Yukon Gear High Performance Replacement Gear Set For Dana 30 in a 4.11 Ratio
The YG D30-411 is the gear set CJ owners look for when they move to 31 or 33 in. tires and the Jeep starts lugging on grades, or when an old front axle whines on the highway with the hubs locked. It is a new Yukon Gear & Axle 4.11 ring and pinion for the standard-rotation Dana Spicer 30 front axle, the low-pinion design found under the 1971-1986 CJ5 and CJ7, Scrambler, International Scout and Scout II, early Ford Bronco and Jeepster Commando.
In a standard-rotation Dana 30, the pinion enters below the axle centerline and turns a 7.20 in. ring gear the same direction a rear axle does. Yukon specifies this set with a 26-spline pinion and 10 ring gear bolts. This version of the axle sets pinion bearing preload with a solid shim stack instead of a crush sleeve, which is why the listing says the gears fit the Dana 30 without crush sleeve. At 4.11, the pinion turns 4.11 times for each turn of the front wheels. Going from a common 3.54 to 4.11 adds about 16 percent more torque at the tires, enough to give back what a jump from stock tires to 31-33 in. tires takes away.
Read the axle tag or count ring and pinion teeth to learn your current ratio, and check the rear axle ratio, because front and rear must match exactly. Make sure your axle is a standard-rotation Dana 30 and not a reverse-cut or short-pinion version: a low pinion entering below center on the passenger side is the standard design. The Dana 30 vs Dana 44 guide and the axle ratio and code guide show how to identify the housing and ratio.
Listed applications include the 1971-1983 CJ5, 1971-1975 CJ6, 1976-1986 CJ7, 1981-1985 Scrambler, 1967-1974 Scout and Scout II, 1966-1971 Bronco and 1967-1973 Jeepster Commando and Wagoneer with the Dana 30 front. It does not fit the YJ Wrangler front, which takes a reverse-rotation set, the late Cherokee XJ and TJ short-pinion axle, which takes the Dana 30 short pinion 4.11 set, or the JK and JL reverse-rotation fronts. Catalog lists for older axles vary, so match your axle tag and pinion design or send us your year and VIN.
The carrier matters too. Dana 30 carriers are split by ratio, and a 4.11 ring gear needs the 3.73-and-numerically-higher carrier. An axle that came with 3.54 or lower gears needs a new carrier, such as the Yukon open carrier case for Dana 30 3.73-up, or a locker made for that break like the Grizzly Locker for 27-spline Dana 30.
Replace every bearing with the gears; the Yukon YK D30-F master overhaul kit covers the standard-rotation Dana 30. Yukon's setup chart lists a 0.065 in. starting pinion shim, 12-15 in-lb of pinion preload with new bearings and 60 ft-lb on the bearing caps. Set pinion depth first, then preload with shims, then backlash, and read the drive and coast pattern with marking compound before the cover goes on. A Dana 30-80 housing spreader makes carrier removal and shim setting much easier. Fill with 75W-90 GL-5 gear oil and follow a gentle break-in procedure with an early oil change.
| Brand | Yukon Gear & Axle |
| Part number | YG D30-411 |
| Fits | Yukon Gear High Performance Replacement Gear Set For Dana 30 in a 4.11 Ratio |
| Type | Final Drive Gears |
| 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.
No. YJ front Dana 30 axles take a reverse-rotation gear set. This YG D30-411 is for the standard-rotation Dana 30 under CJ, Scout, early Bronco and similar vehicles.
No. Dana 30 carriers are split by ratio, and 4.11 needs the 3.73-and-up carrier or a locker made for that range.
It is a common choice for 31 to 33 in. tires on a CJ or Scout with a stock-type engine, and it must match the rear axle ratio exactly.
No. It is the ring and pinion only. Add a master overhaul kit with bearings, races, shims, seal and ring gear bolts.
75W-90 GL-5 gear oil. Change it after the first few hundred miles to flush out break-in wear.
