Revolution Gear & Axle 03-10 Dodge 2500/3500 11.5in-9.25in Reverse Cut 4.56 Ratio Gear Package
A 2003-2010 Dodge Ram 2500 or 3500 that now runs 35-inch tires, a camper or a heavy gooseneck often ends up feeling underpowered and working its transmission hard. This Revolution Gear & Axle package (part number REV-DODGE-2500/3500-456) changes both axles to a 4.56 ratio: a ring and pinion for the 11.5-inch rear, a reverse-cut ring and pinion for the 9.25-inch front, and a master install kit for each.
These heavy-duty Rams use an 11.5-inch rear axle (Revolution lists it as the GM 11.5 design) and a 9.25-inch front on 4x4 trucks. Revolution specifies a 30-spline pinion in both axles. The front gear is reverse cut because the front differential is driven from the opposite side of the ring gear, so a standard-rotation 9.25 set will not work in it. The ring and pinion sets the final drive ratio. Moving to 4.56 multiplies torque at the wheels, which Revolution notes makes heavy loads easier to pull at lower speeds without straining the engine, and it puts engine RPM back where it belongs after a tire size increase.
On these trucks, a lot of what owners call transmission trouble while towing is really a gearing mismatch, and a lot of axle whine gets blamed on the transmission. Our 48RE whine and clunk diagnosis guide helps separate transmission noise from axle noise on Cummins trucks, and the 48RE gear ratio guide shows how axle ratio and tire size change engine RPM at highway speed. Check the axle tags or count the ring and pinion teeth so you know your current ratio before choosing 4.56.
This package is listed for 2003-2010 Dodge and Ram 2500/3500 trucks with the 11.5-inch rear and 9.25-inch reverse-cut front. Two-wheel-drive trucks have no front differential and only need the rear gear set, so a full package is for 4x4 trucks. Confirm the 11.5 rear and 9.25 front on your axle tags before ordering, or send us your year and VIN and we will check fitment. Newer trucks need a different package; we also carry a 2014-18 Ram 2500/3500 4.56 package. More axle parts are in our rebuild kits category.
Each axle needs pinion depth, pinion preload, backlash and carrier preload set and checked against a marking-compound pattern. The master install kits supply the bearings and setup parts; Revolution kits use Timken or Koyo bearings depending on the part number. While the rear is apart, a 11.5 rear wheel bearing and seal kit is cheap insurance, and a worn front 9.25 front pinion yoke should be replaced if the seal surface is grooved.
Revolution's break-in calls for 80W-90 or 85W-140 non-synthetic GL5 gear oil, short heat cycles with cool-downs, no towing until after the 500 mile gear oil change, and first tows of under 15 miles at a time with cool-downs between. If your axle has a clutch-type limited slip, add friction modifier as its maker specifies. Recalibrate the speedometer for the new ratio so the transmission shifts on the correct output speed.
| Brand | Revolution Gear & Axle |
| Part number | REV-DODGE-2500/3500-456 |
| Fits | Revolution Gear & Axle 03-10 Dodge 2500/3500 11.5in-9.25in Reverse Cut 4.56 Ratio Gear Package |
| Vehicle fitment | Dodge 2500/3500 11.5In-9.25In Reverse Cut (2003-2010) |
| Type | Differential Install Kits |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
Only the rear half applies. Two-wheel-drive trucks have no front differential, so the front 9.25 reverse-cut gear set and its kit would not be used.
The 9.25 front differential turns the ring gear in the opposite direction from a rear axle, so it needs a reverse-cut gear set to run quietly and carry load on the correct side of the teeth.
No. Revolution says no towing before the 500 mile gear oil change, and the first tows after that should be under 15 miles with cool-downs in between, repeated two or three times.
Revolution recommends 80W-90 or 85W-140 non-synthetic GL5 or higher. Add friction modifier if the axle has a clutch-type limited slip.
This package is listed for 2003-2010. Later trucks have their own packages, so match your axle tag or send your VIN before ordering.
