Sign Up Log In. Your Email Address. Note: This installation should be completed in conjunction with the manufacturer's service manual. Differential Instructions 1.
Drain oil, disconnect tail shaft, remove axles and the differential housing from the vehicles per manufacturers maintenance manual.
Remove both bearing caps from the differential housing marking left and right then remove differential from differential housing. Remove ring gear and bearings from differential. Note: Heat the ring gear in hot water or in an oven to C F to facilitate assembly, ensuring mating surfaces are clean before assembly. Torque ring gear bolts to vehicle manufacturer's specifications using Loctite on threads before tightening. Note: On some models the crown wheel bolts cannot be reused. Refer to vehicle manufacturer's manual for details.
Install bearings on new Air Locker. Note: When changing bearings be sure to use only genuine Timken bearings. It has been found that other brands have a different cage, which may foul on the seal housing.
Mark the differential housing for convenient hole location of brass bulkhead fitting. While this location is not critical, the hole should be in the upper part of the differential housing towards the right hand side of the vehicle. This will allow the plastic air line to the compressor to be run over the top of the axle housing, and provide clearance of the bulkhead fitting and tube on the inside of the differential housing from the differential.
When fitting an ARB Air Locker differential to the front of the vehicle, the bulkhead fitting should be in the upper part of the differential housing towards the left hand side of the vehicle. What Our Customers Are Saying. Great prices and wonderful customer service. Great service, great prices and always have what I need. You have hard to find parts and your how to videos are spot on. Your prices and quick delivery of the product was outstanding.
Once the bolts and bearing caps are removed you should be able to remove the differential from the housing. Technically, you are supposed to use a differential spreader to get this thing out but I just carefully used a pry bar and it popped right out.
If you choose to use this method be careful of the pinion gear and make sure you are prying on safe surfaces. Once the differential is out you will want to remove the ring gear off of it by using a 17mm socket to remove all of the gear bolts.
These suckers are on tight so I had to use a combination of an impact wrench and heat gun to get them out. Once you have the bearings pressed on you will need to reattach your OEM ring gear onto your Eaton differential reusing the bolts from your original differential.
You may need to use some heat on the gear to expand it enough so that it slides right on. Use red loctite on the threads of all the bolts and tighten them in a star shape pattern. The bolts need a 17mm socket and need to be torqued down to 71 ft lb. I also put matchmarks on the bolts so in the future I could tell if there was any loosening. You will now need to drop the new differential into the third member housing.
Before we can do that we will need to figure out how much side preload the new differential needs in the carrier. This takes a bit of guess work and testing so be patient. Reassemble the bearing races and pick a set of shims from your shim pack that allow the differential to sit in the carrier pretty snug. Once the differential is in you will need to measure the ring gear backlash using a dial indicator.
There are many videos out there that explain how to use a dial indicator but I found this one to be the most helpful to reference. You will need to get it to the stock range which is anywhere between 0. To adjust the backlash or distance between the ring and pinion gear you will need to change the thickness of the preload shims on each side of the differential.
Once you get a good readout you will need to reinstall the bearing caps, but before we can do this we will need to tweak the anti-rotation bracket on the locker. This bracket needs some play in it so the locker can engage and disengage.
So we will need to make some adjustments. Bend the bracket out a bit on each side so that it has some room to move with the bearing caps reinstalled. How much play is needed? Great question, here is a video that I recorded that illustrates how much play I ended up with on my install, and everything seems to be working fine.
Once you get the bracket all set up you will need to remove the differential and drill a hole in your third member housing so you can pull through the wiring that is required to activate your locker. I chose to go for a spot on the upper right quadrant of the housing since the wiring pig tail was pretty short.
After the hole is drilled out, reinstall the differential, pull the wiring through and use some high-temperature RTV on both sides of the housing to ensure that the wiring gasket is fully waterproof and sealed. Add your bearing caps back in making sure they are in the original orientation and torque down the four bolts to 76ft lb.
At this point you will want to take another set of ring gear run out readings with the dial indicator to ensure it has stayed within range after everything was tightened to spec. Repeat the previous steps to do this. However, better safe than sorry I say! Add some gear marking compound to your ring gear and rotate the gears a couple of revolutions both ways while putting some tension on the gears with a pry bar.
Here is a handy video on how to do this. Your contact pattern should look something like the image in the center both on the drive and coast side. Before reinstalling the third member to the axle, you will need to clean out the old gasket and install the new OEM seal that you bought.
A razor blade is going to be your friend here. Once the new seal is in, reinstall the third member onto the axle housing. Using a 14mm socket torque down the housing nuts to 38ft lb. These types of lockers are primarily used in racing situations.
However, they are not as strong as a traditional locker because they rely on the OEM carrier and reliability could become an issue if power adders, larger wheels and tires, and other modifications are made to the vehicle. Differentials and traction control.
Locking Differentials. A locking differential provides maximum traction to both wheels even when one is off the ground. What is a locking differential? Locking Differential noun : A differential that provides a locked axle condition.
How do locking differentials work? Locking differentials use various methods to lock the axles together and can be automatic or driver-selectable, depending on the model.
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