Transmission Filter Kit Guide for the 2007-2010 Leisure Travel Freedom II
Keep your Freedom II shifting smoothly by choosing the right transmission filter kit for your specific chassis.
- You must first identify if your Freedom II is the Chevrolet-based 'Libero' or the Mercedes-based 'Serenity' to get the correct kit.
- For Serenity (Sprinter) models, always use fluid meeting the MB 236.14 spec and replace the 13-pin electrical connector seal during the service.
- For Libero (Chevy) models, consider reusing the high-quality original pan gasket instead of a lower-quality one from an aftermarket kit.
- A clogged filter can cause serious transmission damage; watch for symptoms like harsh shifting or new whining noises.
Before You Buy: Identify Your Chassis
The most important step is to know which version of the Freedom II you own. From 2007 to 2010, Leisure Travel built this RV on two different platforms. They use completely different engines and transmissions, so the transmission filter kits are not interchangeable. Check your original vehicle documents or look for badging on your RV.
- Freedom II Libero: Built on a Chevrolet Express 3500 chassis with a 6.0L V8 gas engine.
- Freedom II Serenity: Built on a Mercedes-Benz or Freightliner Sprinter 3500 chassis with a diesel engine.
For the Freedom II Libero (Chevrolet Express 3500 Chassis)
If you have the Libero model, your RV has the General Motors 4L80E 4-speed automatic transmission. This is a heavy-duty, reliable transmission found in many GM trucks and vans. Service parts are widely available and affordable.
Choosing an Aftermarket Kit
For the 4L80E, aftermarket filter kits are a cost-effective choice and perform well for normal use. Brands like Premium Guard offer kits that meet or exceed original equipment (OE) specifications. A standard kit includes the filter and a new pan gasket. Some kits may also include a new filter seal. The original reusable metal/rubber gasket is often higher quality than the cork or paper gaskets included in some cheap kits, so inspect your original gasket and consider reusing it if it's in good condition.
For the Freedom II Serenity (Mercedes-Benz Sprinter 3500 Chassis)
If you own the Serenity model, your RV is equipped with a Mercedes-Benz 722.6 (also known as NAG1) 5-speed automatic transmission. This is a sophisticated transmission that requires specific parts and fluid.
Choosing an Aftermarket Kit
Aftermarket kits from quality brands are available and offer good value. A complete kit for the 722.6 transmission should include the filter, pan gasket, and a new drain plug washer.
Critical Pro-Tip: One of the most common failure points on this transmission is the 13-pin electrical connector's O-rings. They become brittle and leak fluid, which can travel up the wiring harness and destroy the expensive Transmission Control Module (TCM). It is highly recommended that you replace this connector every time you service the filter. It is an inexpensive part that can save you from a very costly repair.
Fluid is Key
You MUST use a transmission fluid that meets the MB 236.14 specification. Using standard, generic ATF will cause poor shifting and can quickly damage the transmission. Always check the bottle to ensure it lists this specific approval.
Known Issues, TSBs, and Recalls
During our research for the 2007-2010 model years, no transmission-specific recalls, or Technical Service Bulletins (TSBs) directly related to the filter were found for either the Chevrolet Express 3500 or the Sprinter 3500 chassis. Recalls for these vehicles concerned other areas, such as HVAC controls or generator regulators on the Chevrolet chassis and emergency exit windows on the Sprinter chassis.
Frequently Asked Questions (FAQ)
How often should I change my transmission filter?
For a heavy vehicle like an RV, a good interval is every 30,000 to 40,000 miles for the Chevrolet chassis. For the Sprinter chassis, following a 40,000 to 60,000-mile interval is a common recommendation to ensure longevity, even though some sources had different initial recommendations. Frequent use in mountains or hot climates may require more frequent changes.
Is this a DIY job?
For an experienced DIY mechanic, yes. It involves safely raising the vehicle, draining the fluid, dropping the transmission pan, replacing parts, and refilling with the correct amount of fluid. It can be messy. The Sprinter model is slightly more complex as it requires a special dipstick tool to check the fluid level, as it does not have one from the factory.
What's the difference between OEM and Aftermarket?
OEM (Original Equipment Manufacturer) parts are what the vehicle was built with. For the 4L80E and 722.6, quality aftermarket brands like Premium Guard provide a reliable alternative at a lower cost. The key is to use a reputable brand. For the Sprinter, while an aftermarket filter is fine, using genuine Mercedes-Benz fluid or a licensed equivalent meeting the MB 236.14 spec is highly advised.
My Libero (Chevy) kit came with a cork gasket. Should I use it?
The original GM gasket is a multi-use rubber gasket on a metal frame, which is superior to most aftermarket cork or paper gaskets. If your original gasket is not damaged, many mechanics prefer to clean and reuse it for a better seal.
Technical Specifications
OEM Part Numbers: 1402770095 8675545
Kit components vary by chassis. Chevrolet (Libero) uses a 4L80E transmission filter. Mercedes-Benz (Serenity) uses a 722.6/NAG1 transmission filter.
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.
- Leisure Travel Freedom II:
- 🛍️ Shop This Part
- Before You Buy: Identify Your Chassis
- For the Freedom II Libero (Chevrolet Express 3500 Chassis)
- Choosing an Aftermarket Kit
- For the Freedom II Serenity (Mercedes-Benz Sprinter 3500 Chassis)
- Choosing an Aftermarket Kit
- Fluid is Key
- Known Issues, TSBs, and Recalls
- How often should I change my transmission filter?
- Is this a DIY job?
- What's the difference between OEM and Aftermarket?
- My Libero (Chevy) kit came with a cork gasket. Should I use it?
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