It's probably a good idea to remove the motor assembly before shipping the 3rd to your favorite gear installer. It's so easy to do and involves removing only one 12mm bolt.

Step one is to note the position of the locking fork. Normally, the fork is in the locked position (all the way in). In order to get the 3rd out of the housing the fork should be all the way in to allow clearance when pulling the 3rd out. Even if the fork is un-locked and all the way out, it's just a matter of noting and maybe measuring it's position.

This one is in the locked position so the collar splines are almost even with the lip as shown with the pointer.

Another way to reference the fork position is to use a metal ruler like this one....it's 1 inch wide and has numerous ways to reference the fork's position.

Here's a straightforward measurement to keep it simple.....5/8" across the airgap.

There are 3 bolts that hold down the motor. Two of the bolts are super long and are also used to secure the 3rd in the axle housing so those holes are already vacant as shown.

Use a 12mm wrench to remove the only remaining bolt.

It's aluminum so very lightly tap out the assembly. It may be a little rusted in place so use caution where it's clubbered with the hammer.

Set the motor assembly in a safe place.

Due to the plastic nature of this sensor, it might be a good idea to unscrew it also....there might be a steel ball behind it so take note. Done :)