G80 Locking Differential Problems

If you have a GMC Sierra or Chevy Silverado with a locking rear differential, you may have experienced problems with the locking mechanism. The most common problem is that the locking differential will not engage when it is cold outside. This can be extremely frustrating, especially if you live in an area where it gets cold frequently.

There are a few things that you can do to try and fix this problem, but unfortunately, there is no guarantee that any of them will work. The first thing that you can try is to put the truck into four-wheel drive and then shift into low gear. This should engage the locking mechanism and allow it to work properly.

If this doesn’t work, you can try cycling the power to the rear axle by turning the key off and then back on again. Finally, if none of these methods work, you may need to take your truck to a dealer or mechanic and have them take a look at it.

If you’re having problems with your G80 locking differential, there are a few things you can do to try and fix the issue. First, check the fluid level and make sure it’s full. If it is, then you may need to have the system flushed and refilled.

Additionally, you can try adjusting the preload on the differential. This is done by loosening the bolts that hold it in place and then turning the center nut until the desired preload is achieved. Finally, if all else fails, you may need to replace the locking differential itself.

G80 Locking Differential Problems

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Are G80 Lockers Any Good?

G80 lockers are a great option for those looking for extra security for their belongings. These lockers are made of heavy-duty steel and come with a built-in locking system that is tamper-resistant. They are also weather-resistant, making them ideal for use in any climate.

Is G80 a Locker Or Limited Slip?

The G80 option is an Eaton limited slip differential. It uses cone clutches to provide a progressive locking action as torque increases. It is designed for use in heavy duty trucks and performance cars.

How Do I Test My G80 Locker?

If you have a G80 locker, congratulations! This means that your vehicle is equipped with a locking rear differential. This feature can be extremely useful when driving in treacherous conditions.

It allows both wheels to receive equal amounts of torque, which gives you more traction and stability on the road. Now that you know all that, let’s get down to testing your G80 locker. The first thing you’ll need to do is find a safe place to test it out.

A parking lot or an empty stretch of road will work perfectly. Once you’re in position, put your car into low range 4WD mode and engage the locker by pushing the button on the dash (if your car has this feature). Slowly accelerate while making sure both wheels are receiving power equally.

If everything is working properly, you should feel both wheels gripping the ground firmly as they rotate at the same speed. If you notice one wheel starting to spin faster than the other, or if there’s any strange noises coming from the rear end of your car, then disengage the locker immediately and take your vehicle to a mechanic for further inspection.

Does G80 Locker Need Limited Slip Additive?

G80 Locker is a locking differential that is designed for use with GM’s 8.5-inch and 8.6-inch axle assemblies. It uses a ratcheting mechanism to lock the axles together when needed, providing increased traction for off-road or towing applications. While the G80 Locker does not require the use of limited slip additive, it can be used if desired.

Limited slip additive can help to improve traction in slippery conditions by reducing wheel spin.

GMC G80 discount rear end problems

G80 Locking Differential Rebuild Kit

If you have a G80 locking differential in your vehicle, chances are you already know how great it is for off-roading. But what happens when it starts to wear out? You can rebuild it yourself with a G80 locking differential rebuild kit.

This kit includes everything you need to rebuild your G80 locking differential, including: new bearings, races, seals, and shims. It also comes with a step-by-step guide that walks you through the entire process, so even if you’ve never done this before, you’ll be able to do it with ease. The best part about rebuilding your own locking differential is that you can save a ton of money compared to taking it to a shop or buying a new one.

So if your G80 locking differential is starting to show its age, don’t replace it – rebuild it!

G80 Locker Upgrade

If you’re looking to upgrade your G80 locker, there are a few things you’ll need to do. First, you’ll need to remove the old locker. This is best done by removing the four bolts that hold it in place.

Next, you’ll need to install the new locker. Make sure that the new locker is properly positioned and aligned before bolting it into place. Finally, reconnect any wiring or tubing that was disconnected during the removal process.

Once everything is reconnected and in place, your G80 locker upgrade will be complete!

How to Identify G80 Differential

Differentials are an important component in any vehicle, as they are responsible for the distribution of power to the wheels. The G80 differential is a type of locking differential that is commonly used in off-road vehicles. This differential uses a set of clutch plates to lock the two halves of the differential together, providing increased traction and stability when driving on rough terrain.

If you have an off-road vehicle, it is likely that it is equipped with a G80 differential. To identify this type of differential, look for a large cover with bolts around the perimeter. This cover will typically have “G80” stamped on it.

Inside the cover, you will find a set of clutch plates that lock the two halves of the differential together. The G80 differential is a great choice for off-roaders who want increased traction and stability when driving on rough terrain. If you have an off-road vehicle, be sure to check if it has a G80 differential – it just might come in handy next time you’re tackling a tough trail!

G80 Locker Repair

If your G80 locker is giving you trouble, don’t despair! There are some simple things you can do to repair it yourself. First, check the latch to see if it is properly aligned.

If not, use a screwdriver to adjust it. Next, check to see if the locking mechanism is dirty or jammed. Clean it with a rag and WD-40 if necessary.

Finally, make sure that the strike plate on the door frame is lined up with the latch. If these simple steps don’t work, then you may need to replace the entire locker unit. However, this is usually a last resort option as it can be quite expensive.

We hope that this guide has helped you fix your G80 locker so that you can continue using it without any problems!


If you own a GMC truck with an 8-speed automatic transmission, you may have experienced problems with the locking differential. The good news is that GM is aware of the problem and has issued a service bulletin to dealerships. The bad news is that there is no fix currently available and it could take months for a solution to be found.

In the meantime, if you experience this problem, you should take your truck to a dealership so they can document the issue and try to find a temporary fix.


  • Mr Shamrock

    With more than two decades in the automotive world, Mr_Shamrock is Truckguider's go-to expert for Ford and Chevy Trucks. From the F-150 to the Silverado, his breadth of knowledge covers a wide range of models, making him a reliable resource for buyers, owners, and enthusiasts alike. His expertise is also featured in online communities like Truck Forums, where he offers valuable advice and reviews.

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