RevMax 68RFE ZeroStat Transmission Cooler Thermostatic Bypass (2019+)
Description:
The RevMax ZeroStat Bypass is a fully re-engineered billet aluminum cooler bypass designed to eliminate the factory restriction and failure-prone thermostat found on 2019+ 68RFE-equipped Rams.
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Removes all internal restrictions for 100% cooler flow at all times
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Built from 6061 billet aluminum for strength and durability
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Dramatically lowers transmission temperatures
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Helps prevent bypass valve failure that leads to overheating
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Ideal for high-performance, towing, and tuned applications
Note: Offers the highest unrestricted flow on the market—87% more flow than stock
ATS Thermal Bypass Delete Kit (68RFE & Aisin AS69RC)
Description:
ATS solves a major design flaw in the factory transmission cooling system. Their bypass delete ensures 100% of transmission fluid is routed through the cooler at all times.
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Fits 2019–2024 Ram trucks with 68RFE or Aisin AS69RC
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Eliminates the thermal bypass valve completely
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Ensures maximum transmission cooling and protection
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Prevents overheating caused by stuck or leaking bypass valves
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CNC machined billet aluminum components
Includes:
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ATS Billet Thermal Bypass Block
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Cooler Block Clamp Plate
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Billet Filter Coupler (68RFE)
BD Diesel Cooler Bypass Delete (68RFE & Aisin)
Description:
The BD Diesel Thermal Bypass Delete keeps your transmission cooler 100% operational at all times, eliminating the risk of overheating from a stuck stock valve.
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Ensures full-time cooler flow
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Prevents overheating from stuck bypass valves
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Built for durability and reliability
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No tuning required
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Quick installation (30 minutes or less)
Fits: 2019–2024 Ram 6.7L Cummins with 68RFE or Aisin AS69RC
PPE Transmission Fluid Thermal Bypass Valve (Billet Aluminum)
Description:
PPE’s Thermal Bypass Valve is a high-flow, billet aluminum replacement for the factory thermostat. It removes the OEM restriction and adds extra filtration protection via a magnetic plug.
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Deletes the stock thermostat for full-time cooler flow
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Magnetic service plug captures debris in fluid
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CNC-machined 6061 billet aluminum with polished finish
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Drop-in install with no tuning or modifications
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Works with both gas and diesel Ram models
Fitment:
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2019–2024 Ram 2500/3500 6.7L Cummins (68RFE & Aisin AS69RC)
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6.4L & 5.7L HEMI (65RFE, 66RFE, 545RFE)
Mishimoto Thermal Bypass Valve – Black (2019+ 6.7L Cummins)
Description:
The Mishimoto Thermal Bypass Valve improves fluid flow and reliability. It includes a replaceable thermostat that opens earlier and an optional full-flow bypass for hot climates or towing.
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Opens ~10°F sooner than OEM
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Includes full-flow bypass plug for summer/heavy-duty use
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CNC-machined aluminum with cooling fins
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Black anodized finish for durability and heat dissipation
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No permanent modifications required
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Backed by Mishimoto Lifetime Warranty
Mishimoto Full-Flow Thermal Bypass Valve – Silver (2019+ 6.7L Cummins)
Description:
This version eliminates the thermostat completely for constant cooler flow under all conditions—ideal for hot climates, heavy towing, and tuned builds.
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No thermostat = full-time flow
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Optimized internal channels for unrestricted cooling
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Cooling fins machined into body for added heat reduction
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CNC-machined billet aluminum with silver finish
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Mishimoto Lifetime Warranty