Labeled are the main culprits for the heat produced inside of your transmission housing. A big portion of heat comes from the constant churning and compression of the fluid in the torque converter, on top of the slippage rates of the clutch packs.

All that heat is being produced from friction caused by components slipping, pressing, and syncing together. On average, the automatic transmission in your vehicle will be shifting through gears the smoothest between 160-180☏. As you sit and read this, your body is functioning at optimal capacity while hovering right around 98☏. Like your own body, the heart and soul of your Duramax operates best at a specific temperature. While the 9 rows on the factory cooler keep the transmission cool enough during regular driving, it shows its limited cooling abilities once a few thousand pounds are attached to the rear of the truck.īefore we start with the adorably small transmission cooler on the GM Duramax, some of you might be wondering why this extra heat exchanger is mounted on the front of your truck to begin with. For such an iconic towing machine, it seems strange to equip it with such a small transmission cooler. GM did include some help to keep your gears cool.

With the high temperatures produced by an automatic transmission, it seems almost cruel that the sweltering summer heat comes when most of the towing of campers, boats, and other outdoor toys happens. The Allison gearbox mated with your 6.6L Duramax is no exception. This 2001-2014 Chevy / GMC 6.6L Duramax Transmission Cooler is now available! Click here to check it out!Įxtreme heat is always the enemy, especially when it comes to vehicles equipped with an automatic transmission.

Gmc sierra cooling hole in front bumpr