Here is our 1967 Chevy C10 affectionately dubbed "Truck Norris" by former HOT ROD Editor David Kennedy. We've replaced the open-differential carrier in the truck 12-bolt with an Eaton Detroit Truetrac ...

Pitching the stock differential out from under a GM car in favor of a 9-inch Ford has always been the best way to step up the drivetrain for drag racing. Since the price of used 12-bolts has ...

As certified gearheads it’s hard for us to leave a vehicle just the way the factory intended. Modifying our 4x4s is what we enjoy, and since you’re reading this magazine we’ll assume that you’re OK ...

If you have to drive your 4x4 daily, a limited-slip differential may be just the ticket for enhancing your vehicle's off-highway capability while retaining its pleasing day-to-day driveability. A ...