Understanding Transmission Service for the 2023-2024 Thor Motor Coach Twist
Your Twist's Ram ProMaster transmission has specific needs that differ from many other vehicles.
- The transmission filter in your 2023-2024 Twist is internal and cannot be replaced during normal service.
- Focus on changing the transmission fluid every 60,000 miles to ensure longevity.
- Always use the specific Mopar ZF 9-Speed transmission fluid or an approved equivalent.
- Do not buy aftermarket filter kits, as they are for older models and will not fit your vehicle.
Understanding Your Twist's Drivetrain
When considering maintenance for your 2023-2024 Thor Motor Coach Twist, it's essential to know it's built upon the Ram ProMaster 3500 platform. This means its engine and transmission are the same as the ProMaster's. For these model years, the van is equipped with a TorqueFlite 9-speed automatic transmission, also known as the 948TE. This modern transmission requires a specific approach to service.
The Transmission Filter is Not a Serviceable Part
A critical point for owners to understand is that the transmission filter in the 9-speed 948TE is located deep inside the transmission housing. 🎬 See why this internal filter is so difficult to access It cannot be accessed or replaced by simply removing the transmission pan. Replacing this filter requires the complete removal and disassembly of the transmission by a qualified technician. Therefore, you will not find aftermarket transmission filter kits from brands like Wix or Premium Guard that fit your 2023-2024 model for a routine service. Any kits you see advertised are for the older 6-speed (62TE) transmission used in ProMaster vans up to the 2021 model year.
What Does a Transmission Service Involve?
Since the filter is not replaceable, a "transmission service" for your Twist consists of a fluid change. This is commonly called a "drain and fill" 🎬 Watch: Step-by-step drain and fill for the 9-speed transmission or a "fluid exchange." Mechanics recommend this service approximately every 60,000 miles for vehicles under heavy use, which includes most RVs. This process removes old, broken-down fluid and replaces it with fresh fluid that meets Mopar's specifications, ensuring the transmission stays properly lubricated and cooled.
Pro Tip: Don't believe the myth of "lifetime" fluid. While the fluid is long-lasting, the heavy loads and varied conditions of RV use cause it to break down over time. Regular fluid changes are the single best thing you can do to prolong the life of your transmission.
Choosing the Right Service
When it's time for a transmission service, you have two main options: the dealership or a trusted independent repair shop.
- OEM/Dealership Service: The dealer will use the exact Mopar-branded fluid specified for your transmission. Technicians are factory-trained on the specific procedures for the 948TE transmission. This is often the most expensive but most reliable option.
- Independent Shop Service: A reputable independent mechanic can also perform a fluid service. It is crucial to ensure they use a fluid that explicitly meets the Mopar ZF 8&9 Speed ATF specification. Using the wrong fluid can cause shifting problems and even permanent damage.
Known Issues, Recalls, and TSBs
While the previous generation ProMaster (pre-2022) had significant transmission recalls related to rollaway risks, the 2023-2024 models with the 9-speed transmission have not been subject to the same issues. As of early 2026, there are no major recalls or Technical Service Bulletins (TSBs) related to the internal transmission filter or widespread mechanical failure on the 948TE transmission in these vans.
Frequently Asked Questions
Can I replace the transmission filter on my 2023-2024 Twist myself?
No. The filter is an internal component that requires complete transmission disassembly to access. This is not a DIY-friendly job.
How often should I get my transmission fluid changed?
For a heavy vehicle like an RV, a good interval is every 60,000 miles. This helps remove contaminants and replenish the fluid's protective qualities.
What happens if I don't change the transmission fluid?
Old fluid loses its ability to lubricate and cool effectively. This leads to increased wear on internal parts, which can cause overheating, poor shifting, and eventually, a complete transmission failure that costs thousands of dollars to repair.
Why do I see transmission filter kits for sale for the ProMaster?
Those kits are for the older 6-speed (62TE) transmission used in ProMaster vans made before the 2022 model year. 🎬 Watch: How to service the older 6-speed 62TE transmission They will not fit your 2023 or 2024 model.
Helpful Videos
Technical Specifications
Transmission Type: 948TE / TorqueFlite 9-Speed Automatic
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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.
- Thor Motor Coach Twist: