Now for the finale. Place the TrueTrac back into the axle housing, complete with the new bearing cups over the bearings (again, make sure the left bearing cup is on the left, the right on the right, so that your backlash measurements will remain true).
This time, as I expected, it was a very tight fit, due to the fact that the TrueTrac now has the extra shims added on each side to establish a stout preload. I found that it was too difficult to hold the TrueTrac in place while banging it in with a rubber mallet, and I was concerned that I was going to put it in on an angle and damage the bearing cups. Instead, I removed one of the thick spacers (those 3/8 inch things I mentioned before, which look like super-thick shims, free-floating outside the bearing cups). Then I placed the TrueTrac easily into the housing, and tapped the spacer back into position.
I re-measured the backlash, just in case. Still perfect at 0.005 inches. Whew, what a relief. Install the bearing caps and torque to spec (57 lbs).
The remaining steps are easy and fun.
Rotate the TrueTrac inside the axle housing so that the slot is facing you. Insert an axle shaft and push it all the way in, so that the groove at the end for the c-clip is exposed through the slot in the TrueTrac.
Install a new c-clip (which comes with the Crown axle). In the picture above, I've already installed the c-clip. Then pull the axle shaft out about an inch, to seat the c-clip in its new home inside the TrueTrac. (Obviously, the steps are exactly the same if you are reinstalling the old axle shafts.) Repeat for the other axle shaft.
Then open the package that comes with the TrueTrac, containing the axle shaft spacer, retaining cylinder (in other words, the cover), and snap ring. Here's what they look like:
And here are the directions about how they are installed:
Nothing to it. Place the spacer in between the ends of the axle shafts. This isn't a tight fit, but don't worry, this spacer doesn't have a difficult job. The only time it matters is when the wheels are off. When the wheels are on, it's not possible (or at least, I don't think it is) to push the axle shafts in far enough for the c-clips to become unseated. Then put the retaining cylinder in place, and snap in the snap ring. I used a pair of $7 Craftsman snap ring pliers to do this. Note the directions above, which say to make certain that the snap ring is correctly seated.
And there it is: the TrueTrac is installed.