I want to remove the rear springs on my f350 i have noticed thats there is a grease nipple.When i have removed that there is a grove.Then there is a nut.But i am not sure what to unscrew to get the shackle out can you help thanks

 

The small nut holds a tapered pin in, this small pin is what holds the large shackle pin in. remove the nut and drive that small tapered pin out. Now you can drive the large pin out, some people have removed the grease fitting and threaded a slide hammer in, to remove the pin. Or there is a hole through the frame that you can access to drive the pin out with a drift.
Good luck in your quest.

 

Thank you its so much better to have advice than just try and you make a mess of it.Thanks again.Do you no who sells the bushes shackels so i can fit new ones.I am not sure if the f350 have a different size bush than the other f models.

 

From my experience and according to my parts book the sizes can very. I suggest that you remove them and take close measurements of pin diameter, spring eye inside diameter and pin length. All six shackle pins should be the same size but if your springs have been repaired you may have different diameter eyes.