Quick Ship SKU #: MISH-MMTC-DMAX-17SL Mishimoto Transmission Cooler 17-19 GM 6.6L Duramax L5P

If you’re experiencing a transmission temperature increase, noises or poor transmission performance, or a transmission line leak, you could have a failed transmission cooler in your durable Duramax. Or maybe, you just want to upgrade to make your performance that much better, either way, and hopefully it’s the latter, Mishimoto has you covered with the Transmission Cooler that fits the 2017-2019 Duramax.

Mishimotos 2017-2019 Chevy/GMC 6.6L L5P 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 67% greater core volume, and 164% greater fin surface area than the stock 2017-2019 L5P 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 the Mishimoto Lifetime Warranty with Accident Protection for worry-free cooling as long as you own it.

*Silverado models require minor trimming of the grille to fit.