Figured I'd add this for the writeups. Did it about 2 months ago. Overall I am very happy with it. My other one was shot so it was a impressive difference. Huge difference in size. My only problems with the install was that Advanced auto kept giving me bad boxes. The first one was a durango box, the box had play which I could not take out adjusting the preload. The second box was a waggy box, the threads for the pitman arm were stripped. The third box was another durango one and its fine. Took 3 or 4 days but it got done. It bolts up without a hitch. Same bolt pattern just a wider box. 3 full turns lock to lock. To do this you will need...
A steering gear box from a 99 Durango 5.2L
Pitman arm puller
5/8 socket
1 and 5/16" socket
13mm socket
17mm wrench
ft/lbs torque wrench
power steering fluid
Pickle fork
Drain pan
Jack and stands
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Torque settings
Steering gear to frame: 65 ft/lbs
Pitman arms to shaft: 185 ft/lbs
Stabilizer bar to frame: 55 ft/lbs
Stabilizer bar to link: 27 ft/lbs
Center link to pitman arms: 55 ft lbs
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Start by Jacking up the front axle and getting the wheels off of the ground. Then secure jackstands under the vehicle.
Then remove the cotter pin on the castle nut holding the draglink to the pitman arm, followed by removing the castle nut.
Then drop the draglink from the pitman arm by using a pickle fork.
If you have sway bar disconnects, disco them and pull them down to swing the antisway bar out of the way of the pitman arm nut. If not then you must drop the swaybar by removing the mounting bolts.
Remove the nut and washer from the pitman arm.
Remove the pitman arm using a puller
Position a drain pan under the steering box then remove the power steering lines going into the steering box, then allow it to drain or if you want to save the fluid clamp the hoses off.
Remove the sheild going over the steering shaft behind the steering box by removing the 13mm bolt holding it on. Then rotate the steering shaft until you can see the other 13mm bolt at the joint on the input shaft on the box. Remove the 13mm bolt and slide the steering shaft back and out of the way of the box.
Remove the 3 mounting bolts for the steering box from the uniframe rail. Make sure you have a hold on the box as you remove the last bolt. Lower the box and pull it out.
Now you have the two next to eachother.
Reinstall everything in reverse. When reattaching the steering shafts collar to the input shaft of the box it was a tight fit for me. I jammed a flathead in the crack in the collar to open the gap up a bit so I could slide it on. Not sure why it didnt line up for me. Maybe a different spline count? Maybe advanced auto buys sucky remans. Make sure you bottom out the steering shaft and drop in the 13mm bolt.
Once everything is installed and torqued down you then add fluid to the steering box. Turn the wheels from lock to lock with the front end still off the ground. Do this for a few times and check the fluid level. I had to do this for about 10mins to get out all of the air. Dont overfill the reservoir. If you do, pull out the excess with a turkey baster. After you burp the system for a bit and dont see the fluid burping up in the reservoir then start the vehicle. Turn lock to lock for a bit more just to make sure no air is left in the lines. Drop the vehicle off the jackstands and check the fluid level once more. Take her for a drive and see how it goes.