trucool 40k

Towing & Hauling

Chevy Express 3500 Transmission Cooler: TruCool 40K vs Knockoffs, Orientation Rules, and Radiator Bypass
ByWyatt Brooks July 21, 2026

Adding an external trans cooler to a 4L80E-equipped Express 3500? Here’s the real story on genuine vs knockoff TruCool 40K, inlet/outlet orientation, and whether to bypass the radiator.

Read More Chevy Express 3500 Transmission Cooler: TruCool 40K vs Knockoffs, Orientation Rules, and Radiator Bypass
Towing & Hauling

External Trans Cooler on a 4L80E Express 3500: TruCool vs Knockoff and Getting the Orientation Right
ByWyatt Brooks July 21, 2026

Upgrading to an external transmission cooler on a Chevy Express 3500 with a 4L80E? Here’s how the knockoff 40K compares to the real TruCool, and why inlet/outlet orientation actually matters.

Read More External Trans Cooler on a 4L80E Express 3500: TruCool vs Knockoff and Getting the Orientation Right