The front axle in the ’99 to ’08 Dodge 2500/3500 and ’99 to ’04 Ford Super Duty trucks are great examples. Overall, these are pretty good assemblies, but they use unit bearings, which ...

This axle has such a legacy, many people simply refer to it as a “60.” Dana Spicer has built this axle in dozens of forms, and it debuted in the front of four-wheel-drive 1-tons in the ’70s.

They included a pair of heavy-duty live axles, one called the Ultimate Dana 80 and the other the Ultimate Dana 60. Both are designed for Jeep builders looking to run 40-inch or larger tires or ...