Yukon blog
Lock & Load With Yukon Traction Devices – Dura Grip LSD, Zip Locker, Grizzly Locker
Yukon has tried-and-proven traction devices designed to handle all types of tough terrain. Choose from the Yukon Dura Grip limited slip differential, Yukon Zip Locker, or the Yukon Grizzly Locker. In order to make a more informed choice, here are some factors to consider when looking at traction adders. Differences Between LSDs & Lockers In their static state, limited slip differentials are pre-loaded and provide traction to both wheels. When the LSD is further loaded under acceleration, in a fast corner, or when wheel slippage occurs off-road, the clutch packs limit wheelspin across the drive axle by permitting the axle shafts to spin at different speeds while continuously trying to balance the application of torque between the two axles. This results in transferring more power to the wheel with the best traction. Lockers produce 100% lock-up where all the power is directed to both tires when the unit is engaged. Lockers are tougher than limited slips. Limited slip differentials do not generate 100% lock-up and do not require activation from the driver. Their engagement is mechanical, reacting to driving conditions such as load and wheel slippage. Yukon Dura Grip LSD The Yukon Dura Grip is a great choice for transforming an open differential into a highly capable unit that can provide two-wheel grip when needed. Engineered for long life and completely rebuildable, Dura Grips feature a high-strength nodular case, forged 4320 chromoly spider gears, and composite clutches. In clutch-type LSDs like the Dura Grip, the spring array applies pressure to the side gears, which puts pressure on the clutch packs in the outer part of the carrier. Both axles receive equal pressure and traction. When a tire starts slipping, the clutch packs engage with different resistance to maintain synchronization between the tires, transferring more torque to the tire with the best grip. Rebuilding a Dura Grip involves replacing the clutches in the unit. Clutches can be replaced to restore original performance, or non-stock clutches and springs can be used to fine-tune performance for specific driving or racing styles. Shop Yukon Dura Grip LSD Differences Between Yukon Zip & Grizzly Lockers The primary difference between these two lockers is actuation. The Yukon Zip Locker is air actuated, while the Grizzly is a mechanical locker. An advantage of an air-actuated locker like the Zip Locker is the ability to choose when to engage the unit, along with superior on-road performance. A drawback is the need to purchase and plumb an air system to operate the locker. Mechanical lockers like the Grizzly are always active, providing 100% lock-up at all times, including on the road. On-throttle conditions induce locking, while off-throttle situations partially unlock the unit. During turns, the unit may produce a loud clicking sound as the gears ratchet, which may be undesirable for vehicles that spend significant time on the street. The bottom line is that Yukon is a one-stop traction destination, offering products for all levels of performance, from daily drivers and weekend warriors to dedicated rock crawlers and drag racers that demand maximum traction. Shop Yukon Zip Lockers Shop Yukon Grizzly Lockers
How It Works: Dropout vs. Carrier-Type Differentials
While every differential housing performs the same basic job—holding the gears that turn engine power into forward motion—there are two key designs you’ll find out there: dropout differentials and carrier differentials. Dropout Differentials Dropout differentials—also called third members—can be identified by their removable front center section. The ring-and-pinion gear set lives inside a carrier assembly that can be easily removed or “dropped out” for service or gear swaps. The legendary Ford 9-inch is the most famous example of a dropout differential, but GM, Toyota, Chrysler, and others have used them as well. The ribbed housing is a quick giveaway that this is a Ford 9-inch. Common Dropout Designs The Ford 9-inch has countless aftermarket configurations, but it’s not alone. Toyota’s lineup includes the 7.5”, 8”, 8” high-pinion, 8” clamshell, 8.5”, T100 IFS, and several 9”, 9.5”, and 10” variations. Mopar fans know dropout-style diffs as banjo-style differentials, with the Chrysler 8.75” being the standout example. Dana has also built many dropout-style units that show up across different makes and models. Fun fact: in some circles, a front-loading dropout differential is called a pig-style diff, and across the pond, the ring gear is known as a crown wheel. No matter what you call it, they all get the job done. Why Choose a Dropout Differential? The main advantage of a dropout differential is ease of gear swaps. Because the entire gear case can be unbolted and removed, all the setup work—ring and pinion installation, backlash adjustment, and pattern checking—can be done comfortably on a workbench instead of under the vehicle. That means faster swaps, easier adjustments, and a cleaner install overall. Carrier Differentials Carrier differentials, on the other hand, are identified by their rear cover. To access the ring and pinion gears or other internals, you remove the cover on the back of the housing. GM’s well-known 10-bolt and 12-bolt designs fall into this category. In British terminology, these are called Salisbury differentials. If you can see the gears from the back, you’re looking at a carrier-style differential. Strengths of Carrier Differentials Carrier-style diffs are extremely common and have a few key strengths. Inspection and troubleshooting are easier—just pop the rear cover and you can see inside. No need to remove the entire center section to diagnose a problem. (Some aftermarket dropout diffs now include rear inspection covers to address this advantage.) One drawback for off-roaders, however, is the exposed diff cover. On rocky trails, a stock stamped-steel cover can get peeled back or punctured by a rock or tree stump—leaving your gears vulnerable. Protect Your Investment with Yukon Hardcore Diff Covers That’s where Yukon Hardcore Performance Diff Covers come in. Built from thick-walled nodular iron, these covers protect lockers, gears, and axles from impacts and housing flex. Each Yukon Hardcore cover features a durable powder coat finish, a magnetic drain plug, a premium gasket, and high-strength fasteners for a clean, reliable install that’s ready for anything the trail can throw at you. Shop Yukon Diff Covers Know Your Setup Understanding the difference between dropout and carrier differentials will help you make smarter choices when upgrading or servicing your drivetrain. Whether you’re re-gearing, installing a locker, or just protecting your investment, knowing how your diff works—and what upgrades it deserves—makes all the difference. Shop Yukon Re-Gear Kits