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The Mishimoto Full-Flow Transmission Thermal Bypass Valve Kit is designed specifically for your 2013-2018 Dodge Ram 2500 and 3500 with 6.7L Cummins engines. This upgrade enhances transmission cooling efficiency by replacing the factory-installed thermal bypass valve, which is prone to failure and can cause overheating due to restricted fluid flow. By eliminating the internal thermostat, this kit ensures that transmission fluid always reaches the cooler, even during cold starts or heavy-duty towing, helping to extend the lifespan of your transmission and maintain optimal performance. Crafted from CNC-machined billet aluminum, the valve boasts a sleek silver anodized finish that resists corrosion and wear, ensuring durability over years of rigorous use. Strategically machined internal passages improve flow over the stock valve, and integrated cooling fins further assist in heat dissipation, making this an ideal solution for owners in warm climates, heavy-towing applications, or those seeking the best possible transmission cooling. The installation process is straightforward, typically completed in less than an hour, and the kit comes with all necessary hardware for a secure fit. Backed by Mishimoto's lifetime warranty, this full-flow bypass valve kit provides an effective, reliable upgrade that enhances your truck’s cooling system and helps prevent costly transmission damage. Whether for daily driving, towing, or off-road adventures, this upgrade ensures your transmission remains cool and functioning at peak efficiency, giving you peace of mind on every journey.
Features:
Fitment:
2013 Ram 2500 Big Horn
2013 Ram 2500 Laramie
2013 Ram 2500 Laramie Longhorn
2013 Ram 2500 Lone Star
2013 Ram 2500 Outdoorsman
2013 Ram 2500 Power Wagon
2013 Ram 2500 SLT
2013 Ram 2500 ST
2013 Ram 2500 Tradesman
2013 Ram 3500 Big Horn
2013 Ram 3500 Laramie
2013 Ram 3500 Laramie Longhorn
2013 Ram 3500 Lone Star
2013 Ram 3500 SLT
2013 Ram 3500 ST
2013 Ram 3500 Tradesman
2014 Ram 2500 Big Horn
2014 Ram 2500 Laramie
2014 Ram 2500 Laramie Limited
2014 Ram 2500 Laramie Longhorn
2014 Ram 2500 Lone Star
2014 Ram 2500 Outdoorsman
2014 Ram 2500 Power Wagon
2014 Ram 2500 SLT
2014 Ram 2500 Tradesman
2014 Ram 3500 Big Horn
2014 Ram 3500 Laramie
2014 Ram 3500 Laramie Limited
2014 Ram 3500 Laramie Longhorn
2014 Ram 3500 Lone Star
2014 Ram 3500 SLT
2014 Ram 3500 Tradesman
2015 Ram 2500 Big Horn
2015 Ram 2500 Laramie
2015 Ram 2500 Laramie Limited
2015 Ram 2500 Laramie Longhorn
2015 Ram 2500 Lone Star
2015 Ram 2500 Outdoorsman
2015 Ram 2500 Power Wagon
2015 Ram 2500 SLT
2015 Ram 2500 Tradesman
2015 Ram 3500 Big Horn
2015 Ram 3500 Laramie
2015 Ram 3500 Laramie Limited
2015 Ram 3500 Laramie Longhorn
2015 Ram 3500 Lone Star
2015 Ram 3500 SLT
2015 Ram 3500 Tradesman
2016 Ram 2500 Big Horn
2016 Ram 2500 Laramie
2016 Ram 2500 Laramie Longhorn
2016 Ram 2500 Limited
2016 Ram 2500 Outdoorsman
2016 Ram 2500 Power Wagon
2016 Ram 2500 SLT
2016 Ram 2500 Tradesman
2016 Ram 3500 Big Horn
2016 Ram 3500 Laramie
2016 Ram 3500 Laramie Longhorn
2016 Ram 3500 Limited
2016 Ram 3500 SLT
2016 Ram 3500 Tradesman
2017 Ram 2500 Big Horn
2017 Ram 2500 Laramie
2017 Ram 2500 Laramie Longhorn
2017 Ram 2500 Limited
2017 Ram 2500 Power Wagon
2017 Ram 2500 SLT
2017 Ram 2500 Tradesman
2017 Ram 3500 Big Horn
2017 Ram 3500 Laramie
2017 Ram 3500 Laramie Longhorn
2017 Ram 3500 Limited
2017 Ram 3500 Lone Star
2017 Ram 3500 SLT
2017 Ram 3500 Tradesman
2018 Ram 2500 Big Horn
2018 Ram 2500 Laramie
2018 Ram 2500 Laramie Longhorn
2018 Ram 2500 Limited
2018 Ram 2500 Power Wagon
2018 Ram 2500 SLT
2018 Ram 2500 Tradesman
2018 Ram 3500 Big Horn
2018 Ram 3500 Laramie
2018 Ram 3500 Laramie Longhorn
2018 Ram 3500 Limited
2018 Ram 3500 SLT
2018 Ram 3500 Tradesman
Order Processing
All orders are processed and shipped within 24 hours of purchase (excluding weekends and holidays).
Orders placed after 3:00 PM EST may ship the following business day.
Shipping Methods
Customers select their preferred shipping method and speed at checkout.
Shipping times are determined by the carrier and cannot be guaranteed by us.
Tracking information will be provided once your order has shipped.
Shipping Coverage
If your package arrives damaged, please notify the delivery driver immediately and contact the shipping carrier to file a claim.
You must report any missing or damaged items within 14 days of delivery.
After this time, we cannot be held responsible for lost or damaged items.
Return Window
You have 30 days from the date of delivery to request a return.
After 30 days, we are unable to accept returns, exchanges, or refund requests.
Eligibility
Items must be returned in their original condition—unused, unwashed, and with all tags and packaging intact.
Certain products may not be eligible for return (e.g., special-order items, customized products, or perishable goods).
Items that have been altered, installed, or modified cannot be returned.
Return Process
Contact our Customer Support team to request a Return Authorization (RMA) before sending items back.
Once your return is approved, you’ll receive instructions on where to send the product.
Customers are responsible for return shipping costs unless the item was defective or incorrect.
Refunds
Refunds are issued to the original payment method once the returned item has been received and inspected.
Please allow 5–10 business days for the refund to appear on your account.
In some cases, a restocking fee may apply (if applicable, this will be disclosed during your return authorization).
