Allison Transmissions, a well-known manufacturer of automatic transmissions, has a stellar reputation for producing reliable and durable products, especially in the commercial and heavy-duty vehicle sectors. However, like any mechanical component, Allison Transmissions are not immune to issues over time. In this blog post, we’ll explore some common problems that vehicle owners in Sparta, IL and fleet managers may encounter with an Allison Transmission.
Fluid Leaks
Transmission fluid leaks are a common issue in many automatic transmissions, including those from Allison. These leaks can occur due to worn seals, gaskets, or damaged components. It’s essential to address fluid leaks promptly, as low fluid levels can lead to overheating, poor shifting performance, and ultimately, transmission damage.
Erratic Shifting
Erratic shifting is a frustrating issue that some Allison Transmissions may experience. This can manifest as harsh, delayed, or unpredictable gear changes. The causes can vary, including electronic control module issues, solenoid problems, or a need for a fluid and filter change. Timely maintenance and diagnostic checks can often resolve erratic shifting problems.
Overheating Transmission
Transmission overheating is a significant concern for any vehicle with an automatic transmission, and Allison Transmissions are no exception. Overheating can result from various factors, such as excessive load, towing heavy trailers, or inadequate transmission cooling. When an Allison Transmission overheats, it can cause fluid breakdown and lead to significant damage.
Electronic Control Module (ECM) Problems
Modern Allison Transmissions are equipped with advanced electronic control modules to ensure precise shifting and performance. Issues with the ECM can result in various problems, including error codes, stalling, and shifting anomalies. Regular diagnostic checks and software updates are essential to maintain proper ECM functionality.
Torque Converter Lockup Issues
Torque converter lockup problems can affect fuel efficiency and overall performance. When the torque converter fails to lock up as it should, the engine may not operate optimally, leading to decreased mileage and increased heat generation. Addressing torque converter issues promptly can help maintain fuel efficiency and reduce the risk of further problems.
Delayed Engagement
Delayed engagement occurs when there’s a noticeable delay between shifting into gear and the transmission engaging. This can be frustrating and potentially dangerous, especially in situations that require immediate acceleration. The causes can range from low fluid levels to internal wear, and diagnosis is crucial to determine the root cause.
Transmission Maintenance Neglect
One of the most common issues with Allison Transmissions is not a fault of the part itself but rather a result of maintenance neglect. Regular servicing near Sparta, IL, including fluid and filter changes at recommended intervals, is essential to keep things operating smoothly. Failure to maintain the transmission can lead to premature wear and costly repairs.
Faulty Solenoids
Solenoids play a vital role in controlling the flow of transmission fluid and determining gear engagement. When solenoids fail, it can result in shifting problems, erratic behavior, and warning lights on the dashboard. Replacing faulty solenoids is a common repair for Allison Transmissions.
Need someone near the Sparta, IL area to have a look at the Allison transmission in your vehicle? Contact Marshall’s Transmission Service for more information on services!
