– 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
SKU: WCF100469 Categories: ,  Brands:

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.

The WCFab Transmission Cooler Thermostat Bypass Plug is a quick and easy install and will work with the following range of GM vehicles equipped with a factory installed transmission cooler thermostat bypass:

  • 2017-2019 Chevrolet Silverado & GMC Sierra 2500HD/3500HD with 6.6L Duramax Diesel
  • 2014-2018 Chevrolet Silverado & GMC Sierra 1500 with 4.3L 6 Cyl, 5.3L 8 Cyl, and 6.2L 8 Cyl Gas Engines
  • 2015-2020 Chevrolet Suburban, Tahoe & GMC Yukon with 5.3L 8 Cyl, and 6.2L 8 Cyl Gas Engines
  • 2015 Cadillac Escalade with 6.2L 8 Cyl Gas Engine


WC Fab

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This product is designed and manufactured for use only on competition motor vehicles participating in sanctioned closed-course, off-road, competitive Racing. Use of this product on Motor Vehicles that are licensed and registered to drive on public roads and highways is prohibited. By accepting this you agree that this product will not be used on a registered motor vehicle for highway use. Also, agreeing to this you take for responsibility for your actions and not hold Blood Diamond Motorsports liable for unlawful use of this product.
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