Locker Vs. Limited-Slip

Eaton produces an automatically-locking differential called a Detroit Locker that does an excellent job of enhancing traction, and it fully locks when power is applied-something that gives true all-wheel drive, but it isn't always welcomed by a driver in a turn or in icy road conditions. The full-locking capability is integral in extreme driving situations though, and automatically turns the Detroit Locker differential into a spool when engaged.

Eaton also produces a helical gear limited-slip differential called the Truetrac. A limited-slip differential is one that limits the slip between the axleshafts (or wheels) when power is applied to the differential. Though these limited-slip diffs generally have better street characteristics than locking differentials, they do not completely lock both axles together, which can leave one wheel spinning and one wheel caught up if the situation is bad enough. On top of that, many limited-slip differentials use clutch packs that can eventually wear out.

You'll have to figure out which differential is best for you, basing it on your uses and your vehicular application. Generally, we tend to let the vehicle's intended use be the dividing line between a locker and a limited-slip-if it's more of a daily driver it gets a limited-slip. If it's more of a toy, then it gets a locker.

Advantages of a Limited-Slip Differential
• Enhances traction in all weather and road conditions, including ice and snow
• Tires won't "chirp"
• No accelerated tire wear
• Silent operation (unless servicing is required)

Cons of a Limited-Slip Differential
• Doesn't fully lock both axles together
• Can possibly be weaker (physically) than a locking differential, depending on the design
• Certain limited-slips can sometimes pull side to side in a front axle application