1. Tie down the steering wheel and should not move or spin.
(Important or else you could damage SIR)
2. Jack Driver side and remove tire.
3. Remove lower steering shaft bolt.
4. Remove the 2 Hoses from the box.
(Remove and save the hose fitting, you'll use that for the new box.)
5. Remove relay rod nut.
6. Use pickle fork to separate Pitman arm from relay rod.
7. Remove 3 bolts that holds the box.
(Careful it's heavy, tie it down or have someone hold it.)
8. Remove the Pitman from box with the puller.
Reverse everything for install.
After putting everything back fill the reservoir, and bleed the system.
(Important keep the fluid level full at all times while bleeding.)
You'll probably gonna need alignment.