Mishimoto® (14-18) Silverado/Sierra 14-Row Transmission Cooler
- In stock, ready to ship
- Free Shipping USA (Exc. HI, AK, PR)
2014 - 2018 Chevy Silverado
2014 - 2018 GMC Sierra
Minor drilling is required to install the adapter lines for this cooler. Please see the included drilling template and written or video installation instructions for a detailed guide. 2014 model year vehicles require relocation of the ambient air temperature sensor. Please see the included installation note card for detailed instructions.
There’s no greater enemy for a transmission than heat. Whether your 2014–2018 Chevy Silverado/GMC Sierra 1500 V8 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 2014–2018 Chevy Silverado/GMC Sierra 1500 V8 transmission cooler utilizes a stacked-plate design for maximum durability and powerful cooling. The Mishimoto transmission cooler mounts in line with the factory cooling system to add an extra 0.65 quarts of transmission fluid and over 3,000 square inches of surface area for a significant increase in cooling potential.
Included with the Mishimoto transmission cooler are adapter lines that connect directly to the stock cooling system and a relocation bracket for the ambient air temperature sensor. CNC-machined mounting brackets and high-grade transmission cooler hoses make installing this transmission cooler a breeze. Also provided with this kit is a thermal bypass valve delete that allows fluid to flow to the cooler at all times, making this cooler ideal for drivers in hot climates.
Like all Mishimoto products, our 2014–2018 Chevy Silverado/GMC Sierra 1500 V8 transmission cooler is backed by our Lifetime Warranty with Accident Protection for worry-free cooling as long as you own it.
- Fits all 2014–2018 Chevrolet Silverado and GMC Sierra 1500 V8*
- Stacked-plate construction for maximum durability and superior cooling
- Adds an extra 0.65 quarts of transmission fluid and over 3,000 square inches of cooling surface area
- Durable aluminum adapter lines and CNC-machined brackets make installation easy
- Includes ambient air temp sensor relocation bracket for 2014 models
- Included thermal bypass valve delete allows fluid flow to the cooler at all times for vehicles in hot climates
- Patent pending
- Mishimoto Lifetime Warranty
(1) Mishimoto Stacked-Plate Transmission Cooler
(2) High-Pressure Transmission Cooler Lines
(2) High-Strength Aluminum Transmission Cooler Adapter Lines
(2) Pre-Installed CNC-Machined Aluminum Mounting Brackets
(2) CNC-Machined Aluminum Mounting Brackets
(1) Removable Thermal Bypass Valve Delete
(1) Ambient Air Temperature Sensor Relocation Bracket
(1) Stick-On Drilling Template
(1) Installation Note Card
Mishimoto Lifetime Warranty
|INCREASE IN OIL CAPACITY||0.65 quarts
|ALSO FITS||2015+ Cadillac Escalade 6.2L V8
2015+ Cadillac Escalade 6.2L V8
2014–2018 Chevrolet Silverado 1500 5.3L V8
2014–2018 Chevrolet Silverado 1500 6.2L V8
2015+ Chevrolet Suburban 5.3L V8
2015+ Chevrolet Tahoe 5.3L V8
2014-2018 GMC Sierra 1500 5.3L V8
2014-2018 GMC Sierra 1500 6.2L V8
2015+ GMC Yukon 5.3L V8
2015+ GMC Yukon 6.2L V8
2015+ GMC Yukon XL 5.3L V8
2015+ GMC Yukon XL 6.2L V8
|FLUID CAPACITY||0.65 quarts|
Trying something new can be a daunting, especially when you’re changing something you’ve done well for a long time. In the case of our 2014+ Chevy/GMC K2 transmission cooler, the design of the stock transmission cooler had us stepping off the beaten path in search of the best possible solution.
In our previous posts, we discussed the design of the stock cooler that’s integrated with the A/C condenser and how we would be adding an external cooler to supplement it. We had our core (the same one that we used on our Duramax project) mounted behind the grille of our volunteer K2, but we had no way of getting transmission fluid. This is where we really looked to challenge ourselves and raise the bar for the quality of aftermarket coolers.
Our plan was to intercept the ATF before it went to the stock transmission cooler. The path of fluid would be from the transmission to our cooler, and then to the stock cooler and back to the transmission or radiator. This would take a huge load off the stock coolers and help prevent over-cooling in the event the customer wanted to use the thermostatic bypass valve delete that will be included with our cooler.
The stock transmission cooler is connected to the transmission and radiator with hardlines and quick-disconnects. For our cooler to intercept the flow of fluid, we would need to connect those hardlines to our cooler’s hose barbs. We could just slide some transmission hose over the stock hardlines and clamp it down, but the quick-disconnect ends weren’t designed to hold a transmission hose. We would still need to find a way to route the hose to the cooler. Not to mention, we would also need an adapter to go from the transmission cooler hose to the quick-disconnect on the stock cooler. Since designing an adapter was unavoidable, we decided to make it as clean and simple as possible.
Our engineer designed two adapters that connect seamlessly to the hardlines. The first adapter has a female quick-disconnect on one end to connect to the stock transmission hardline. The other end of that adapter utilizes a barb design rated to hold well over the pressure generated by the transmission. The other adapter goes from that hose barb end to the stock male quick-disconnect end and connect our cooler back into the stock transmission cooler. Two small holes drilled in the plastic shrouding around the A/C condenser allow the adapters to bridge the gap between the stock cooler and ours.
The cooler was plumbed, and it was time for the part that most of you probably came here for: temperature testing. From previous projects, we’ve found that getting a truck transmission up to temperature on our DynaPacks can be challenging and doesn’t always yield great scientific data. Road testing lets us load the transmissions more, but traffic and varying weather conditions often make getting apples-to-apples data nearly impossible. When we tested our 2nd Gen Ram Cummins transmission cooler, we developed a new way to gather consistent data that would allow us to compare the efficiency of our coolers versus their stock counterparts.
With the help of a vat of ATF heated to a constant temperature, an electric oil pump, and our variable-speed dyno fan, we began bench testing the two coolers. First up would be the stock cooler. Once the ATF reached operating temperature, we activated the oil pump and filled the stock cooler with hot ATF. After waiting for the fluid temp at the cooler’s outlet to equal the inlet temp, we turned on the dyno fan and set it to produce the same wind speed seen behind the grille of the K2. The inlet and outlet temperatures fell (slightly) and eventually leveled off. We knew that we had reached the thermal efficiency of the stock cooler; it was no longer able to cool the ATF. We recorded the inlet and outlet temperatures for the stock cooler alone, then repeated the test with our cooler plumbed in before the stock cooler.
Our cooler adds an extra 0.65 quarts of fluid to the transmission cooling system and an extra 3,000 square-inches of cooling surface. We were confident that it would be a significant upgrade to the stock transmission cooler.
The data showed that our cooler was able to reduce inlet temps by about 10°F and outlet temps by a whopping 30°F when compared to the stock cooler alone. That’s a 37% decrease in fluid temperature. And while the numbers on the chart below won’t necessarily be the same numbers you see on your truck’s trans temp gauge, we know from our Duramax transmission cooler that the efficiency shown in bench testing should be the same as on-road conditions, if not better.
Our temp testing confirmed that this project was ready to go from our engineering facility to your K2. Now is your chance to get this awesome transmission cooler at a deep discount and prepare your K2 for a lifetime of hard work.
As always, feel free to let us know if you have any questions and thanks for reading!