Allison Transmissions are known for their durability, especially in heavy-duty vehicles like commercial trucks, buses, and industrial machinery. These transmissions are designed to handle demanding workloads and provide exceptional performance over time. However, to ensure they continue operating at their best, regular maintenance is essential. Proper care can help extend the life of your Allison Transmission, prevent costly repairs, and ensure your vehicle operates smoothly for years to come. Below are some of the top maintenance tips for keeping your Allison Transmission in prime condition.
1. Use the Right Transmission Fluid
One of the most important factors in maintaining the longevity of your Allison Transmission is using the correct fluid. Allison recommends specific fluids such as TES-295 or TES-668 certified oils, which are designed to provide the right lubrication and cooling properties for their transmissions.
- Why It Matters: Using the wrong fluid can lead to improper lubrication, overheating, and accelerated wear of internal components, reducing the transmission’s lifespan.
- Tip: Always refer to your vehicle’s owner manual to ensure you’re using the recommended fluid type. When topping up or changing the fluid, only use fluids that meet Allison’s certification standards. e towing, hauling, and off-road operations. You can also have a look at 68rfe transmission.
2. Regular Fluid Level Checks
Maintaining the proper fluid level is essential for the smooth operation of your transmission. Low fluid levels can result in overheating, erratic shifting, and internal damage, while overfilling can cause foaming, leading to poor lubrication and potential system failure.
- Why It Matters: Transmission fluid helps with cooling and lubrication, and without the right level, the transmission can overheat or suffer from friction damage.
- Tip: Check the fluid level regularly, especially after long trips or under heavy loads. Always check the fluid when the vehicle is running and in neutral (for automatic transmissions), ensuring you’re following the manufacturer’s guidelines for the correct fluid level.
3. Change Transmission Fluid and Filter on Schedule
Over time, transmission fluid can become contaminated with particles and debris, affecting its ability to lubricate the transmission efficiently. To avoid premature wear or damage, it’s important to change the fluid and filter at regular intervals.
- Why It Matters: Old fluid loses its effectiveness, and a clogged filter can restrict the flow of fluid, leading to overheating and poor performance.
- Tip: Follow the manufacturer’s recommended fluid change intervals. Typically, Allison Transmissions require fluid changes every 30,000 to 50,000 miles, but it’s essential to adjust this based on your specific usage and conditions (such as towing or heavy loads).
4. Inspect and Clean the Transmission Cooler
Transmission fluid coolers are designed to regulate the temperature of your transmission fluid, preventing overheating. However, over time, they can become clogged with dirt, debris, and other contaminants. Regular inspection and cleaning of the cooler are essential for maintaining proper fluid temperatures.
- Why It Matters: A dirty or clogged cooler can lead to high transmission temperatures, which can cause fluid breakdown, leading to component damage and reduced transmission life.
- Tip: Inspect the transmission cooler regularly, especially after long periods of use or in dusty environments. Clean the cooler if you notice any blockages or buildup.
5. Monitor and Maintain Proper Cooling
Overheating is one of the leading causes of transmission failure. Keeping the transmission at an optimal temperature is crucial for its longevity. This can be achieved by maintaining a properly functioning cooling system, including checking the transmission cooler, cooling fans, and related components.
- Why It Matters: Overheating can cause fluid breakdown, leading to poor performance and potential failure of the transmission.
- Tip: Monitor the temperature gauge regularly while driving, especially during heavy-duty operations. If the transmission temperature is too high, it may be time to inspect the cooling system for issues such as leaks or faulty components.
6. Drive Smoothly and Avoid Hard Shifting
Aggressive driving behaviors, such as hard acceleration, abrupt shifting, or riding the brakes, can put unnecessary strain on your transmission. Allison Transmissions are designed to handle heavy-duty loads, but consistent harsh driving can still lead to faster wear.
- Why It Matters: Excessive stress on the transmission can cause premature damage to internal components such as gears and clutch packs.
- Tip: Try to drive smoothly, especially when starting from a stop or shifting gears. Avoid sudden stops, rapid acceleration, and excessive load hauling, as these actions can lead to overheating and faster wear.
7. Use the Tow/Haul Mode When Needed
If your vehicle is equipped with a Tow/Haul mode, it’s important to use it when towing or carrying heavy loads. This mode adjusts the transmission to operate more efficiently under high-torque conditions, reducing strain on the transmission.
- Why It Matters: When towing or carrying a heavy load, the transmission is under more strain. Tow/Haul mode helps manage the load by adjusting the shift patterns and improving cooling.
- Tip: Always engage Tow/Haul mode when towing, hauling, or operating under heavy-duty conditions. This reduces unnecessary wear on the transmission and ensures smoother shifting.
8. Check and Replace Transmission Mounts
Transmission mounts secure the transmission to the vehicle’s frame. If these mounts become damaged or worn out, they can cause the transmission to shift out of alignment, leading to vibrations and even misalignment of the drivetrain.
- Why It Matters: Worn-out transmission mounts can cause the transmission to move excessively, leading to premature wear and potential damage.
- Tip: Check the transmission mounts periodically for cracks or signs of wear. If the mounts are damaged, replace them promptly to avoid damage to the transmission.
9. Listen for Unusual Noises
Allison Transmissions are designed for quiet operation. If you hear unusual noises, such as whining, grinding, or clunking sounds, this may indicate a problem with the transmission.
- Why It Matters: Strange noises can be a sign of internal wear, low fluid levels, or mechanical failure that could lead to a more serious issue if left unaddressed.
- Tip: If you notice any unusual sounds, it’s crucial to have your transmission inspected by a professional mechanic as soon as possible. Early detection can prevent more extensive and costly repairs.
10. Get Regular Professional Inspections
Regular professional inspections are an essential part of proactive transmission maintenance. A trained technician can identify potential issues before they develop into major problems, saving you from expensive repairs or replacements.
- Why It Matters: Some issues, like internal wear or leaks, may not be immediately noticeable but can affect the transmission’s performance.
- Tip: Schedule annual or semi-annual inspections with a qualified technician who specializes in Allison Transmissions. This will help you identify minor issues early on and prevent costly repairs down the road.
Conclusion
Allison Transmissions are built to last, but they require regular maintenance to ensure they continue to perform optimally. By following these top maintenance tips — such as using the right fluid, checking fluid levels, maintaining the cooling system, and driving responsibly — you can extend the life of your Allison Transmission and avoid costly repairs. Regular care and attention to detail will keep your transmission running smoothly and efficiently for many years, no matter how heavy the load or challenging the terrain.