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