Mishimoto Transmission Upgrades

Adding horsepower to a diesel is easy — until the rest of the drivetrain starts to catch up. When you increase power and torque, your transmission is often the first component to show fatigue. That’s why Mishimoto has engineered a full line of transmission upgrades to help your Cummins, Powerstroke, or Duramax handle more power, run cooler, and last longer.

Take the 5.9L Cummins, for example — one of the most upgraded diesel platforms ever built. No matter which four-speed version you’re running — 518, 47RH, 47RE, or 48RE — they all share the same problems: weak torque converter lockup and overheating. Instead of waiting for a complete failure, adding a few key Mishimoto upgrades can dramatically extend transmission life and prevent costly rebuilds.

A deep transmission pan is one of the easiest and most effective upgrades, increasing fluid capacity and improving cooling. Pair it with a high-efficiency Mishimoto transmission cooler, and you’ll keep fluid temps under control — even when towing or tuned for performance. For newer diesel trucks, Mishimoto also offers bypass valve upgrades that replace factory systems prone to failure, ensuring continuous fluid flow and consistent cooling no matter the conditions.

Built with precision engineering and backed by Mishimoto’s Lifetime Warranty, these upgrades are designed for diesel enthusiasts who demand reliability and performance.

Why Choose Mishimoto Transmission Upgrades?

Reduce Overheating: Larger coolers and pans improve fluid circulation and cooling efficiency.
Extend Transmission Life: Lower temps prevent clutch wear and fluid breakdown.
Fix OEM Weak Points: Eliminate failure-prone bypass valves and weak stock coolers.
Easy Installation: Direct-fit components for most Cummins, Duramax, and Powerstroke trucks.
Backed by Warranty: Mishimoto’s lifetime guarantee ensures lasting peace of mind.

Popular Mishimoto Transmission Products

Deep Aluminum Transmission Pans
High-Capacity Transmission Coolers
Bypass Valve Upgrade Kits
Transmission Lines, Fittings & Hardware
Complete Cooling System Kits

Keep your transmission cool, strong, and dependable with Mishimoto transmission upgrades from Diesel Power Products. Prevent overheating, improve performance, and drive with confidence — built for serious diesel owners.

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