G80 is the order code name of the new locking rear differential that Chevrolet trucks will be supplied with. This feature makes the most of traction for slick surfaces when the truck needs to get the job done. Despite of the weather or season, Chevy says that this automatic rear axle can help keep the truck moving ahead due to the improved confidence and control.

How does it work? The G80 automatically locks if one wheel starts to spin. This in turn makes the rear wheels e 2WD pickup can now be compared to a 4x4 one, and the 4x4 pickups can be considered eve stronger.

This also means that the G80 also delivers better traction in comparison to the limited-slip differentials.  In addition, because it is an automatic feature, it does not require driver's involvement.

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If there is an excessive wheel slip for example, the flyweight-type governor immediately steps in. This is a self-energized clutch system, which makes a cam plate to ramp against a side gear. This compresses the disc pack and rotates rear axle shafts and wheels at the same velocity.

The lockup is discontinued automatically and this can even remain unnoticed by the driver. This also hints towards a smoother ride, because the G80 works as an open-type differential.

Who can get the new automatic locking rear axle? It is suitable and currently available for nearly all Silverado models, Colorado WT and LT models as an option. On the contrary, Silverado 1500, all Silverado 2500 and all 3500 HDs will get it as a standard feature on their LTZ and Z71 versions. It comes also as a standard on Colorado Z71, Tahoe and Suburban.


DETROIT – Trucks need traction to get the job done. And whether it is winter snow, spring mud or the weed-covered boat ramps of summer, an automatic locking rear axle can help keep Chevy trucks moving ahead with enhanced confidence and control.

Often referred to as the G80 for its order code, the rear axle locks automatically if one wheel starts to spin, enabling both rear wheels to propel the truck. The added traction lets a 2WD pickup to go places traditionally thought of as 4x4 territory, and further enhances the capability of 4x4 pickups.

"The G80 locking axle provides a greater traction advantage than limited-slip differentials in most situations, while its automatic engagement requires no driver involvement, unlike some competitors' electronic lockers, which require driver activation," said Jeff Luke, executive chief engineer. "The G80's simplicity, durability and sure-footed grip have been proven with generations of customers, as it has been a staple of the Chevy truck lineup for more than 40 years."

The G80 automatic locking rear axle is available on most Silverado models, and is standard on LTZ and Z71 versions of the Silverado 1500 and all Silverado 2500 and 3500 HDs. Additionally, it is available on Colorado WT and LT models, and standard on Colorado Z71. It is also standard on Tahoe and Suburban.

With technology by Eaton, the G80 performs as an open differential until excessive slip in one wheel automatically triggers the locking mechanism, ensuring the rear wheels turn at the same speed. It provides more sure-footed traction than a conventional limited-slip axle, which can allow the wheels to turn at different rates in a low-traction environment, limiting the amount of traction-enhancing torque that can be channeled to the faster-spinning wheel. Unlike electronic lockers, the G80 engages and disengages automatically, with no input from the driver.

When the G80 detects excessive wheel slip, a flyweight-type governor engages. A self-energized clutch system causes a cam plate to ramp against a side gear, compressing disc pack to cause both rear axle shafts/wheels to rotate at the same speed.

The lockup and disengagement processes happen instantly and are practically imperceptible to the driver. Ride is smoother because the G80 operates mostly as an open-type differential in normal driving conditions.

"There are no buttons to push or electronic settings to engage," said Luke. "The G80 does its job instantly and quietly, so drivers can go about their job with confidence."

Video Source: YouTube

Source: Chevrolet