Exterior Components› Body Panels and Components

Merchant Automotive

Transynd Full Synthetic Transmission Fluid 1GAL

$79.36

SKU: M01D TRANSYND668

In Stock
In Stock
Ships by Jun 15
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

The Merchant Automotive TRANSYND668 is a full synthetic transmission fluid engineered for enhanced performance and longevity. Unlike conventional fluids that degrade under heat and stress, this synthetic formulation offers superior thermal resistance and is virtually impervious to shear.

TranSynd 668 provides better protection, extended transmission life, and helps keep Duramax transmissions running smoothly. It is formulated from pure synthetic lubricants with inherent thermal and viscosity advantages and exceeds Allison TES 295 specifications, being engineered by Castrol.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandMerchant Automotive
Part NumberM01D TRANSYND668

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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