Shop / Transmission & Drivetrain / Mishimoto MMTC-DMAX-03SL Chevrolet/GMC 6.6L Duramax (LB7/LLY) Transmission Cooler, 2003-2005
Mishimoto
Mishimoto MMTC-DMAX-03SL Chevrolet/GMC 6.6L Duramax (LB7/LLY) Transmission Cooler, 2003-2005
MPN: MMT-MMTC-DMAX-03SL
There's no greater enemy for a transmission than heat. Whether your 2003-2005 Chevy/GMC 6.6L Duramax is a dedicated tow vehicle, hardworking fleet truck, or a daily driver with a liking for the drag strip, you need to ensure that your transmission runs cool.Luckily, Mishimoto has developed a dire…
$498.95
Ships From Supplier · Ships in 3–10 business days
Supplier availability is confirmed before your card is charged
Shipping calculated at checkout
Fitment sensitive
Select your truck to continue
This product is vehicle-specific. Select your year, make, model, engine and transmission to confirm compatibility before adding it to your cart.
1
Select your truck to continue
Shipping calculated at checkout
Ships directly from the supplier. The final shipping cost will be shown before payment.
- Ships from Mishimoto
Ships directly from our trusted supplier network.
Warranty
Warranty Information Pending
Warranty information has not yet been provided for this product. Contact FullSpecDiesel for help locating the applicable manufacturer or supplier warranty.
View complete warrantyThere's no greater enemy for a transmission than heat. Whether your 2003-2005 Chevy/GMC 6.6L Duramax is a dedicated tow vehicle, hardworking fleet truck, or a daily driver with a liking for the drag strip, you need to ensure that your transmission runs cool.Luckily, Mishimoto has developed a direct-fit transmission cooler to do just that. Our 2003-2005 Chevy/GMC 6.6L Duramax transmission cooler utilizes a stacked-plate design for maximum durability and powerful cooling. Aside from its durable construction, this transmission cooler is significantly larger than the stock core. The Mishimoto transmission cooler boasts a 174% greater core volume, and 192% greater fin surface area than the stock 2003-2005 Duramax transmission cooler.The included CNC-machined adapters connect directly to the stock transmission cooler lines for leak-free cooling. Direct-fit brackets and tailor-made hoses make installation easy. Like all Mishimoto products, this transmission cooler is backed up by our Lifetime Warranty with Accident Protection for worry free cooling as long as you own it.Key FeaturesDirect fit for all 2003-2005 Chevrolet/GMC 6.6L Duramax (LB7/LLY)Stacked-plate construction for maximum durability and superior coolingCNC-machined adapters make it easy to connect Mishimoto cooler to stock fluid lines or AN lines174% greater core volume than stock cooler192% greater external fin surface area over stock coolerPatent #D900,161Mishimoto Lifetime WarrantyPurchase IncludesMishimoto Stacked Plate Transmission CoolerCNC-Machined Quick-Disconnect to Hose Barb AdaptersStock-style Quick-Disconnect FittingsTransmission HosesMounting BracketsWorm Gear ClampsZip TieMounting HardwareMishimoto Lifetime WarrantySpecificationsRows13Core Length (in)27.95Core Height (in)5.78Core Thickness (in)1.25Engine Codes6.6L DuramaxChassis CodesLB7LLYNoteThis kit fits with late 2003 trucks with purple clips. Early 2003 trucks with orange clips should use MMTC-DMAX-01.
There's no greater enemy for a transmission than heat. Whether your 2003-2005 Chevy/GMC 6.6L Duramax is a dedicated tow vehicle, hardworking fleet truck, or a daily driver with a liking for the drag strip, you need to ensure that your transmission runs cool.Luckily, Mishimoto has developed a direct-fit transmission cooler to do just that. Our 2003-2005 Chevy/GMC 6.6L Duramax transmission cooler utilizes a stacked-plate design for maximum durability and powerful cooling. Aside from its durable construction, this transmission cooler is significantly larger than the stock core. The Mishimoto transmission cooler boasts a 174% greater core volume, and 192% greater fin surface area than the stock 2003-2005 Duramax transmission cooler.The included CNC-machined adapters connect directly to the stock transmission cooler lines for leak-free cooling. Direct-fit brackets and tailor-made hoses make installation easy. Like all Mishimoto products, this transmission cooler is backed up by our Lifetime Warranty with Accident Protection for worry free cooling as long as you own it.Key FeaturesDirect fit for all 2003-2005 Chevrolet/GMC 6.6L Duramax (LB7/LLY)Stacked-plate construction for maximum durability and superior coolingCNC-machined adapters make it easy to connect Mishimoto cooler to stock fluid lines or AN lines174% greater core volume than stock cooler192% greater external fin surface area over stock coolerPatent #D900,161Mishimoto Lifetime WarrantyPurchase IncludesMishimoto Stacked Plate Transmission CoolerCNC-Machined Quick-Disconnect to Hose Barb AdaptersStock-style Quick-Disconnect FittingsTransmission HosesMounting BracketsWorm Gear ClampsZip TieMounting HardwareMishimoto Lifetime WarrantySpecificationsRows13Core Length (in)27.95Core Height (in)5.78Core Thickness (in)1.25Engine Codes6.6L DuramaxChassis CodesLB7LLYNoteThis kit fits with late 2003 trucks with purple clips. Early 2003 trucks with orange clips should use MMTC-DMAX-01.
Product conditions
Professional installation is recommended.
- Return eligibility
- Returnable within 30 days of confirmed delivery, in original condition, with an approved RMA
- Return window
- 30 days from confirmed delivery
- Restocking fee
- No restocking fee
- Return shipping
- Customer pays return shipping on voluntary returns
- Made to order
- No
- Backorder status
- Not backordered
- Cancellation
- Cancellation is only possible before the supplier order is submitted
- Warranty provider
- Warranty Information Pending
- Warranty duration
- Pending verification
- Compatibility
- Listed for specific vehicle configurations
- Legal use
- Street legal
- Processing estimate
- 3–10 business days supplier processing
- Shipping
- Shipping calculated at checkout
- Signature
- No signature requirement
- Supplier
- Mishimoto
Product compatibility is based on the vehicle and product information provided. Review your selected truck, product options, measurements, modifications, and installation requirements before ordering.