Dana 30 Front Axle Differential Parts

Know Your Dana 30 to Buy the Right Upgrade Parts Now

Here at Complete Off-Road, we help many shoppers looking for Dana 30 front axle parts — this includes differential parts, ring and pinion sets, and axle upgrades. Even though the Dana 30 has been around for well over 25 years, not all Dana 30s are compatible with the next. There are a number of brakes, hubs, differential orientations, wheel bolt patterns, and width specifications when it comes to dealing with the Dana 30.

This unit features an open knuckle design with a 7-1/5” ring gear. The ring and pinion ranges supported by the Dana 30 carriers are 2.72-3.54 and 3.73-5.38 for the standard rotation, and 2.72-3.54 and 3.73-4.56 for the reverse rotation units. Here are the distinctions between the carriers.

CJ Dana 30

The common gear ratios for the CJ Dana 30s are:

  • 3.73 for 1972-1975
  • 3.54 for 1976-1979
  • 2.73 for 1980-1986

All Dana 30s from 1972 through 1980 were made to use a six bolt locking hub. 1972 through 1978 units from the factory had Warn premium hubs as an option. From 1979 through 1980, the factory used Warn non-premium hubs. 1981-1986 models use a Warn five bolt locking hub.

Jeeps built during the 70s that have the Quadratrac transfer case will not have hubs, unless they were converted to part-time operation — those will have drive plates instead. The earlier models used a differential case that’s offset on the passenger side, and later models have case offset on the drivers side.

CJ Dana 30 units use a 5 on 5-1/2” wheel bolt pattern, while others use a 5 on 4-1/2” pattern. Outer parts can be swapped amongst different versions of the CJ Dana 30.

Wrangler Dana 30

YJ and TJ Dana 30s don’t use locking hubs. Wranglers also use a smaller rotor than the CJ. The TJ and YJ models also use a different pinion than each other.

A major strength of the YJ Dana 30 is that it uses a reverse cut ring and pinion, while the TJ does not. The TJ uses a similar ring and pinion to the CJ. YJ units also use an axle disconnect system.

YJ and TJ Dana 30 use the 5 on 4-1/2” bolt pattern. Also, the YJ Dana 30 is set up for leaf springs, and the TJ is setup for coils.

Comanche, Cherokee, and Grand Cherokee Dana 30

The Comanche and Cherokee use a reverse cut Dana 30, while the Grand Cherokee uses a normal cut until. All of these are setup for coil springs. Like the YJ and TJ, they use a 5 on 4-1/2” wheel bolt pattern.

Now that you’re able to identify the differences in the Dana 30 axles, you can upgrade them to make them stronger and more trail ready. Get all of your Dana 30 axle parts online like these front axle kits, or a set of new bearings and seals now.

Dana 30 Differential Parts, Ring and Pinion Gear Sets, and Axle Upgrades

Dana 30 Axle Models:

Dana 30 (Standard)
Dana 30CS (Crush Sleeve)
Dana 30HD (Heavy Duty)
Dana 30 JK Short Pinion (Jeep JK)
Dana 30 Short Pinion (Short Pinion)
Dana "Super" 30 (30 Spline)

Axle Specifications:

Ring Gear Diameter: 7.120
Diff Cover Bolts: 10
Ring Gear Bolts: 10
Axle Spline Count: 27 (30 on Super)
Axle Shaft Style: Full & Semi-Float
Pinion Support: No
Pinion Nut: 1-1/8"
Pinion Crush Sleeve: (Dana 30CS Only)
Carrier Breaks: 3.54 / 3.73
Dropout Carrier: No
Oil Type: 80W-90

Torque Specifications:

Pinion Preload New: 12 to 15 in-lbs
Pinion Preload Reused: 6 to 8 in-lbs
Ring Gear Backlash: .006" to .010"
Ring Gear Bolt Torque: 55 ft-lbs (JK:80)
Carrier Bearing Caps: 60 ft-lbs
Compatible Vehicles:

Ford Explorer 2002 - 2010 Front
Ford Ranger 2001 - 2005 Front
Ford Bronco 1966 - 1971 Front
Jeep Grand Cherokee 1992 - 1998 Front
Jeep JK Non-Rubicon 2007 - 2011 Front
Jeep TJ Wrangler 1997 - 2006 Front
Jeep XJ Cherokee 1996 - 2001 Front
Jeep CJ5 1974 - 1983 Rear
Jeep CJ6 1966 - 1975 Rear

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Axle Details

10 bolt cover used in many front applications. Has 27 spline axles, came in a variety of version using both standard and reverse rotation.