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Radius Arm Bushings/Isolators

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22K views 16 replies 6 participants last post by  Jdaniel  
#1 ·
Does anyone know on a 4x4 if there is a difference in the radius arm bushings from the front 2 to the back 1? I am in the process of gathering the parts to rebuild the front end and these have stumped I've found kits to replace the 4 up front but nothing for the single bolt connection back to the frame bracket. If they are different are they called something else? I've looked up radius arm bushing, radius arm isolators and can't figure out what is the correct part number.
 
#12 ·
4 are in the axle and 2 are in the radius arms
here is someone posting part #'s for the axle side ( look in comment for that #)
these are not high wear items
Am I the only one cringing at the guy working on a Super Duty axle in crocks....then sock feet???!!!

(just waiting for OSHA to come storming in handing out a red-neck ticket LOL)
 
#3 ·
This is what I needed, thanks! I need to check them out on my truck I don't have any death wobble but things are starting to get sloppy and I've developed a clunk in the floor board right where the radius arms bolt to the frame so figure with 260K miles might as well replace it all but if these check out when I jack it up tonight. I will definitely avoid replacing them if all looks good as they don't look to be to fun to do while the axle is still part of the truck.
 
#6 · (Edited)
i just had this done to my 2011 F350.I ended up having to buy new radius arms because there was a “national back order” on the bushings that go into the arm. Come to find out, Ford actually revised the bushings in the arms making them smaller and just stopped buying the larger bushings for the arms.

The new bushings and radius arms made the truck drive and ride so much better though. My truck has 150,000 miles so I know your bushings are shot. They’re actually suggested to be replaced every 100,000 miles according to everything I’ve read and heard. But they wear out so gradually that most people don’t realize how rough riding their truck has become until they feel the knocking you’re feeling.

Just get them replaced. You won’t regret doing it.