2007.5-2018 Cummins 6.7L RevMax 68RFE 300M One Piece Forged Billet Overdrive Clutch Hub & Shaft Assembly (68RFE-502)
RevMax products are special order, please contact us before ordering to get a timeline.
- Overview
- Features
- Specs
- Fits
We are proud to present the strongest and only true billet forged overdrive clutch hub for the 68RFE. Our shaft fits ALL 68RFE’s both stock and aftermarket from 2008-2019! Unlike the competition who start with an OEM shaft, cryogenically treat, shot peen and tap it with a magic wand; our shaft is truly stronger. Not just in words but in real life physics and testing!
The stock hub and shaft is made of 4130 steel. Our hot forged billet shaft is made of 4340M/300M steel. There is no comparison ins strength between the two metals. Please read the chart below to see for yourself. Our base material is nearly 100% stronger than that of the OEM base shaft. No hocus pocus cryogenic heat treat and shot peening process will get you anywhere near what our material difference does.
- Ability to run full thickness pressure plates while increasing clutch capacity by 28%
- Up to 50% more clutch capacity when using the industry standard .100” machined OD/Rev pressure plate.
- Longer clutch hub length allowing the installation of up to 20 single sided or 8 double sided frictions.
- One piece design that eliminates the weld from failing
- 4340M/300M billet hot forged material that is nearly 100% stronger than the OEM shaft
- Precision ground bushing surfaces
- Shot Peened lubrication holes to stop any stress cracks from forming
- Can be installed in a 100% OEM stock transmission without ANY modifications or into a transmission that incorporates any current aftermarket drum assembly.
| Material | Tensile Strength | Yield Strength |
|---|---|---|
| 4130 Steel | 97,200 PSI | 63,100 PSI |
| 4340/300M Steel | 280,000 PSI | 230,000 PSI |
| Strength Difference in % | 96.92% | 113.88% |
| Shaft | Torque Before Breaking | Strength increase vs OEM |
|---|---|---|
| OEM | ||
| Competitor’s OEM cryogenically treated and shot peened | ||
| Revmax 300M Forged |
| Friction Setup | OD/Reverse Pressure Plate | % Increase over OEM clutch surface area |
|---|---|---|
| 16 Single Sided | Full Thickness, .365” Thick | 28.5% |
| 18 Single Sided | .265” thick machined pressure plate | 40% |
| 20 Single Sided | .265” thick machined pressure plate | 50% |
| 6 Double Sided w\ 5 .067” Steels | Full Thickness, .365” Thick | 0% |
| 7 Double Sided w\ 6 .067” Steels | .265” thick machined pressure plate | 28.5% |
| 8 Double Sided w\ 7 .067” Steels | .180” thick machined pressure plate | 40% |
Dodge Cummins
2007.5 - 2018
Shipping
Most orders are shipped 1-2 weekdays after an order is placed, depending on availability. Some products are shipped directly from manufacturers.
Availability
Not all products are stocked in house. Please check for availability as some products may be backordered.
