Product Description
The REVMAX 478-920 Overdrive Direct Snap Ring is a precision-fit hard part designed for 46RH, 47RH, 47RE, and 48RE Dodge automatic transmissions found behind the legendary 5.9L Cummins. During any performance build or overhaul, retaining components properly in the overdrive section is critical — and this snap ring ensures secure clutch pack retention under demanding load.
Whether you’re refreshing a stock unit or assembling a high-performance diesel transmission, replacing worn or distorted snap rings is essential for long-term durability and clutch stability.
Why Replace the Overdrive Direct Snap Ring?
- Prevents clutch pack movement under high torque loads
- Restores proper overdrive section retention
- Ideal for rebuilds, performance builds, and heavy towing applications
- Direct-fit replacement for factory configuration
Fitment:
- 1994–1995 Dodge Ram 2500/3500 – 5.9L Cummins – 46RH / 47RH
- 1996–2002 Dodge Ram 2500/3500 – 5.9L Cummins – 47RE
- 2003–2007 Dodge Ram 2500/3500 – 5.9L Cummins – 48RE
| Specifications for REVMAX 478-920 | |
|---|---|
| UPC | Not Available |
| GTIN | Not Available |
| Shipping Info | Shipping Weight: Approx. 1 lb Package Dimensions: Small parcel component |
| Prop 65 | WARNING: Cancer & Reproductive Harm - www.P65Warnings.ca.gov |
FAQ
Is this snap ring compatible with both RH and RE transmissions?Yes. The RevMax 478-920 is designed for 46RH, 47RH, 47RE, and 48RE Dodge transmissions used behind Cummins engines from 1994–2007.
Should I replace the snap ring during every rebuild?
It is strongly recommended. Snap rings can lose tension or become distorted over time, especially in high-torque diesel applications.
Is this a direct factory replacement size?
Yes. This component is designed as a direct-fit overdrive direct snap ring for the listed Chrysler/Dodge transmissions.
Will this improve transmission holding power?
While it does not add friction capacity by itself, it ensures proper clutch pack retention, which is critical for durability under load.
