![]() ![]() LUBEGARD also restores depleted anti-wear additives and friction modifiers to an additive consumed/inadequate ATF. LUBEGARD PLATINUM ATF Protectant came into existence as LUBEGARD’s premium formula designed specifically for extending the life of transmission fluid by improving oxidative stability, reducing component wear and preventing low-speed frictional problems like TCC shudder. Since 1984 LUBEGARD has been developing solutions for additive depletion issues in ATF. that are vital to the performance and functionality of transmissions. There isn’t a “magic bottle” that will bring a worn-out fluid back from the dead however, there are ways to extend the life of the fluid and prevent premature fluid breakdown by restoring the additive content such as friction modifiers, defoamer, anti-wear additives etc. There are many factors contributing to the fluid breakdown, i.e., driving conditions, temperature, driving habits, etc. There is no such thing as a fill-for-life fluid. Fill-For-Life fluid, or extended fluid change intervals, have added to this problem. As you may have noticed, automatic transmissions as well as CVT and DCT units have frictional durability and other performance problems caused by additive depletion in fluids. TCC shudder and “fill-for-life fluids” are certainly not strictly a GM issue. Per the TSB: “this condition may be caused by additives in the transmission fluid that may have been depleted during vehicle operation–some of these additives assisted with regulating a consistent slip rate of the clutches.” ![]() It is certainly not a new problem, but the acknowledgment of the actual cause of the problem is a first for GM. It is ironic to us that the problem was finally recognized by the OEM and called by the name we originally gave it over 30 years ago: “additive depletion.” In their recent TSB (#20-NA-142) published in May 2022, which is titled “Complaint: “Shudder/surging while driving”, additive depletion is called out as the culprit. It is a problem we at LUBEGARD have been aware of since our founding and has been the focus of our research and development as a company that specializes in tribology. In May 2022 GM finally concluded that the transmission fluids they have used and relied on for extended warranties for the last 30 years have a major problem. OEMs complicated it by calling the fluid “fill for life,” another bit of questionable advice to owners who are unaware that their driving habits, not the mileage, would determine service frequency. There are plenty of programing, mechanical and wear problems that can cause the same unwanted shudder or surging however, the biggest source of the problem was and continues to be the result of additive depleted ATF. Because the 6- and 8-speed units were based on the same design and engineering, it was not a surprise that they have remarkably similar problems such as slippage, shudder, jerking, harsh engagement, delay in downshifts/ acceleration and component wear. We at LUBEGARD have been receiving TCC shudder/shifting issue related calls on the 6- and 8-speed units for years. It requires 20 quarts/19 liters of costly ATF (the average retail, online price for this fluid is $18.10 per quart) be flushed through the system to replace as much fluid as possible, yet, it still has not corrected the issue in all cases. This problem currently affects 11 different models across 3 different OEM brands for the model years between 20.Īfter implementing several fluid revisions, GM’s latest solution (TSB 18-NA-355) is lengthy, complicated and expensive. General Motors has published multiple technical service bulletins pertaining to torque converter clutch shudder issues in their 8-speed transmissions. ![]()
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