Shop by Vehicle
Add New
Cart
USA
Amsoil Logo
Shop by Vehicle
Find AMSOIL Near You
AMSOIL · Product code CTL

AMSOIL SAE 50 100% Synthetic Powershift Transmission Fluid

AMSOIL Synthetic Powershift Transmission Fluid is specifically designed for high-torque, heavy-duty powershift transmissions. Formulated for extended drain intervals, Powershift Transmission Fluid contains top-quality synthetic base oils and a high level of top-quality additives selected specifically for powershift transmissions. It offers exceptional transmission friction performance, smooth brake operation, gear and bearing wear protection and maximum equipment life.

Buy at AMSOIL
CTL05-EA
5 Gallon Pail
CTL27-EA
275 Gallon Tote
CTL55-EA
55 Gallon Drum

AMSOIL Synthetic Powershift Transmission Fluid is specifically designed for high-torque, heavy-duty powershift transmissions. Formulated for extended drain intervals, Powershift Transmission Fluid contains top-quality synthetic base oils and a high level of top-quality additives selected specifically for powershift transmissions. It offers exceptional transmission friction performance, smooth brake operation, gear and bearing wear protection and maximum equipment life.

Helps Prevent Clutch Slippage
AMSOIL Synthetic Powershift Transmission Fluid is compatible with common metallic and non-metallic friction materials. Its stable frictional characteristics help eliminate excessive brake noise and vibration. Its non-slip friction properties are designed to prevent clutch slippage, which can cause glazing or friction-surface deposits and material degradation. Powershift Transmission Fluid is formulated to deliver responsive yet smooth clutch engagements, excellent power transmission through clutches and synchronizers and superior hydraulic fluid performance.

Excellent Wear Protection
AMSOIL Synthetic Powershift Transmission Fluid meets the wear and frictional requirements of the Caterpillar* TO-4 specification and is formulated for superior shear stability. Its superior shear stability allows Powershift Transmission Fluid to stay in grade throughout its service life, providing long-term protection against equipment wear, even when equipment is frequently subjected to sustained high torque.

Superior High- and Low-Temperature Performance
In high temperatures, AMSOIL Synthetic Powershift Transmission Fluid effectively protects components from wear. Its superior oxidative and thermal stability inhibits the formation of varnish, deposits and sludge so equipment runs clean. Synthetic Powershift Transmission Fluid functions as a heat-transfer fluid and helps cool hot-running equipment. In low temperatures, Synthetic Powershift Transmission Fluid flows readily for dependable startup and post-startup protection.

Copper Corrosion, Rust and Foam Inhibition
AMSOIL Synthetic Powershift Transmission Fluid protects equipment from copper corrosion and rust, even during equipment storage. It does not foam in service, protecting equipment from metal-to-metal contact and wear.

  • Helps eliminate clutch glazing and vibration

  • Protects against gear and bearing wear

  • Helps keep components clean

  • Guards against rust and corrosion

Performance Data
AMSOIL SAE 50 (CTL) Synthetic Powershift Transmission Fluid is recommended for applications requiring the following specifications:

  • Caterpillar* TO-4

  • Komatsu* KES 07.868.1

  • Rockwell*/Eaton*/Fuller* CD-50

Applications

  • Dozers

  • Heavy-duty manual transmission

  • Wheel loaders and crawlers

  • Backhoe loaders

  • Cranes

  • Off-road fork trucks

  • Harbor-handling equipment

  • Railway equipment

  • Mining equipment

  • Road graders

  • Commercial marine applications

AMSOIL Synthetic 10W, 30 and 50 Powershift Transmission Fluids can be used in Caterpillar, Allison, Komatsu, Clark*, Hurth*, Borg-Warner*, Twin Disc*, Voith*, ZF, Funk* and Brockhouse* powershift-type transmissions and Eaton/Rockwell/Fuller transmissions.

IINSTALLATION
AMSOIL Synthetic Powershift Transmission Fluid is fully compatible with other TO-4 fluids used in powershift applications. To install AMSOIL Synthetic Powershift Transmission Fluid, drain the fluid in the system, replace the filter (if equipped) and install the appropriate viscosity of Powershift Transmission Fluid.

SERVICE LIFE
AMSOIL Synthetic Powershift Transmission Fluid provides extended service life beyond conventional petroleum fluids if Synthetic Powershift Transmission Fluid is kept free of dirt and moisture. Oil analysis is recommended if extending service intervals beyond equipment manufacturer recommendations.

AMSOIL Synthetic Powershift Transmission Fluid may be used up to 60,000 miles or one year (whichever comes first) in CD-50 manual transmission applications or as specified by the OEM.

AMSOIL PRODUCT WARRANTY
AMSOIL products are backed by a Limited Liability Warranty. For complete information, visit www.amsoil.com/warranty/.

HEALTH & SAFETY
This product is not expected to cause health concerns when used for the intended applications and according to the recommendations in the Safety Data Sheet (SDS). An SDS is available
online at www.amsoil.com or upon request at (715) 392-7101. Keep Out of Reach of Children.

Data Bulletins

SDS

WARRANTY

Applications

  • Dozers
  • Heavy-duty manual transmissions
  • Wheel loaders and crawlers
  • Backhoe loaders
  • Cranes
  • Off-road fork trucks
  • Harbor-handling equipment
  • Railway equipment
  • Mining equipment
  • Road graders
  • Commercial marine applications

Use AMSOIL SAE 50 Synthetic Powershift Transmission Fluid in Rockwell/Eaton/Fuller, Spicer, Fabco, Warner and other large truck manual transmissions.

Use AMSOIL Synthetic Powershift Transmission Fluid in Caterpillar, Allison, Komatsu, Clark, Hurth, Borg-Warner, Twin Disc, Voith, ZF, Funk and Brockhouse powershift-type transmissions and Eaton/Rockwell/Fuller transmissions.

Performance Specifications

  • Caterpillar TO-4
  • Komatsu KES 07.868.1
  • Rockwell/Eaton/Fuller CD-50

Synthetic Powershift Transmission Fluid

Advanced Formulation for Powershift and Manual Transmissions, Wet Brakes and Final Drives

AMSOIL Synthetic Powershift Transmission Fluid is specifically designed for high-torque, heavy-duty powershift transmissions. Formulated for extended drain intervals, Powershift Transmission Fluid contains top-quality synthetic base oils and a heavy dose of premium additives selected specifically for powershift transmissions. It offers exceptional transmission friction performance, smooth brake operation, gear and bearing wear protection and maximum equipment life.

  • Helps eliminate clutch glazing and vibration
  • Protects against gear and bearing wear
  • Helps keep components clean
  • Guards against rust and corrosion

Helps Prevent Clutch Slippage

AMSOIL Synthetic Powershift Transmission Fluid is compatible with common metallic and non-metallic friction materials. Its stable frictional characteristics help eliminate excessive brake noise and vibration. Its non-slip friction properties are designed to prevent clutch slippage, which can cause glazing or friction-surface deposits and material degradation. AMSOIL Synthetic Powershift Transmission Fluid is formulated to deliver responsive yet smooth clutch engagement, excellent power transmission through clutches and synchronizers and superior hydraulic fluid performance.

Excellent Wear Protection

AMSOIL Synthetic Powershift Transmission Fluid meets the wear and frictional requirements of the Caterpillar* TO-4 specification and is formulated for superior shear stability. Its shear stability allows it to stay in grade throughout its service life, providing long-term protection against equipment wear, even when equipment is frequently subjected to sustained high torque.

Superior High- and Low-Temperature Performance

In high temperatures, AMSOIL Synthetic Powershift Transmission Fluid effectively protects components from wear. Its superior oxidative and thermal stability inhibits the formation of varnish, deposits and sludge so equipment runs clean. It functions as a heat-transfer fluid and helps cool hot-running equipment. In low temperatures, AMSOIL Synthetic Powershift Transmission Fluid flows readily for dependable startup and post-startup protection.

Copper Corrosion, Rust and Foam Inhibition

AMSOIL Synthetic Powershift Transmission Fluid protects equipment from copper corrosion and rust, even during equipment storage. It does not foam in service, protecting equipment from metal-to-metal contact and wear.

Installation

AMSOIL Synthetic Powershift Transmission Fluid is fully compatible with other TO-4 fluids used in powershift applications. To install AMSOIL Synthetic Powershift Transmission Fluid, drain the fluid in the system, replace the filter (if equipped) and install the appropriate viscosity of AMSOIL Synthetic Powershift Transmission Fluid.

SERVICE LIFE

AMSOIL Synthetic Powershift Transmission Fluid provides extended service life beyond conventional fluids if AMSOIL Synthetic Powershift Transmission Fluid is kept free of dirt and moisture. Oil analysis is recommended if extending service intervals beyond equipment manufacturer recommendations. AMSOIL Synthetic Powershift Transmission Fluid may be used up to 60,000 miles (96,500 km) or one year (whichever comes first) in CD-50 manual transmission applications or as specified by the OEM.

Technical Properties

PropertyCTL (SAE 50)
SAE Viscosity Grade50
Kinematic Viscosity @ 100°C, cSt (ASTM D445)18.2
Kinematic Viscosity @ 40°C, cSt (ASTM D445)165.2
Viscosity Index (ASTM D2270)123
Flash Point °C (°F) (ASTM D92)224 (435)
Fire Point °C (°F) (ASTM D92)246 (475)
Pour Point °C (°F) (ASTM D97)-36 (-33)
Four-Ball Wear Test (ASTM D4172B @ 40 kg, 75°C, 1200 rpm, 1 hr) scar, mm0.45

Customer Reviews

5.0 out of 5 from 4 reviews

Synthetic Powershift Transmission Fluid

5.0 / 5

I have been using this product in the rear end of my 1971 Flextrack Nodwell snow cat for over ten years. It performs well with wet brakes and keeps the gear box well protected and cool.

By AJ, Jackson hole on January 29, 2026 · Verified Buyer · Recommends this product · Helpful: 0

Best transmission in oil by far.

5.0 / 5

I use this in all of our manual transmissions and so far I like what see smoother shifts. The guys are very hard on the trucks so I want the best in them.

By JOHN, Marlboro nj on June 23, 2025 · Verified Buyer · Recommends this product · Helpful: 0

https://www.amsoil.com/p/synthetic-powershift-transmission-f

5.0 / 5

Use in tractor manual transmission and is awesome. Use also in Case 450 dozer hydraulic transmission and unit has strong pushing torque all day and every day

By Gary, Ky on August 31, 2023 · Verified Buyer · Recommends this product · Helpful: 0

Never disappoints

5.0 / 5

Was doing a clutch on a Eaton 13 speed and decided to replace the oil not knowing the status of the oil that was in the transmission. Oil looked fine but replaced anyway and so glad I did because it actually shifts so much smoother now. I love amsoil products and they will never let you down!

By DAVID, Akron, OH on June 12, 2022 · Verified Buyer · Recommends this product · Helpful: 5



Select your country