SHOP BY CATEGORY

Interior Interior Interior
Exterior Exterior Exterior
Performance Performance Performance
Lighting Lighting Lighting
Repair Repair Repair
Wheels & Tires Wheels & Tires Wheels & Tires
Tools & Garage Tools & Garage Tools & Garage
Brands Brands Brands

SHOP BY BRAND

DEALS & OFFERS


RESET

SAVE

SHOPPING CART

Subtotal:

You have no items in your shopping cart.

Transmission Thermal Bypass Valve Kit <br> 17-19 Chevy Silverado GMC Sierra 2500 3500 HD
Transmission Thermal Bypass Valve Kit <br> 17-19 Chevy Silverado GMC Sierra 2500 3500 HD
Transmission Thermal Bypass Valve Kit <br> 17-19 Chevy Silverado GMC Sierra 2500 3500 HD
Transmission Thermal Bypass Valve Kit <br> 17-19 Chevy Silverado GMC Sierra 2500 3500 HD
Transmission Thermal Bypass Valve Kit <br> 17-19 Chevy Silverado GMC Sierra 2500 3500 HD
MISHIMOTO
®

Transmission Thermal Bypass Valve Kit
17-19 Chevy Silverado GMC Sierra 2500 3500 HD

SKU: MIS-MMTC-L5P-TBV
$147.95

Availability: Out Of Stock

Compatibility
Specification
Product Description Reviews
Description:

The Allison transmission is the backbone of your L5P Duramax. It's responsible for transmitting large quantities of torque from your V8 diesel powerplant. This torque generates a lot of heat, and if that heat isn't dissipated, it can destroy your transmission. The transmission cooler does a good job of keeping trans fluid temperatures in check, but only if the fluid can reach it. The stock cooling system of the Allison 1000 transmission utilizes an in-line thermal bypass valve that controls fluid flow to the transmission cooler. The purpose of this valve is to prevent transmission fluid from flowing to the cooler until it reaches operating temperature. The thermostat inside this valve is prone to failure, however, and when that happens, the fluid never flows to the cooler, and the transmission can overheat. That's why Mishimoto has developed a thermal bypass valve upgrade for your 2017-2019 Chevrolet/GMC 6.6L Duramax. Our CNC-machined aluminum thermal bypass valve not only looks better than the stock unit, but it performs better too. This Mishimoto thermal bypass valve kit includes a fully serviceable thermostat for fast warm-up in cold climates. This kit also includes a thermostat bypass that can be installed to provide constant cooling in warm climates or for use in extreme driving/towing conditions. The Mishimoto thermal bypass valve features strategically machined internal passages, providing improved flow over the stock valve for more effective cooling. In addition, cooling fins machined into the valve body adds even more heat dissipation. This 2017-2019 Chevrolet/GMC 6.6L Duramax L5P Thermal Bypass Valve Kit is built to last a lifetime with a durable black anodized finish and our Mishimoto Lifetime Warranty.

Features:

  • Direct fit for 2017-2019 Chevrolet/GMC 6.6L Duramax L5P
  • Installs in less than 1 hour
  • Eliminates failure-prone bypass valve
  • Durable CNC-machined billet aluminum construction
  • Includes fully-serviceable thermostat for fast warm-up in cold climates and thermostat bypass for constant cooling in hot climates
  • Helps extend transmission life and prevent overheating
  • Fits with stock transmission cooler piping, requiring no modification for installation
  • Integrated heat-sink fins provide unique styling and added heat dissipation
  • Durable anodized finish


  • Package Includes:

  • (1) CNC-Machined Billet Aluminum Thermal Bypass Valve
  • (1) Removable Thermostat
  • (2) 7/8-inch X 14 Quick-Disconnect Transmission Line Fittings
  • (1) Transmission Line Mounting Plate
  • (1) Transmission Line Mounting Plate Bolt
  • (1) Removable Thermostat Bypass w/ Installation Hardware
  • (1) Assembly Notecard


  • Compatible With:

  • 2017-2019 GMC Sierra 3500 HD Sierra 2500 HD 6.6L
  • 2017-2019 Chevrolet Silverado 2500 HD Silverado 3500 HD 6.6L


  • WARNING: This product contains chemicals known to the State. For more information go to https://www.p65warnings.ca.gov/