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.
| Brand | Mishimoto |
| Type | Direct-fit transmission cooler |
| Core | Stacked-plate |
| vs. Stock | +212% core volume, +244% fluid capacity |
| Thermostat | Fully serviceable, bypassable |
| 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 |
