Axial Yeti XL Build – Part 3 – Rear Differential

Tony Phalen March 4, 2015 RC Build Blog - Axial Yeti XL Build 751 Views

The Build – Part 3
Time to build the rear differential. Other than the outdrives, the rear diff build is exactly like the front. You should breeze through this step.

Build Notes:

We’ll be filling the rear diff with fluid. It’s a good idea to have a clean working surface that is covered with a towel (or something similar) and some clean-up rags.

Step 1:
Axial Yeti XL Build – Step 27

Press one of the 8×16 bearings onto the diff gear. Slide the drive cup into place as shown. Hopefully you’re seeing the short cups like the ones in the picture.

Step 2:
Axial Yeti XL Build – Step 28

Flip the assembly over and slide the red o-ring onto the outdrive. Place the 6×19 shim into place and press down to seat the o-ring.

Step 3:
Axial Yeti XL Build – Step 29

Slide the short pin through the hole in the outdrive. Flip the sun gear over and press it into place, keying it to the pin.

Step 4:
Axial Yeti XL Build – Step 38

Set the diff gasket onto the gear as shown. Make sure you line up the holes.

Step 5:
Axial Yeti XL Build – Step 30

Press the other 8×16 bearing onto the diff housing followed by the short drive cup.

Step 6:
Axial Yeti XL Build – Step 31

Flip the assembly over and slide another red o-ring onto the shaft. Slip the 6×19 shim onto the shaft and press it down to seat the o-ring.

Step 7:
Axial Yeti XL Build – Step 32

Like the front, you’ll want to rotate the housing to line the holes up. Slide the pin through the housing and into the drive cup.

Step 8:
Axial Yeti XL Build – Step 33

Once installed, seal up the hole with the M4 set screw. Screw it in until it’s flush with the outside of the housing.

Step 9:
Axial Yeti XL Build – Step 34

Center the pin and drop the sun gear into place.

Step 10:
Axial Yeti XL Build – Step 35

Make two sun gear assemblies.

Step 11:
Axial Yeti XL Build – Step 36

Key one sun gear assembly to the notches in the housing and drop into place. Key the other and drop it into place. Like the front, you’ll want to make sure the flat spots mate when the sun gear assemblies are installed. Rotate the drive cup to make sure all the gears have seated correctly.

Step 12:
Axial Yeti XL Build – Step 37

Fill the housing up with the 20000CST fluid up just past the top of the gears. Let it set for a few seconds to make sure the fluid has seeped into all the nooks and crannies. Refill if necessary.

Step 13:
Axial Yeti XL Build – Step 39

While lining up the holes, set the gear-side assembly on top of the housing side and screw together. Rotate the drive cup a few times during assembly to make sure the gears are meshing correctly.

Step 14:
Axial Yeti XL Build – Step 40