Mishimoto 01-03 Chevrolet / GMC 6.6L Duramax (LB7) Transmission Cooler
Mishimoto 01-03 Chevrolet / GMC 6.6L Duramax (LB7) Transmission Cooler
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Mishimoto 01-03 Chevrolet / GMC 6.6L Duramax (LB7) Transmission Cooler
Heat is the notorious enemy of any transmission, and ensuring your vehicle stays cool is essential for optimal performance. Whether your 2001-2003 Chevy or GMC 6.6L Duramax serves as a dedicated towing machine, a hardworking fleet truck, or a daily driver with a penchant for the drag-strip, the Mishimoto Transmission Cooler is engineered to keep your transmission running smoothly.
Key Features:
- Advanced Cooling Technology: Featuring a stacked-plate design, this cooler maximizes durability and cooling efficiency.
- Significantly Larger Core: With a core volume that is 174% greater than the stock unit, experience enhanced heat dissipation.
- Increased Surface Area: The cooler boasts a 192% greater fin surface area compared to the stock transmission cooler, providing superior cooling performance.
- Direct Installation: CNC-machined adapters connect directly to the stock transmission cooler lines, ensuring a leak-free operation.
- Easy Setup: Comes with direct-fit brackets and tailor-made hoses for a hassle-free installation process.
Benefits:
- Prevents overheating, ensuring the longevity and reliability of your transmission.
- Ideal for various applications, from towing heavy loads to daily commuting and performance driving.
- Peace of mind with a Lifetime Warranty, including Accident Protection for worry-free cooling as long as you own it.
Upgrade your 2001-2003 Chevy/GMC 6.6L Duramax with the Mishimoto Transmission Cooler and experience the difference in performance and reliability. Don't let heat compromise your driving experience—choose Mishimoto for maximum cooling efficiency!
Shipping & Returns
Shipping & Returns
📦 Shipping:
Orders are processed within 1–2 business days. Standard delivery takes 3–7 business days, depending on your location.
↩️ Returns:
You may return or exchange products within 60 days of receiving your order. Items must be in original condition with proof of purchase. If your item is defective or damaged due to manufacturing issues, we’ll replace it at no additional cost.

