These Danas are indistinguishable in appearance. The military Model 25 has a thick, cast cover, while the 27 and civilian-model 25s have a thinner cover, will accept taller gears, and backed V-6s.
<hr> DANA 28
The alloy-case Dana 28, with a 6 5/8-inch-diameter ring gear, came in Bronco IIs and Rangers with anything but the 4.0-liter engine. Although 4.0-liter trucks come with Dana 35s, most of the front suspension and/or drivetrain needs to be swapped to replace a 28.
<hr> DANA 30
The Model 30, with a 7 1/8-inch-diameter ring gear, was the standard front differential in some 1972-75 CJ-5s and all 1975-and-later CJ-5s and CJ-7s. It is still used in the front of Cherokees and Comanches, and will probably appear in the front of the Grand Cherokee.