Signature Series Synthetic Automatic Transmission Fluid
Transmissions in commercial vehicles, SUVs, trucks and vans – particularly those used for hauling or towing – are subjected to severe-service operation and increased heat. Elevated temperatures cause fluids to break down, allowing damaging metal-to-metal contact and the formation of sludge and deposits. The problem is worse in modern transmissions with more gears, clutch packs and narrow oil passages that require clean, high-quality fluid to achieve maximum performance and life.
AMSOIL Signature Series Synthetic Automatic Transmission Fluid is specically formulated to withstand the rigors of heavy towing, elevated temperatures and challenging terrain. It remains uid in sub-zero temperatures and provides reserve protection during heavy use and abuse.
Proven in 180,000-mile, Severe-Service Taxi Fleet Field Trial
To demonstrate its effectiveness in severe service, Signature Series Multi-Vehicle Synthetic ATF was installed in Las Vegas taxi cabs. The vehicles routinely encoun- tered demanding stop-and-go driving loaded with passengers and cargo, while the desert environment presented extremely hot ambient temperatures, placing enormous strain on the uid. Following 180,000 miles, a transmission was selected for analysis. The Aluminum Beaker Oxidation Test (ABOT) is an industry standardized test used
to determine a transmission uid’s oxidation resistance, which is a good indicator of its service life. Testing by an independent, third-party lab revealed that after 180,000 miles in severe service, Signature Series Multi-Vehicle Synthetic ATF resisted oxida- tion longer than required for new uid to meet the Chrysler ATF+4 speci cation (see graph). Internal components, including the valve body and clutch plates (pictured), were virtually free of damaging sludge, deposits and wear, con rming the lubricant’s high level of protection for severe-service applications.
Protects Against Thermal Breakdown
Signature Series Synthetic ATF is formulated with high concentrations of antioxidants, making it naturally heat resistant. It provides outstanding protection against sludge and varnish deposits that clog narrow oil passages and contribute to clutch glazing. After 180,000 miles in severe service, uid analysis revealed Signature Series Multi- Vehicle Synthetic ATF contained 83 percent of its original oxidation inhibitors, proving its long-lasting resistance to thermal breakdown.
Outstanding Wear Protection
Varying speeds and loads causes torque multiplication and ex- treme stress on gears and bearings. AMSOIL formulated Signature Series Synthetic ATF with high lm strength and premium anti-wear/ extreme-pressure additives to help prevent wear during severe service. In the industry-standard FZG Gear Wear Test, Signature Series Multi-Vehicle Synthetic ATF that had been used for 180,000 severe-service miles achieved a “Pass” at stage 12 – the highest stage. The results exceeded the Ford MERCON V and Chrysler ATF+4 speci cations for new uid, demonstrating the lubricant’s long-lasting wear protection.
Cold, thick automatic transmission uid lengthens shift times and reduces fuel economy. Signature Series Synthetic ATF is wax-free and delivers extraordinary cold- ow properties. It helps improve shift response, energy ef ciency and warm-up times.
Today’s transmissions are smaller and must withstand higher horse- power and torque while delivering smoother shifts, all with longer uid life recommendations. AMSOIL Signature Series Synthetic ATF is formulated with friction modi er additives that deliver outstand- ing clutch-holding capacity (static friction), torque-transfer ability (dynamic friction) and anti-shudder properties (slipping torque- converter clutches). Analysis reveals that after 180,000 miles in severe service, Signature Series Multi-Vehicle Synthetic ATF provides nearly identical friction properties as new uid for smooth, reliable shifts.
Normal Service: Follow the vehicle manufacturer’s normal-service drain interval.
Severe Service: Double the vehicle manufacturer’s severe-service drain interval.
Change at the vehicle manufacturer’s recommended drain interval outside U.S. and Canada.