Product Description
The REVMAX 478-602 6 Pinion Steel Overdrive Planetary Gear Set is a critical durability upgrade for Dodge Cummins trucks equipped with the 47RH, 47RE, or 48RE automatic transmission. Factory transmissions typically use a 4 or 5 pinion planetary which can suffer from galling, excessive wear, and gear tooth failure under heavy diesel torque loads.
RevMax engineered this 6-pinion steel overdrive planetary gear set to dramatically increase load capacity and reliability while maintaining smooth and quiet operation. With a stronger gear arrangement and a 15-degree gear design, this planetary assembly distributes torque across more gears, reducing stress and improving overall transmission durability.
This kit is a direct drop-in replacement for 47RH and 47RE transmissions and can also replace the factory overdrive geartrain in a 48RE transmission, making it an excellent upgrade during performance builds or transmission rebuilds.
Key Features
- Upgraded 6 pinion steel planetary design
- Increased torque handling capacity vs factory 4-5 pinion assemblies
- Improves durability of the overdrive section
- 15° gear design for smooth and quiet operation
- Direct replacement for 47RH / 47RE transmissions
- Also replaces the factory overdrive geartrain in 48RE transmissions
What's Included
- 6 Pinion steel planetary assembly
- Ring gear
- Sun gear
- Bearing apply plate
- Bearing
Fitment
- 1990–1995 Dodge Ram – 5.9L Cummins – 47RH Transmission
- 1996–2002 Dodge Ram – 5.9L Cummins – 47RE Transmission
- 2003–2007 Dodge Ram – 5.9L Cummins – 48RE Transmission
- Fits Dodge Ram 2500 and Ram 3500 models
| Specifications for REVMAX 478-602 | |
|---|---|
| UPC | 193564521460 |
| GTIN | 193564521460 |
| Shipping Info | Estimated Shipping Weight: 10 lbs Package Dimensions: 14 in x 14 in x 8 in |
| Prop 65 | WARNING: Cancer & Reproductive Harm – www.P65Warnings.ca.gov |
FAQ
Why upgrade to a 6-pinion planetary gear set?The factory transmissions use a 4 or 5 pinion planetary which can fail under high torque diesel loads. A 6 pinion design spreads the load across more gears, significantly improving strength and durability.
Will this fit both 47RE and 48RE transmissions?
Yes. This gear set 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 performance or towing builds?
Absolutely. The increased load capacity makes this planetary gear set ideal for towing, heavy-duty work trucks, and high-horsepower Cummins builds.
Does the kit include the complete planetary assembly?
Yes. The RevMax 478-602 kit includes the planetary assembly, ring gear, sun gear, bearing apply plate, and bearing for a complete overdrive geartrain upgrade.
Is installation difficult?
Installation requires transmission disassembly. This part is typically installed during a transmission rebuild or performance upgrade by a qualified technician.
