Fits: 2001 thru 2019 LB7/LLY/LBZ/LMM/LML/L5P Duramax Diesel with Allison 1000 Transmission

Castrol TranSynd 668 is a premium, full-synthetic automatic transmission fluid specifically formulated for Allison Transmission® on-highway automatic transmissions. TranSynd 668 provides oxidative stability, anti-wear performance, and friction durability, as well as TES 668™ specification differentiators such as extended anti-shudder durability and extended clutch friction durability. This fluid features an Allison TES 668 approval. The TES 668 spec is fully backwards compatible for TES 295® applications.

Features:

• Delivers improved gear protection.
• Delivers extended anti-shudder durability.
  
• Delivers extended clutch-friction durability.
• Excellent corrosion and foaming resistance.
• Excellent thermal and oxidative stability that helps to prevent deposits and oil thickening.
• Excellent transmission cleanliness under all conditions permits extended oil-drain intervals and decreased
  servicing.
• Excellent temperature reduction through reduced friction leads to longer oil and component life.
• Outstanding cold-flow properties enable faster oil flow to all critical components, particularly during cold starts.
• Optimized frictional characteristics gives smoother gear changing at all ambient temperatures and load
  conditions.
• Excellent shear stability properties help to retain full transmission performance over the entire oil-drain interval

Includes: 

• 6 x 1 Gallon Bottles of TranSynd 668 

Notes: 

• This TES 668 fluid is backward compatible with TES 295 fluid

Castrol Documents 

• Brochure
• Product Data