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 ...

Because of the gradual downsizing of all U.S-produced automobiles and the massive invasion of our market by foreign automakers, the "brute horsepower, neck-snapping acceleration and no gas-mileage" ...

Which rearend is better? GM’s time-proven 12-bolt or Ford’s popular 9-inch. Each has its advantages and disadvantages. The Ford 9-inch is heavier and eats up more power due to a disadvantage in pinion ...

Knowledge is priceless. That's true generally, and it's especially true when you want to upgrade your 4x4's axles. Because of the investment and the work involved in this type of upgrade, it's ...