Wehrli WCF100469 Billet Anodized Transmission Cooler Thermostat Bypass Plug 2017-2019 L5P Duramax

SKU: wcfWCF100469
In stock - 79 items available
Regular price $59.17

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Verified Fitment & Application Support

This product is selected for proper fitment and compatibility with the listed engine application. Our team is available to assist with fitment questions, installation considerations, and supporting components to ensure a smooth install and reliable performance.

Billet Anodized Transmission Cooler Thermostat Bypass Plug 2017-2019 L5P Duramax, powder coated in Black. The stock thermostatic bypass for warming up the Allison quickly in cold weather conditions is a good idea in principle, but in practice we've seen the valve fail forcing trans fluid around the cooler in warm weather conditions that cause dangerous fluid temperatures for built and stock transmissions alike. We've been running this design on our shop development trucks and with our built transmissions successfully and are now making them available for purchase separately due to popular demand. Recommended for trucks with stock or built transmissions and performing heavy towing in warm climates to help keep fluid temperatures in check.

Key Features

  • CNC Machined Billet Aluminum Thermostatic Bypass Plug
  • Black Anodized Finish
  • High temperature silicone O-ring seals
  • Reduces fluid flow restriction to trans cooler
  • Simple Installation
  • Experience fluid temperature drops from 15-50 degrees F
  • Direct replacement of the failure prone OEM thermostat
  • Easy swap back to OEM setup for cold weather use

Fitment

  • 2017-2019 Chevrolet / GMC 2500 / 3500 HD 6.6L Duramax

Product Details

  • Brand: Wehrli Custom Fab (WCFab)
  • Manufacturer Part Number: WCF100469
  • Finish: Anodized Black
  • Made in the USA

Orders typically ship within 24–48 hours of being received, but because of vendor shipping times some orders may take longer. We ship within the United States only (48 contiguous states plus DC).

Shipping Height: 1.0

Shipping Length: 11.0

Shipping Width: 9.0

California Proposition 65
WARNING: This product can expose you to chemicals that are known to the State of California to cause cancer and/or reproductive harm. For more information, visit www.P65Warnings.ca.gov.