison transmission that uses an external spin-on filter, part number 29539579 or equivalent.
- When changing the filter, you must clean and reuse the circular magnet that sits between the filter and the transmission housing.
- A clogged filter can cause serious symptoms, including harsh shifting and warning lights with codes like P0841 or P088A.
- The genuine Allison OEM filter is high-quality and often cheaper than aftermarket options, making it a recommended choice.
Is it time to change your transmission filter?
For the Allison transmissions in your IC Bus, a key service item is the external spin-on filter. A dirty or clogged filter can lead to serious transmission problems. Ignoring this simple maintenance can cause poor shifting, and in severe cases, lead to expensive transmission damage. Regularly changing your filter is cheap insurance for a major component of your vehicle.
Symptoms of a Clogged Transmission Filter
Your bus may give you signs that the transmission filter needs attention. If you experience any of the following, it's time to inspect your transmission system.
- Rough or Delayed Shifting: The transmission may hesitate or shift harshly between gears.
- Unusual Noises: A whining or buzzing sound from the transmission area can indicate a struggle for fluid flow.
- Warning Lights: A 'Check Trans' or similar warning light may appear on your dashboard. Some systems may even display a specific 'filter change' message.
- Leaking Fluid: While not directly a filter symptom, it's a reason to inspect the whole system. Sometimes, a filter can be damaged or installed incorrectly, causing leaks.
Recalls and Service Bulletins
As of early 2026, there are no widespread recalls or technical service bulletins (TSBs) directly related to the transmission filters on the 2005-2015 IC Corporation CE Integrated models. Recalls for the CE series have focused on newer model years and other components like air brakes or engine control modules.
Choosing an Aftermarket Transmission Filter Kit
When shopping for a new filter, you'll find several brands available. The most common part for this bus is an external spin-on filter for the Allison 1000, 2000, or 3000 series transmission. Here’s an honest look at the available brands and how they compare.
OEM vs. Aftermarket Quality
For this specific part, the original equipment (OEM) Allison filter is considered high quality and is surprisingly affordable. Aftermarket brands offer a range of quality, from basic replacements to premium options that meet or exceed OEM standards. For a hard-working vehicle like a bus, using a quality filter is critical.
- Premium Brands (Wix): Wix is a well-respected brand known for making high-quality filters for heavy-duty applications. Their products often feature robust construction and are trusted by professionals. If you prefer a top-tier aftermarket option, Wix is a solid choice.
- Standard Brands (Premium Guard): Premium Guard aims to meet OEM specifications. Reviews suggest they are generally a decent mid-grade option, though quality can sometimes be inconsistent compared to premium brands.
- Economy Brands (ATP): ATP offers a budget-friendly alternative. They are known for their 'third-hand' gaskets that can make installation easier. However, some users report that the included gaskets are not as high-quality as OEM and can be damaged in the packaging.
Pro Tip: Don't Forget the Magnet!
Allison transmissions use a round magnet that sits on the transmission where the filter screws on. This magnet traps metallic debris. When you change the filter, you MUST clean this magnet and put it back. It sometimes sticks to the old filter, so be careful not to throw it away by accident.
Cost of Transmission Filter Kits (2005-2015 IC Corporation CE Integrated)
The cost can vary depending on the brand and what's included in the kit. The main part you need for a routine service is the external spin-on filter.
| Part Type | Estimated Cost |
|---|---|
| New OEM (Allison Spin-on Filter) | $14 - $25 |
| New Aftermarket (Spin-on Filter Kit) | $38 - $133 |
| Shop Labor | $100 - $150 |
Frequently Asked Questions
How often should I change the transmission filter?
For the external spin-on filter on an Allison transmission, a common recommendation is to change it every 10,000 to 15,000 miles, or as specified in your vehicle's service manual. Some operators do it with every other engine oil change.
Do I need to change the internal filter too?
No, not for routine service. The Allison 1000/2000/3000 series transmissions have an internal filter or screen, but it is only meant to be serviced during a major transmission overhaul. Your regular service only involves the external spin-on filter.
What transmission fluid should I use?
Always use a fluid that meets Allison's specifications, such as a TES 668™ or TES 295® approved fluid. Using the wrong fluid can cause shifting problems and damage the transmission. You will only lose about a quart of fluid when changing the spin-on filter.
Is a new gasket included in the kit?
The external spin-on filter has its own built-in rubber seal, just like an engine oil filter. Aftermarket kits from brands like ATP or Premium Guard may also include a large pan gasket, but you will not need this for a simple spin-on filter change.
Technical Specifications
OEM Part Numbers: 29539579
External spin-on filter for Allison 1000, 2000, and 3000 series 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.
- IC Corporation CE Integrated:
- 🛍️ Shop This Part
- Is it time to change your transmission filter?
- Symptoms of a Clogged Transmission Filter
- Recalls and Service Bulletins
- Choosing an Aftermarket Transmission Filter Kit
- OEM vs. Aftermarket Quality
- Pro Tip: Don't Forget the Magnet!
- Cost of Transmission Filter Kits (2005-2015 IC Corporation CE Integrated)
- Frequently Asked Questions
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