Product Description
RevMax 478-602 6 Pinion Steel Overdrive Planetary Gear Set – 47RH / 47RE / 48RE – 1990-2007 Dodge Ram 5.9L Cummins
The RevMax 478-602 6 Pinion Steel Overdrive Planetary Gear Set is a critical transmission durability upgrade for Dodge Ram trucks equipped with 47RH, 47RE, and 48RE automatic transmissions. Designed to replace the factory 4-pinion or 5-pinion overdrive planetary assembly, the RevMax 6-pinion design significantly increases load capacity, improves reliability, and helps prevent common overdrive gear failures found in high-torque diesel applications.
Built from heavy-duty steel and utilizing a stronger 15-degree gear design, the RevMax 478-602 distributes load across more gear teeth for improved strength, quieter operation, and greater durability under towing, racing, and high-horsepower conditions. This direct drop-in assembly is an excellent upgrade during transmission rebuilds and performance builds for 5.9L Cummins-powered Dodge Ram trucks.
Features
- Heavy-duty 6-pinion steel overdrive planetary gear set
- Direct replacement for factory 4-pinion and 5-pinion planetary assemblies
- Increased torque handling capacity
- Reduces risk of gear tooth failure and overdrive section damage
- 15-degree gear design for smoother and quieter operation
- Direct drop-in installation for 47RH and 47RE transmissions
- Direct replacement overdrive geartrain for 48RE transmissions
- Ideal for towing, work trucks, performance builds, and transmission rebuilds
- Designed for high-torque diesel applications
- Manufactured by RevMax Performance Converters
Fitment
- 1990-1995 Dodge Ram 2500 & 3500 – 5.9L Cummins – 47RH Transmission
- 1996-2002 Dodge Ram 2500 & 3500 – 5.9L Cummins – 47RE Transmission
- 2003-2007 Dodge Ram 2500 & 3500 – 5.9L Cummins – 48RE Transmission
- Compatible with stock, towing, performance, and competition transmission builds
Note: Installation requires transmission disassembly and is recommended during transmission rebuilding or performance transmission upgrades. Professional installation is recommended.
What's Included
- 6-Pinion Steel Planetary Assembly
- Ring Gear
- Sun Gear
- Bearing Apply Plate
- Bearing
Specifications
- Manufacturer: RevMax
- Part Number: 478-602
- Product Type: Overdrive Planetary Gear Set
- Planetary Design: 6-Pinion Steel Construction
- Gear Design: 15-Degree Helical Gear Design
- Transmission Compatibility: 47RH, 47RE, 48RE
- Installation Type: Direct Drop-In Replacement
- Primary Benefit: Increased Load Capacity and Overdrive Durability
- Application: Dodge Ram 5.9L Cummins Diesel
- Material: Steel
- Recommended Use: Towing, Performance, Racing, and Heavy-Duty Applications
Cross Reference Numbers
478-602, REV478-602, RM478-602, 6 Pinion Overdrive Planetary, 47RH Planetary Upgrade, 47RE Overdrive Planetary, 48RE Overdrive Geartrain Upgrade, 193564521460
FAQ
Why upgrade to a 6-pinion planetary gear set?
Factory 47RH and 47RE transmissions often utilize 4-pinion or 5-pinion planetary assemblies that can wear, gall, or shed gear teeth under heavy torque loads. The RevMax 6-pinion design spreads the load across more gears, significantly improving strength and durability.
Will this fit both 47RE and 48RE transmissions?
Yes. The RevMax 478-602 is a direct drop-in replacement for 47RH and 47RE transmissions and can also replace the factory overdrive geartrain in 48RE transmissions.
Is this recommended for towing and performance applications?
Absolutely. The increased load capacity and stronger gear design make this planetary gear set an excellent upgrade for towing, work trucks, performance builds, and high-horsepower Cummins applications.
Does the kit include everything needed for the overdrive geartrain?
Yes. The kit includes the planetary assembly, ring gear, sun gear, bearing apply plate, and bearing for a complete overdrive planetary upgrade.
Is this a direct replacement?
Yes. The RevMax 478-602 is designed as a direct-fit replacement and requires no modifications to the transmission case or overdrive section.
When should this upgrade be installed?
This planetary gear set is commonly installed during transmission rebuilds, towing upgrades, performance transmission builds, or when repairing overdrive section failures.
