The 6T75 transmission, commonly found in GM vehicles, is known for experiencing shuddering issues, particularly between 2015 and 2019 model years. This shudder, often felt as a vibration or shaking, typically occurs during light acceleration or while the torque converter clutch (TCC) is engaged. Understanding the causes of this shudder and exploring effective solutions can save vehicle owners significant time and money.
Understanding the Root Cause of 6T75 Shudder
General Motors has issued several Technical Service Bulletins (TSBs) addressing torque converter clutch shudder in their 6- and 8-speed transmissions, including the 6T75. While mechanical issues can contribute to shudder, a primary factor is often additive depletion in the automatic transmission fluid (ATF).
Over time, the essential additives in ATF, responsible for friction modification and wear protection, degrade. This depletion can lead to inconsistent clutch slip rates, resulting in the shuddering sensation. GM’s own TSB #20-NA-142 acknowledges additive depletion as a culprit behind shudder and surging.
“Fill-for-life” fluid claims further exacerbate the problem. No fluid truly lasts the lifetime of a vehicle. Driving conditions, temperature fluctuations, and individual driving habits all contribute to ATF degradation. Ignoring this reality often leads to premature wear and performance issues like shudder.
Addressing 6T75 Transmission Shudder: Beyond Fluid Flushes
GM’s recommended solution for shudder often involves extensive ATF flushes, requiring a significant quantity of expensive fluid. While this approach can sometimes alleviate the issue, it doesn’t always provide a lasting fix and can be costly.
A more economical and potentially effective solution involves addressing the root cause: additive depletion. Supplementing the ATF with a high-quality additive package can restore crucial friction modifiers and other depleted components.
Lubegard Platinum ATF Protectant: A Potential Solution
Lubegard Platinum ATF Protectant is specifically designed to combat additive depletion in automatic transmission fluid. Its proprietary formula, featuring Synergol TMS, enhances oxidative stability, reduces wear, and addresses low-speed frictional problems like TCC shudder.
Independent testing has demonstrated Lubegard Platinum’s ability to eliminate shudder and reduce slippage in GM transmissions. It also improves shift quality and overall transmission performance.
Adding Lubegard Platinum to the existing ATF offers a less expensive alternative to complete fluid flushes. Two bottles of Lubegard Platinum often cost significantly less than the 20 quarts of OEM fluid typically required for a flush.
Conclusion: A Proactive Approach to 6T75 Transmission Health
6t75 Transmission Shudder can be a frustrating and costly problem. While complete fluid flushes are sometimes necessary, addressing additive depletion with a product like Lubegard Platinum ATF Protectant offers a potentially more economical and effective solution. By proactively maintaining ATF health, vehicle owners can extend the life of their transmissions and avoid expensive repairs. For more information on Lubegard products, visit www.Lubegard.com.
