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Cherokee XJ axles

Dana 30 up front; Dana 35, Chrysler 8.25 and the South American Dana 44 out back

Under the Cherokee sit solid iron axles, simple and very strong — part of why it's so good stock and so easy to build. Up front it's always a Dana 30; at the rear, depending on market and year, a Dana 35, a Chrysler 8.25… or the coveted Dana 44.

Front: Dana 30

The front axle is a Dana 30, a well-known, capable beam that handles tires up to 33" without drama and, with upgraded shafts and good u-joints, even more. It's one of the most supported axles on the planet: gears, lockers and reinforcements are everywhere.

Rear (U.S.): Dana 35 and Chrysler 8.25

In the U.S., the rear axle was almost always a Dana 35 (a c-clip unit): fine stock, but the typical weak point once you fit big tires or add a locker. The stronger option was the Chrysler 8.25" (with 29-spline shafts), notably tougher and prized as a street axle.

A note: between 1987 and 1990 a rear Dana 44 was also a factory option on some U.S. XJs. It then vanished from the North American market… but not from the south.

The South American Dana 44 (and the Córdoba car)

Here's the little-known gem: XJs assembled in South America came with a Dana 44 rear axle, bigger and stronger than the Yanks' Dana 35, and with a limited-slip (Trac-Lok / LSD) differential. It's well documented on the Venezuelan-built XJs, and confirmed too by owners of Cherokees built in Ferreyra, Córdoba, whose cars carry a factory Dana 44 with limited slip.

For those in the know, that's a jackpot: it means many South American XJs start life with a rear axle that stateside owners had to hunt down or swap in. One more reason to love the Córdoba car.

The fine print: in Venezuela the Dana 44 was almost universal across production; on the Córdoba cars it shows up mainly on the last units (1999–2000), while much of the earlier local assembly ran the Dana 35. It's a 30-spline Dana 44 with Trac-Lok and a ratio close to 3.07. And it isn't unique to the XJ: Jeep itself documented that the Córdoba-built Grand Cherokee ZJ V8 also offered a factory rear Dana 44. And a detail that clears up confusion: several of these units carry factory ABS mounted on the Dana 44 itself, so on a Córdoba car ABS does not give away a Dana 35 the way it does on the Yanks.

Upgrades for big tires

If yours has a Dana 35 and you're going to big tires, the classic routes are a Ford 8.8 swap (cheap, strong, with disc brakes), a Dana 44, or full-size axles at 37"+. And whatever axle you run, match it with the right gear ratio.

Axle swaps and identification

To pick a good replacement or upgrade rear axle, the table rules. One detail that simplifies everything: every XJ is 5×4.5" (5×114.3), front and rear, across the whole run, so bolt pattern is never the problem —what changes is width, splines and spring perches.

To tell what you've got without opening anything, the sign that rules is the diff cover, not the ABS: the Dana 35 has a round, smooth cover (~7.6" ring gear, rubber plug, 27 splines); the Chrysler 8.25 looks similar but has a 3-to-4" flat along the bottom (8.25" ring gear); and the Dana 44 wears an angular/hex cover with a threaded steel plug (8.5" ring gear, 30 splines, the biggest of the three). That's the test that never fails.

And mind the ABS myth. In the U.S. nearly every XJ with ABS carried a Dana 35 —the American 8.25 was rarely offered with ABS— hence the «ABS = Dana 35» shortcut. But it's no law: some 8.25s had ABS in later years and, above all, South American XJs —the Córdoba 1999–2000 cars included— run a Dana 44, many with factory ABS (the tone ring sits on the Dana 44 itself). If you've got a late Córdoba car with ABS, it's a Dana 44: check the cover.

Two fine points on the 8.25: it changed shafts in 1997 —through 96 they were 27-spline and from 97 to 01 29-spline (notably stronger, and they take the Grand Cherokee disc-brake conversion almost bolt-on)—. And avoid the Ford Ranger 8.8 —usually 28-spline and drum-braked—: the good one is the Explorer's.

Up front, the XJ's Dana 30 is high-pinion (reverse-cut) from 1984 to 1999 —one of the strongest Dana 30s out there, because on a front axle the high-pinion works on the drive side. In 2000–2001 it switched to low-pinion standard-cut (like the TJ/ZJ's). Another important break: the u-joints grew around 1994/95, from the small 5-260X to the beefier 5-297X; if you have an early XJ and plan to push it, you can upgrade with 96-on shafts.

Specifications