AMSOIL SAE 50 100% SYNTHETIC POWERSHIFT TRANSMISSION FLUID

AMSOIL SAE 50 100% Synthetic Powershift Transmission Fluid delivers the friction stability, shear resistance, and thermal durability that heavy-duty powershift transmissions and large truck manual transmissions demand. Built on synthetic base oils with a heavy additive package selected specifically for TO-4 and CD-50 applications, it keeps clutches engaging cleanly, gears protected, and wet brakes operating without chatter.

Powershift transmissions in dozers, wheel loaders, and mining equipment face a unique combination of sustained high torque, extreme heat, and constant clutch cycling. Conventional petroleum fluids break down under these conditions, losing viscosity, glazing clutch surfaces, and leaving deposits that shorten component life. Large truck manual transmissions from Eaton, Rockwell, Fuller, and Spicer face similar punishment, especially when loaded to capacity over long hauls.

PREVENTS CLUTCH GLAZING AND SLIPPAGE
Clutch slippage in a powershift transmission doesn't just waste power. It generates heat that bakes friction-surface deposits into the disc material, causing glazing and progressive degradation. AMSOIL SAE 50 Synthetic Powershift Transmission Fluid is formulated with non-slip friction properties compatible with both metallic and non-metallic friction materials. The result is responsive, smooth clutch engagement without the noise, vibration, or surface damage that leads to premature rebuilds.

STAYS IN GRADE UNDER SUSTAINED HIGH TORQUE
Shear stability is critical in any transmission fluid, but it matters even more in powershift applications where heavy loads are the norm rather than the exception. When a fluid shears down and drops out of its viscosity grade, the protective film between gears, bearings, and clutch plates thins. AMSOIL Synthetic Powershift Transmission Fluid is formulated for superior shear stability, maintaining its SAE 50 viscosity grade throughout its full service life. In Four-Ball Wear testing per ASTM D4172B at 40 kg, 75°C, 1200 rpm for one hour, the SAE 50 formulation produced a wear scar of just 0.45 mm, confirming strong anti-wear film strength at the contact point.

RESISTS THERMAL BREAKDOWN AND DEPOSIT FORMATION
High operating temperatures in powershift transmissions and final drives accelerate oxidation, which produces varnish, sludge, and deposits that restrict hydraulic passages and degrade clutch performance. AMSOIL SAE 50 Synthetic Powershift Transmission Fluid resists oxidative and thermal breakdown, functioning as an effective heat-transfer fluid that helps cool hot-running equipment. Components stay clean over extended drain intervals, reducing unplanned downtime and maintenance costs.

PROTECTS AGAINST RUST, CORROSION, AND FOAM
Equipment that sits idle between shifts or during seasonal shutdowns is vulnerable to internal rust and copper corrosion. AMSOIL Synthetic Powershift Transmission Fluid provides corrosion protection even during extended storage periods. It also resists foaming in service, which is essential because entrained air in the fluid causes compressibility issues in the hydraulic circuit and allows metal-to-metal contact where the oil film collapses.

COLD-WEATHER FLOW FOR DEPENDABLE STARTUPS
With a pour point of -36°C (-33°F) per ASTM D97, the SAE 50 formulation flows readily in cold ambient conditions for equipment operating in northern climates or high-altitude jobsites. Reliable cold-flow means faster fluid circulation at startup, reducing the dry-start wear window that shortens bearing and gear life.

SPECIFICATIONS AND COMPATIBILITY
AMSOIL SAE 50 Synthetic Powershift Transmission Fluid meets or is recommended for applications requiring the following specifications: Caterpillar TO-4, Komatsu KES 07.868.1, and Rockwell/Eaton/Fuller CD-50. It is fully compatible with other TO-4 fluids. Use it in Caterpillar, Komatsu, Clark, Hurth, Borg-Warner, Twin Disc, Voith, ZF, Funk, and Brockhouse powershift-type transmissions, as well as Eaton/Rockwell/Fuller, Spicer, Fabco, and Warner large truck manual transmissions. To install, drain the existing fluid, replace the filter if equipped, and fill with the appropriate viscosity.

SERVICE LIFE
AMSOIL Synthetic Powershift Transmission Fluid provides extended service life beyond conventional petroleum fluids when kept free of dirt and moisture. In CD-50 manual transmission applications, it may be used up to 60,000 miles or one year, whichever comes first. Oil analysis is recommended when extending service intervals beyond OEM recommendations.