Heating and Cooling› Oil and Fluid Coolers

Randy's Transmission

Randy s Transmissions 2003 - 2005 DURAMAX LB7 / LLY FLUIDYNE EXTREME DUTY BAR PLATE COOLER RT-A1-0305

$499.00

SKU: R068 RT-A1-0305

In Stock
In Stock
Ships by Jun 17
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Easy — 1–2 hours

Description

The Randy's Transmission RT-A1-0305 Fluidyne Heavy Duty Transmission Cooler is engineered for 2003-2005 GM 6.6L Duramax vehicles. It features a heavy-duty bar and plate design, aerospace-grade aluminum construction, and TIG welding for maximum durability. This cooler provides over four times the heat dissipation capacity compared to factory models, with 193% more core volume and fin surface area. It is pressure tested to 250 psi and comes with a limited lifetime warranty.

Fitment

Fitment Guaranteed

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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

BrandRandy's Transmission
Part NumberR068 RT-A1-0305

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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