Pacific Performance Engineering ATF Thermal Bypass Valve for Ram 2500/3500 (2019–2024) — Billet Aluminum, Magnetic Plug

The PPE Automatic Transmission Fluid Thermal Bypass Valve replaces the restrictive factory valve to maximize cooler flow and includes a removable neodymium magnet service plug for trapping ferrous debris.

Ram 2500 and 3500 trucks with 5.7L, 6.4L, or 6.7L engines rely on steady ATF circulation to keep transmission temperatures in check during towing and heavy-duty use. The original equipment valve can develop internal restrictions or seize closed, reducing or blocking fluid flow to the cooler. PPE designed this billet-aluminum replacement to restore full flow, reduce the risk of high fluid temperatures, and make routine debris checks simple with a magnetic service plug.

How does this valve improve transmission cooling under load?

The PPE bypass valve removes the OEM’s extremely limited internal passages that restrict circulation when compared to a full-flow design. By providing a less restrictive path, more ATF reaches the external cooler, helping the system shed heat more effectively during towing, steep grades, or stop-and-go driving.

• Billet-aluminum body for reliable flow characteristics and durability.
• Direct-fit replacement for 2019–2024 Ram 2500/3500 with listed engines.
• Restores near-unrestricted fluid routing to the cooler under heavy demand.

What does the neodymium magnet service plug do and why it matters?

PPE added a removable service plug with a strong neodymium magnet to capture ferrous particles that circulate in the ATF. This trapped debris can be pulled out during maintenance, reducing the amount of metal particulate recirculating through valve passages and cooler cores—something the factory valve does not offer.

• Magnet traps metallic debris to help protect valve passages and cooler passages.
• Removable plug with O-ring for clean, tool-friendly inspection and removal.
• Simple preventive maintenance step during fluid service intervals.

Is installation straightforward and which models fit?

The PPE valve is engineered as a direct replacement for OEM Part# 68359848AD and fits 2019–2024 Ram 2500/3500 applications with compatible automatic transmissions and 5.7L, 6.4L, and 6.7L engines. Installation is intended to match the factory location and connections; basic mechanical skills and standard tools are all that’s typically needed.

• Direct-fit for specified Ram 2500/3500 model years and engines.
• Uses stock mounting points and fluid ports for straightforward swap.
• Billet construction resists corrosion and handles service routines.

Will this change how I maintain my transmission?

The valve itself does not alter OEM fluid types or service intervals, but the magnetic service plug gives you a quick visual check for ferrous debris at fluid service. If metal particles are present, removing and inspecting the plug helps diagnose premature wear or contamination and informs whether additional inspection or transmission service is warranted.

• Kept maintenance procedures intact—no fluid type changes required.
• Magnet plug provides an easy, non-invasive spot-check for debris.
• Encourages proactive checks when towing or under heavy use.

Who is this for: Owners and operators of 2019–2024 Ram 2500 and 3500 trucks who tow, haul, or run heavy-duty driving cycles and want a durable, higher-flow replacement for the restrictive OEM thermal bypass valve. It’s geared toward DIY installers, professional shops, and fleet managers seeking improved cooler flow and a built-in way to trap and inspect ferrous contamination without modifying the transmission’s original fluid specifications.