Schaeffer's SynTuff® ULV Full Synthetic ATF

SynTuff 678 ULV Full Synthetic Automatic Transmission Fluid

Protect your transmission with SynTuff 678 ULV Full Synthetic ATF, a premium ultra-low viscosity automatic transmission fluid formulated for modern 8, 9, and 10-speed transmissions. Designed for compatible late-model GM automatic transmissions, this advanced synthetic fluid delivers dependable lubrication, smooth shifting, and long-lasting friction performance.

Formulated with premium synthetic base oils and a thermally stable additive system, SynTuff ULV provides excellent anti-shudder protection, increased torque capacity, and resistance to wear, oxidation, and deposit formation. Its ultra-low viscosity formulation promotes rapid fluid circulation during cold starts while supporting improved fuel efficiency and transmission durability.

Key Features

• Premium full synthetic ultra-low viscosity automatic transmission fluid
• Formulated for compatible modern 8, 9, and 10-speed transmissions
• Extended anti-shudder protection for smooth shifting
• Improved friction durability and torque capacity
• Excellent thermal and oxidation stability
• Helps prevent sludge, varnish, and lacquer deposits
• Advanced anti-wear protection for critical transmission components
• Excellent cold-temperature fluidity for rapid lubrication
• High viscosity index and low pour point
• Supports improved fuel economy and extended service intervals where approved

Fitment

2020-2026 L5P GM automatic transmissions requiring an ultra-low viscosity ATF that meets the fluid's published specifications. Intended for applicable 8-speed, 9-speed, and 10-speed transmission applications.

Important: Verify the manufacturer's required transmission fluid specification before use. Not all GM 8, 9, or 10-speed transmissions use the same ATF.