The Mishimoto transmission cooler for the 2003-2009 Dodge Ram 2500/3500 5.9L and 6.7L Cummins is a direct-fit, stacked-plate upgrade with a massive 212% greater core volume and 244% greater fluid capacity than the stock cooler. It also solves a common failure point: where the factory thermostat fails closed and returns hot fluid to the transmission, Mishimoto's thermostat is fully serviceable through a port at the top of the cooler and can be easily bypassed for constant cooling. Replacement thermostats are available separately.
| Type | Direct-fit transmission cooler |
| Core | Stacked-plate |
| vs. Stock | +212% core volume, +244% fluid capacity |
| Thermostat | Fully serviceable, bypassable |
| Part Number | MMTC-RAM-03SL |
| Warranty | Mishimoto Lifetime Warranty |
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2003,2005-2009 | Dodge | Ram 2500 | Laramie |
| 2006-2009 | Dodge | Ram 2500 | Power Wagon |
| 2003-2009 | Dodge | Ram 2500 | SLT |
| 2006-2007 | Dodge | Ram 2500 | Sport |
| 2003-2009 | Dodge | Ram 2500 | ST |
| 2008-2009 | Dodge | Ram 2500 | SXT |
| 2006-2007 | Dodge | Ram 2500 | TRX4 |
| 2003-2009 | Dodge | Ram 3500 | Laramie |
| 2003-2009 | Dodge | Ram 3500 | SLT |
| 2006-2007 | Dodge | Ram 3500 | Sport |
| 2003-2009 | Dodge | Ram 3500 | ST |
| 2008-2009 | Dodge | Ram 3500 | SXT |
| 2007 | Dodge | Ram 3500 | TRX4 |
Shipping: In-stock orders placed before 3 PM EST ship the same day, and everything else ships within 24 hours. Standard, expedited, and overnight options are available at checkout. Backordered items ship as soon as we get them back in stock. Contact us for lead times. See the full Shipping Policy.
Returns: 30-day returns on new, unused items in original packaging. See the full Refund Policy.
