Driveline and Axles

Comparing open diff vs limited slip vs locker differentials. Learn how each works, pros and cons, and which is best for your build.

Decode, ID, and upgrade your GM 12-bolt rear end. Learn axle specs, gear ratios, and best performance parts upgrades.

The pros and cons of a welded diff vs open diff, plus what to know before learning how to weld your differential.

Concerned about a transmission swap? Our engine transmission compatibility checker will help confirm what you need to make it happen.

Quick change rears have been around since the 1940s and while many are familiar with them, to others they’re a mystery we’ll help explain

GM’s 10-bolt rear axle has been around since the 1960s, here’s how to determine if your junkyard find is worth taking home

We help determine what are the best 10-spline quick change gear ratios for your street or racing needs

Using the proper U-joint size is critical to correct fitment and operation of your driveline's driveshaft.

Upgrading to (or updating a poorly designed) independent front suspension, or IFS, will vastly improve your classic muscle car, hot rod, or pickup truck’s braking and handling

The LS swap is no doubt still going strong, but if you’re planning to run an automatic behind your 4.8, 5.3, or 6.0L LS-powered ride, you’ll need to pay attention to a few items we discuss in this buyer’s guide.