We consider a rear end locker to be a worthy investment in the long run. We are here to help you pick the best one for your needs from all the best available products in market today.

Our review process: Show/Hide

Our Top Picks:

Best Overall: Buy: Yukon Gear Rear End Locker READ REVIEW

Best For Reliable Traction: Buy: Usa Standard Gear Rear End Locker READ REVIEW

Best For Easy Installation: Buy: Qp Posi Unit READ REVIEW

Best For High Strength Steel: Buy: Yukon Gear & Axle Rear End Locker READ REVIEW

Best For Rear Differential: Buy: Qp Rear End Locker READ REVIEW

Best For Very Reasonable Price: Buy: Yukon Install Kit READ REVIEW

Best With Locking Differential: Buy: Yukon Rear End Locker READ REVIEW

Best For Bottom Line: Buy: Powertrax Rear End Locker READ REVIEW

Best For Rugged Competition: Buy: Powertrax Every Kit READ REVIEW

Best Overall: Yukon Gear Rear End Locker

Buy on Amazon

Yukon Gear makes beautiful and great lockers with classic and higher-grade materials. The Yukon Gear Rear End Locker is designed for a good fit, can sustain for a long life and it is good for low quality. All units are backed by extensive product testing and state-of-the-art software design. Also, it is rock solid, is designed for ultimate durability and it is very nice.

Above all, the yukon gear rear end locker provides aggressive traction to both wheels while maintaining a smooth ride.

Almost all buyers agree that the locker does fit, but you need to buy the ring and pinion part number yg gm8.5-373. In addition, they say that the locker comes with new shims and also fits 8.5 and 8.6 rear ends. Moreover, they say that the locker will fit the rear 8.6" 10 bolt rear axle in the 07 avalanche. Without any doubt, this product passed the test and had very satisfied buyers eager to share their experience.

• This will not work unless you upgradeing to a larger 30 spline axle.
• This comes with posi traction rears from the factory.
• This has a 9.75" 12 bolt rear differential.
• This will work beautifully in your chevy if you have a 10 bolt cover.

Best For Reliable Traction: Usa Standard Gear Rear End Locker

Buy on Amazon

For a low asking price, the standard gear rear end locker has managed to overwhelm their customers by packing as many features as they could. The USA standard gear rear end locker improves ease of installation. The spartan locker is manufactured using standard gear, an aftermarket manufacturer delivering the most reliable differential parts for the lifestyle you lead. The spartan locker 's design does not use the thrust washers and has a revolutionary spring and pin design that makes installation a snap.

The locker is made from 9310 steel. Lastly, the USA standard gear rear end locker is designed for an extended life.

Most buyers quickly discover that the locker is an easy install if you are mechanically inclined. In addition, they also found that the locker is for a dana 30 with 27 spline axel shafts. In addition, they strongly agree that the locker has many models to add to those made in the United States. With no doubts, this product passed the test and had very satisfied buyers eager to share their experience.

• This can use a notched 7/8" diameter cross pin.
• 5 year warranty against manufacturer defects.
• This is an excellent choice when looking for an affordable solution in off-road traction.
• This can be used in front and rear.

Best For Easy Installation: Qp Posi Unit

Buy on Amazon

The best part: Qp Posi Unit costs comparatively low and it is available to ship in 24 hours. The qp posi unit includes (2) carrier bearings & (2) carrier bearing races. Make sure this fits by entering your model number. Moreover, it fits perfectly and it is worth the money.

Finally, the qp posi unit fits 2.73 & numerically higher gear ratios.

Almost all customers opine that the locker has an 8.5 10 bolt. Also, a few strongly agree that the lockers will go away eventually. Further, they say that the locker is a perfect replacement for the g80 gov locker, so yes, it will work.

• This is for heavy duty composite clutches and it is made for perfect fitment.
• This fits 1999 and newer Chevy 1500 applications.
• This is for a gm 30 spline axle.
• This is for an 8.6 2005 chevy 1500 truck.

Best For High Strength Steel: Yukon Gear & Axle Rear End Locker

Buy on Amazon

The Yukon Gear & Axle Rear End Locker should be able to handle its purpose and duties with ease. The yukon gear & axle rear end locker has click in turns and it is simple. The manufacturer says: Our products are made of high strength components and subject to rigorous testing and quality control by our engineering team in the USA. The yukon grizzly locker is the ultimate in mechanical locking differentials for street, off - road, and drag racing.

The locker is crafted from exceptionally strong metals. Above all, the yukon gear & axle rear endlocker is made with fast shipping, is ideal for high performance and it works with high - strength steel.

Almost all customers opine that the locker will not change the backlash between the ring and pinion. And, they strongly agree that the locker works in an open differential 4 pin carrier. Further, a few say that this locker is made with a full floating axle with a 10.5 inch ring. A non floating axle is a 9.5 inch ring. This will not suit. In short, at the price, they believe that they got a steal of a deal with it.

• This is great in a long bed extended cab.
• Patented internal design reduces common locker failures.
• This fits the 10.5 with an open carrier only.
• This will work in any open differentials.

Best For Rear Differential: Qp Rear End Locker

Buy on Amazon

The Qp Rear End Locker's material feels more premium than its price would suggest. The qp rearend locker fits 2.73 & numerically higher gear ratios. Make sure this fits by entering your model number. Further, the locker is great with fast shipping, fits perfectly and it works as intended.

Lastly, the qp rear end locker includes (2) carrier bearings & (2) carrier bearing races.

Almost all customers quickly discovered that the locker came with shims, so buy a differential install kit. Furthermore, a few also found that the locker fit any 8.5 10 bolt rearend. In conclusion, at the price, they believe that they got a steal of a deal with it.

• This is worth the money and it is designed for a great price.
• Heavy duty composite clutches, 400lb springs & forged 4130 internals.
• New gm 8.5" posi unit - 28 spline w/ carrier bearings/races.
• This is perfect with no issues.

Best For Very Reasonable Price: Yukon Install Kit

Buy on Amazon

The Yukon line of lockers comes in a pretty wide variety of styles, so you can definitely find one that suits your individual preferences and needs. The Yukon Install Kit is fit and perfect and it can qualify for free shipping. Make sure this fits by entering your model number. And, it is designed for a great price and it is built with great parts. Finally, the yukon install kit offers more at a reasonable price, works perfectly and it is made for a very reasonable price.

Most customers opine that the locker comes with a 1-year factory warranty as well. Moreover, they strongly agree that the locker includes all bearings, and seals to install the posi unit. Moreover, a few say that the locker will be a good choice with clutch type posi. In short, at the price, they believe that they got a steal of a deal with it.

• This package has a 30 spline posi unit and includes the 3.73 gear ratio.
• This comes with new axle bearings, wheel seals, and wheel studs.
• These units are very similar, if not identical to an eaton posi unit.
• Brand new chevy 8.5" yukon dura-grip (clutch) posi unit (30 spline).

Best With Locking Differential: Yukon Rear End Locker

Buy on Amazon

The Yukon Rear End Locker should be able to handle its purpose and duties with ease. The yukon rear end locker works well for high performance and it is great for customer service. The manufacturer says: Our products are made of high strength components and subject to rigorous testing and quality control by our engineering team in the USA. These units are able to provide 100% power to both tires, while allowing for disengagement to navigate corners in the road and bends on the trail.

The locker is used high strength steel and it is perfect for great quality. Most importantly, the yukon rearend locker features 8620 internals for maximum strength.

Most customers quickly discovered that the locker would require a high bearing set. Further, they strongly agree that the locker works with a 3.57 & up ratio. Moreover, a few also found that this locker is more for a purpose built off - road setup.

• This is made from various parts, since most of those fit in the axle.
• This has an 8.5/8.6 rear end, it will fit.
• This unit will work great as long as your rearend has a 10.
• This has a 10 bolt rear cover, not the 14 bolt cover, yes.

Best For Bottom Line: Powertrax Rear End Locker

Buy on Amazon

The Powertrax Rear End Locker's high-end materials make sure that it ages well with use. The powertrax rear endlocker is the leading manufacturer of traction adding differentials for the light truck, sport utility and performance street rod market. Only ultra strength material is used, which is 67% stronger than titanium. The powertrax no - slip traction system is the latest design in quiet traction - adding differential technology.

The locker is as close as it gets to a traditional and trusted muscle car or truck style limited-slip. Most importantly, the powertrax rear end locker is widely used in demanding off-road applications around the world requiring extreme traction output and high-strength.

Almost all buyers opine that the locker will fit the 9.25 rear axle with an open carrier. In addition, a few say that the locker is machined to work with the stock c-clips on your chrysler 9.25. Moreover, a few say that the locker itself works well, especially for the price and ease of installation. Overall, many customers have used the powertrax rear end locker for more than a few months without any complaints, and it shows no sign of giving up.

• This is committed to quality, continual improvement and customer satisfaction.
• This is great for use where finesse is as important as brutal traction is.
• Special gear and spring design reduce the backlash and therefore driveline windup.
• This will not work on your front 9.25 axle.

Best For Rugged Competition: Powertrax Every Kit

Buy on Amazon

We would, of course, be remiss if we didn't mention powertrax in every kit for daily use. The Powertrax Every Kit is also important for outdoor enjoyment and recreation. Whether you want your muscle car to lay two stripes when coming off the line, are trying to get your family to their favorite skiing spot, or are getting ready for a weekend of recreational off-roading, hunting, or fishing, you need traction. The lock - right eliminates wheel spin - up and therefore its associated driveline trauma is negated, the strength and integrity of its surrounding original case and other driveline components are, in effect, substantially increased.

The locker is committed to quality, continual improvement and customer satisfaction. Also, the locker is designed for rugged competition and off-road traction needs, This is not for the timid. Most importantly, the powertrax kit is widely used in demanding off-road applications around the world requiring extreme traction output and high-strength.

One customer says - "This is a 'lunchbox' locker. take your time and follow your guide. ". Most customers found that the locker is easy to install, works great so far.

• Only ultra strength material is used, which is 67% stronger than titanium.
• This is good for the bottom line and it is simple.
• This is great for use where finesse is as important as brutal traction is.
• A precise synchronization mechanism eliminates the ratcheting sounds typical of other locking differentials.