How do you change the right rear shackle on a 95 f150 4x4 it is the front one

no
not on both ends
the reason is obvious
the shackle allows the length of the spring to alter from bumps and loads
there is a fixed eye at one end and that positions the axle to maintain alignment
now if you had a shackle at both ends then the axle would be allowed to move out of alignment and cause handling problems
On tandem axles , the shackles are on the center pivoting bridge section but the other ends are still fixed eyes

The bushings inside the shackle (where the bolts go through) are worn out.

Check the brake rotors up front for bluing or spalling, you may have had pads replaced, but if a caliper gets stuck so it cannot move in relation to the abutement it is bolted to, or a piston is not fully retracting, this can cause that as well,

Also take a look at the rear springs- the shackles, where the shackles mount to the frame and the spring leaves- you may have broken main leaf which if broke a certain way, could allow the rear axle to shift it's orientation to the rest of the vehicle. Also look to see if the frame is twisted- it is a boxed frame, but it is soft.

If you have power steering, put the front wheels up in the air and block the rear wheels so it does not fall off, then start the vehicle and see if the steering will allow you to steer from stop to stop with one finger. If it has a power steering valving issue, it will show up by spinning the wheel out of your control until it hits the stop.

If the alignment is truly that bad, or the vehicle has been in an accident, you will see odd wear patterns across the tires. Getting what is called a "thrust alignment" or "4 Wheel" alignment will make the vehicle drivable.

What the back is to low or left and right side not even if you whant to lift the rear suspension air shocks

well i told my mechanics to thrill me and swap the rear tires - wow amazing it changed now it doesn't drift left just slightly to the rt. i know the blonde doesn't know anything lol - thanks Christine

Shackles are pretty straight forward. Remove the existing bolts, change the shackles and reverse the procedure to install. Good idea to change the bushings while you're in there if they are at all questionable. It's best to do this with the CJ in the air, supported on the frame and use a floor jack under the axle to lift/lower the spring in/out of the shackle, one side at a time.

Biggest tip is make sure you have a good floor jack to support the end of the spring so you can pull the bolts out easily and then reposition springs to lign up then new shackles and re bolt everything.

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/sean_54c3a3dc48a7773c

Welcfome to fixya.Here is the priocedure if you need anything just go to www.collisionrepairadvice.com

1. Raise and support vehicle. Support at frame behind front springs.
2. Remove front wheels.
3. Scribe alignment marks on propeller shaft and axle yoke for proper assembly, then disconnect propeller shaft at axle yoke.
4. Disconnect connecting rod at steering knuckles.
5. Disconnect shock absorbers at axle housing.
6. Remove stabilizer bar connecting links to spring tie plates attaching bolts, if equipped.
7. Disconnect breather tube at axle housing.
8. Disconnect stabilizer bar link bolts at spring clips.
9. Remove disc brake calipers, rotors and brake shields.
10. Remove U-bolts and tie plates.
11. Support axle assembly with suitable jack to relieve spring tension.
12. Loosen rear spring shackle to spring attaching bolts.
13. Remove front spring shackle to spring attaching bolts and lower spring to floor.
14. Remove axle from under vehicle.
15. Reverse procedure to install.

Rear Axle Notes

1. Raise and support vehicle.
2. Remove rear wheels.
3. Scribe alignment marks on propeller shaft and axle for proper assembly, then disconnect propeller shaft from axle.
4. Disconnect the track bar from axle mounting bracket.
5. Disconnect parking brake cable at equalizer.
6. Disconnect shock absorbers at axle tubes.
7. Disconnect hydraulic brake hose at rear axle Tee-fitting, then tape ends of hose and fitting to prevent contamination.
8. Disconnect axle vent tube from axle.
9. Remove U-bolts and tie plates.
10. Loosen spring mounting bolts.
11. If equipped, disconnect ABS wiring connections at axle.
12. Support axle with suitable jack.
13. Remove spring-to-shackle attaching bolts and lower spring to the floor.
14. Remove axle assembly.
15. Reverse procedure to install.

Front Axle Notes

1. Raise and support vehicle at frame behind front springs.
2. Remove front wheels.
3. Scribe alignment marks on propeller shaft and axle yoke for proper assembly, then disconnect propeller shaft at axle yoke.
4. Disconnect connecting rod at steering knuckles.
5. Disconnect shock absorbers at axle housing.
6. Remove stabilizer bar connecting links to spring tie plates attaching bolts, if equipped.
7. Disconnect breather tube at axle housing.
8. Disconnect stabilizer bar link bolts at spring clips.
9. Remove disc brake calipers, rotors and brake shields.
10. Remove U-bolts and tie plates.
11. Support axle assembly with suitable jack to relieve spring tension.
12. Loosen rear spring shackle to spring attaching bolts.
13. Remove front spring shackle to spring attaching bolts and lower spring to floor.
14. Remove axle from under vehicle.
15. Reverse procedure to install.

make sure shackle is shorter than one removed.