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Your cart is empty.There's no greater enemy for a transmission than heat. Whether your 1999-2013 GMT800 or 900 Chevy Silverado/GMC Sierra is a dedicated tow vehicle, hardworking fleet truck, or a daily driver, you need to ensure that your transmission runs cool. Luckily, Mishimoto has developed a cooler to do just that.----Our 1999-2013 Chevy Silverado/GMC Sierra performance transmission cooler utilizes a stacked-plate design for maximum durability and powerful cooling. With a massive core that’s 521% larger than stock, and a 278% increase in frontal area, the Mishimoto transmission cooler adds significant cooling capacity to your truck whether you’re towing a heavy load, or low-speed driving on the trail. Internal fins and louvered external fins circulate cool air and fluid throughout the core for optimal heat transfer.----Included with the Mishimoto transmission cooler are precision-machined -6ORB quick-disconnects that connect directly to the stock lines, or can be removed allow the use of -6AN lines. We also include a relocation bracket for the ambient air temperature sensor to keep full functionality of your truck. An adjustable mounting bracket makes installing this transmission cooler a breeze in an hour or less.--Like all Mishimoto products, our 1999-2013 Chevy Silverado/GMC Sierra transmission cooler is backed by our Lifetime Warranty with Accident Protection for worry-free cooling as long as you own it.
Matt M
Reviewed in the United States on May 20, 2025
Works great and absolutely love the way it looks through the grill.
Customer
Reviewed in the United States on March 20, 2025
Note: I rarely ever review any product, but this purchase is a must to review.Mishimoto is a renowned brand known for its high-quality parts. While reading reviews with pictures of the transmission cooler fins damaged during shipping, I anticipated some minor damage as the fins are very fragile. However, to my surprise, the part arrived in pristine condition, with no signs of damage at all. Mishimoto truly outdid themselves in packaging the product.My 2009 GMC Sierra used to idle at 144 degrees. Thanks to this transmission cooler, it now idles at a much cooler 118 degrees. I’ll update this review sometime later this week as I just had it installed today. Also, another review next month when I embark on a cross-country trailer tow. So far, this direct bolt-on plug-n-play transmission cooler has proven to be worth every penny.05/15/2025Update: I towed a 5,550 lbs total weight trailer from California to Louisiana and the max temperature my transmission reached was 175 degrees. Mind you the transmission went through a lot of strain going uphill and downhill through this cross country trip, while with the temperature outside being in the 90s. Transmission temperature was in low 140s after I passed the mountains. This transmission cooler was worth every penny and I am very happy with the purchase. This Mishimoto transmission cooler is very high quality and looks so damn good. Thank you Mishimoto for existing!
The Dood
Reviewed in the United States on April 29, 2025
Easiest trans cooler upgrade I have ever done. This went onto a 8.1/4l85e/10.5 Yukon XL in about 15 minutes total. It didn't come with instructions, but youtube was helpful. The stock cooler lines clipped right in, as did the temp sensor. No modifications were needed, as this fit great. A little top up on the fluid, and I'm now seriously 60 degrees cooler in town than the stock cooler. I will return to this review if needed, but so far, this doesn't leak, looks great, and definitely reduced the transmission temperature.
Mark clough
Reviewed in the United States on April 19, 2025
2000 chevy silverado, So I have a stage 3 trans with a 3000 stall converter because I have a big cam in a 5.3 ls. I went with a aftermarket cooler to get temps down and a fan also but trans was still getting to 200 205 degrees... So I got the mishimoto cooler man let me tell you temps are down to 165 degrees and that was me beating on it doing 0 to 100 pulls for an hour or so worth every penny...The best thing about it was it bolted right up in 30 mins...Thanks mishimoto..😁😁😁😁
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