Fits: 2001 thru 2019 Chevy Silverado/GMC Sierra 2500HD/3500HD LB7/LLY/LBZ/LMM/LML/L5P Duramax Diesel

DmaxStore has put together this great package for our members to correctly service their Allison transmission.  These kits provide the correct amount of fluid and spin on external filter for 2001-2019 Duramax diesels using standard Allison transmission pans.

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.

Base Kit includes:

• 2 Gallons of Castrol TranSynd 668 Full Synthetic Fluid, which was specifically designed for the Allison Transmission. We have found this fluid to be far superior and completely compatible with Dexron 3 and Dexron 6.
  
• 1 Genuine Allison spin on transmission filter

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

Optional:

• DmaxStore Magnetic Allison Transmission Drain Plug
• Allison Drain Plug
• Transmission Spin-on Filter Magnet

Notes:

• Standard vs Deep Allison Pan: The Standard Allison Pan will become shallower towards the rear of the transmission, while the Deep Allison Pan will have a flat bottom. Standard Allison pan will take 2 gallons of Transynd, Allison Deep Sump pan will take an extra gallon. Aftermarket Deep Sump Pans will take 2-3 extra gallons depending on what aftermarket pan you have.
• Do NOT let the transmission drain overnight, this can cause all the fluid to drain in the transmission and will require more than just 2 or 3 gallons to do a basic service. 

Documents from Allison: Brochure, Characteristics