Revolution Gear & Axle Dana 44 Thick Gear Rear Axle 4.56 Ratio Dual Drilled Ring & Pinion Set
A 4.56 ratio is where a lot of Jeep, Bronco, Blazer and Ram owners end up after moving to 35 in. tires, because it brings cruising rpm and low-speed crawl back close to where the factory had them. The catch is that most of those axles came with a 3.73-or-lower ratio, and the carrier that holds the ring gear was built for that range. The Revolution Gear & Axle D44-456TD solves that: it is a thick 4.56 ring and pinion for the standard-rotation Dana 44 that bolts to the 3.73-and-down carrier, so you can keep a good carrier, limited slip or locker. It is new, not a used or reground set.
In a 4.56 set the pinion head is noticeably smaller than in a 3.73 set, so the ring gear has to sit closer to the pinion centerline. Dana handled that by building a second carrier series, with a different ring gear mounting position, for 3.92 and deeper ratios. A thick ring gear builds that difference into the gear itself. Revolution gives this set's carrier break as 3.73/3.92, with an 8.5 in. ring gear, a 26-spline pinion, standard rotation and an 8620 steel gear made in Korea. The ring gear is dual drilled for 10 bolts in either 3/8 in. or 7/16 in. size, which covers older and newer carriers. Compared with a 3.73, a 4.56 multiplies torque about 22 percent more, which roughly offsets a jump from 29 in. to 35 in. tires.
Count the teeth or read the axle tag to learn your current ratio, then confirm the carrier series; a 4.56 thick gear is wrong for a carrier already set up for 3.92 or deeper. If your carrier is that later type, the standard-thickness Yukon YG D44-456 is the one to buy. Our regear after bigger tires guide helps confirm 4.56 is the right ratio for your tire, engine and transmission, and the Dana 35 vs Dana 44 comparison helps if you are not sure which rear axle a Jeep has.
This is a rear-axle, standard-rotation Dana 44 gear for the 3.73-and-down carrier. Revolution's fitment table for its thick gear family includes the 1997-2006 Wrangler, 1986-1993 Cherokee and Comanche, CJ5, CJ6, CJ7 and Scrambler, full-size Wagoneer and J10, 1966-1971 Jeepster, early Bronco, K5 Blazer, and 1994-2002 Ram 1500 and 2500. Many of those vehicles were built with more than one rear axle, so the Dana 44 has to be confirmed on your vehicle, and the high-pinion reverse-rotation fronts and the JK and JL rear 44s take different gears. Give us your year, VIN and axle tag and we will check it before it ships.
If you are on 33s, the 4.10 thick set may suit better; for 37s and up, see the 4.88 thick set.
| Brand | Revolution Gear & Axle |
| Part number | D44-456TD |
| Fits | Revolution Gear & Axle Dana 44 Thick Gear Rear Axle 4.56 Ratio Dual Drilled Ring & Pinion Set |
| Type | Ring & Pinions |
| 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.
Yes, with this thick gear. Revolution lists the D44-456TD for the 3.73-and-down carrier (carrier break 3.73/3.92). A standard 4.56 set would need a 3.92-and-up carrier.
It is the most common choice for a Dana 44 vehicle on 35s, because going from a 3.73 to a 4.56 roughly cancels the change from a 29 in. to a 35 in. tire. Automatic versus manual, engine and how you use the vehicle can move that, so check the numbers before ordering.
Yes. On a 4x4 the front and rear ratios must be the same, or the drivetrain will bind in four-wheel drive. Regear the front axle to 4.56 at the same time with gears made for that front axle.
The gear is dual drilled for 3/8 in. and 7/16 in. bolts. Use new bolts in the size your carrier is drilled for, and torque them to spec with thread locker.
Use 75W-90 or 75W-140 gear oil, with friction modifier if the carrier is a clutch-type limited slip. Drive gently for the first miles with cool-down stops, avoid towing early, and change the oil early.
