Home - Return to Previous Page
Additional Images

2 Gallons Allison Transynd TES 668 Synthetic Trans Fluid/Allison Spin On Filter

(2) 15E2E1 | 29539579
Please Call for Availability


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.

When servicing the Allison 1000 or Allison 2000 transmission on your GM vehicle, don’t forget about the external filter. This Allison Spin-On Filter is the correct OEM replacement for Allison 1000 and Allison 2000 transmissions. To keep your transmission healthy, Rudy's recommends replacing the spin-on filter every 12,000 miles. When changing this filter, ensure that you clean and reuse the filter magnet that is sandwiched between the filter and the transmission. Oftentimes, this magnet will stick to the filter and be discarded by mistake. 



  • OEM Allison Spin-on filter
  • 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.



  • 2001-2019 Chevrolet Silverado 2500HD/3500HD With Allison Transmission 
  • 2001-2019 GMC Sierra 2500HD/3500HD With Allison Transmission



  • Backwards Compatible with Allison TES 295

Shipping Information

  • Item Requires Shipping
  • FREE Ground Shipping

Customer Reviews

Comment Total Reviews (0)

Write the First Review!

You must login to post a review.