{"product_id":"mishimoto-transmission-cooler-for-dodge-ram-2500-5500-2003-2009-silver-48-row-high-capacity-core","title":"Mishimoto Transmission Cooler for Dodge Ram 2500-5500 (2003–2009) — Silver, 48‑Row High‑Capacity Core","description":"\u003cp\u003e\u003cstrong\u003eThe Mishimoto MMTC-RAM-03SL is a direct-fit, high-capacity transmission cooler that replaces the factory unit on 2003–2009 Dodge Ram 2500–5500 Cummins trucks to radically improve fluid cooling and serviceability.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eFactory transmission coolers in Ram trucks were designed for everyday driving, not sustained heavy towing or fleet duty. Mishimoto redesigned the MMTC-RAM-03SL as a bolt-in replacement that installs in the original mounting location using the stock bolts while delivering far greater core volume, fluid capacity, and long-term reliability. It pairs a heavy-duty 48-row stacked-plate core with serviceable components and upgraded fittings to address common failure points found on high-mileage diesel trucks.\u003c\/p\u003e\n\n\u003ch3\u003eHow much more cooling capacity does this cooler provide?\u003c\/h3\u003e\n\n\u003cp\u003eThe MMTC-RAM-03SL dramatically increases both core volume and how much transmission fluid the cooler holds, reducing operating temperatures during heavy loads and repeated towing. Those gains translate to a cooler, more stable transmission under stress.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e212% increase in core volume over the OEM cooler\u003c\/li\u003e\n  \u003cli\u003e244% increase in fluid capacity compared with stock\u003c\/li\u003e\n  \u003cli\u003e48-row stacked-plate core for improved heat transfer\u003c\/li\u003e\n  \u003cli\u003eCompact footprint that fits the factory location (26\" x 10.94\" x 0.87\")\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eDoes it fit my Ram and how hard is installation?\u003c\/h3\u003e\n\n\u003cp\u003eThis unit is engineered as a direct replacement for 2003–2009 Dodge Ram 2500, 3500, 4500, and 5500 trucks with 5.9L or 6.7L Cummins and compatible with 47RE, 48RE, and 68RFE transmissions. Installation is simple because the cooler uses the original mounting position and requires only basic hand tools and the included hose components for a clean swap.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDirect-fit design uses two factory bolts in the stock location\u003c\/li\u003e\n  \u003cli\u003eCompatible with 5.9L and 6.7L Cummins models (2003–2009)\u003c\/li\u003e\n  \u003cli\u003eWorks with 47RE, 48RE, and 68RFE transmissions\u003c\/li\u003e\n  \u003cli\u003eIncludes stainless-steel hose barbs and SAE J1532-rated hose for permanent connections\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat serviceability and durability improvements does Mishimoto offer?\u003c\/h3\u003e\n\n\u003cp\u003eMishimoto focused on the parts that commonly fail on older Rams: the thermostat and quick-disconnect fittings. The cooler features a removable, independently replaceable thermostat and stainless-steel fittings so you can avoid seized OEM connectors and perform maintenance without replacing the entire cooler.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFully serviceable thermostat accessible from the top port\u003c\/li\u003e\n  \u003cli\u003eReplaceable thermostat avoids OEM closed-failure issues\u003c\/li\u003e\n  \u003cli\u003eStainless-steel CNC-machined hose barbs replace corrosion-prone quick-disconnects\u003c\/li\u003e\n  \u003cli\u003eSAE J1532-rated transmission hose included for long-term reliability\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCan I run this cooler full-time in hot climates or heavy-duty applications?\u003c\/h3\u003e\n\n\u003cp\u003eMishimoto includes a stainless-steel bypass plug that lets owners lock the cooler in a constant full-flow configuration when desired, providing flexibility for extreme environments or continuous heavy loads. This feature enables operators to choose maximum cooling or retained normal operating dynamics as conditions require.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eStainless-steel bypass plug allows constant full-flow operation\u003c\/li\u003e\n  \u003cli\u003eThermostat remains serviceable if seasonal or usage changes are needed\u003c\/li\u003e\n  \u003cli\u003e48-row core maintains consistent cooling during sustained towing or fleet cycles\u003c\/li\u003e\n  \u003cli\u003eRobust construction intended for working trucks and high-mileage vehicles\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The MMTC-RAM-03SL is designed for Ram owners who tow frequently, operate trucks in fleet or commercial settings, or who want a durable transmission cooling upgrade for high-mileage 2003–2009 5.9L and 6.7L Cummins trucks. If you need a drop-in replacement that improves cooling capacity, eliminates seized OEM fittings, and makes routine service simpler, this cooler is built for you.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Will this cooler fit my 2006 Ram 2500 with a 5.9L Cummins?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The MMTC-RAM-03SL is a direct-fit replacement for 2003–2009 Ram 2500 trucks with 5.9L Cummins engines and supports 47RE, 48RE, and 68RFE transmissions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Do I need special tools to replace the OEM quick-disconnects?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No special tools are needed; the kit includes CNC-machined stainless-steel hose barbs and SAE J1532-rated hose for a permanent, straightforward swap.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Mishimoto","offers":[{"title":"Default Title","offer_id":55170437153111,"sku":"B07HZKB867","price":667.77,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/mishimoto-front-view-installed-ram-trans-cooler.jpg?v=1790429339","url":"https:\/\/britishgarage.co.uk\/products\/mishimoto-transmission-cooler-for-dodge-ram-2500-5500-2003-2009-silver-48-row-high-capacity-core","provider":"British Garage","version":"1.0","type":"link"}