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Seasonal Pick 3 Gallons Allison Transynd Tes 668 On-highway Full Synthetic Transmission Fluid Your 90% Coupon Inside [ZY1qXVeS]

$27.99 $89.99 -69%

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 durabi

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Seasonal Pick 3 Gallons Allison Transynd Tes 668 On-highway Full Synthetic Transmission Fluid Your 90% Coupon Inside [ZY1qXVeS]

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, but is not backwards compatible for TES 468™ applications.

 

Features:

  • Includes 3 gallons of Transynd Fluid
  • 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 temperature reduction through reduced friction leads to longer oil and component life.
  • Excellent shear stability properties help to retain full transmission performance over entire oil-drain interval.
  • Outstanding cold-flow properties enables 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 transmission cleanliness under all conditions permits extended oil-drain intervals and decreased servicing.

 

Fitment:

  • 2001-Current Chevrolet Silverado 2500HD/3500HD With Allison Transmission 
  • 2001-Current GMC Sierra 2500HD/3500HD With Allison Transmission

 

Note:

  • Backwards Compatible with Allison TES 295

What Our Customers Say

January 16, 2026

Absolutely no complaints!

It's a very well-made and durable device. I expect it to last long.

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January 16, 2026

Absolutely no complaints!

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January 16, 2026

Absolutely no complaints!

This is a product that inspires confidence. It's so well-built.

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