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1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

radius arm bushings?

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Old Jul 7, 2004 | 09:39 PM
  #1  
wrenchturner's Avatar
wrenchturner
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From: shelocta, pa
Question radius arm bushings?

when i get on the brakes i get a clunk on the driverside floor. i think it's the radius arm bushing. how hard a fix is this and what would it set me back $$$?
Thanks ason
 
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Old Jul 8, 2004 | 09:38 AM
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Yes, it sounds like the bushings. I normally pull the axles forward enough to clear the radius arm from the rear bracket. A come-along works well. Take off old bushing and slide on new. Guide the radius arm back in the bracket while you release the come-along.

Good luck,

Mark
 
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Old Jul 8, 2004 | 11:57 AM
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Charles in AZ
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It makes the job a lot easier if you also pull the pivot bolts from the bushings on the suspension arm ends and let them drop down onto blocks. You won't need a come-along if you do this. While the arms are down, it's a good idea to check the condition of the pivot bushings as well. I use urethane aftermarket bushings in both locations; the stiffer bushings reduce steering wander and bump steer. The last set of bushings I bought (about 5 years ago) were about $60 a pair for either radius arm or pivot bushings of good quality. Replacing the bushings is not an easy job but it is pretty straightforward and well worth the effort.
 
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Old Jul 8, 2004 | 10:16 PM
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MontanaFord
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From: Kalispell, MT
another good idea, and i know a number of people that have done this (also, i have the driver side done, and will do the pass. side in the near future)...is cut out the rivets that hold the radius arm bracket to the frame, and replace the rivets with Grade 8 bolts...they will hold just as well, if not better, and will make replacing the bushings at any time in the future MUCH easier than trying to pull the whole radius arm forward of the bracket...just unbolt, drop the bracket, and swap bushings...the reason i started the whole project is because my rivets had started wearing for some reason, and the bracket had started moving, causing a CLUNK under the floorboards any time i hit the brakes...now that i have bolts in place of the rivets, and they are nicely tightened down, no CLUNK...next big front end project is the wheel bearings...hehehe...wish me luck...

MontanaFord
 
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Old Jul 9, 2004 | 05:04 AM
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wrenchturner
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From: shelocta, pa
I THINK I'LL TAKE OUT THE RIVETS CUZ I MIGHT GET SOME DROP BRACKETS SOON AND LIFT THIS *****. I'm gonna go to bronco grave yard for the bushings thanks for the help
 
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Old Jul 9, 2004 | 11:24 PM
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MontanaFord
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From: Kalispell, MT
is it safe to assume that you will be replacing the rivets you remove with bolts?? if so...make sure you use grade 8's, as they will not sheer off as easily as grade 5's would...8's are a gold-ish color, 5's are the reg. silver color, and 10's are red....8's are what i've been told to use when i replace my rivets....

MontanaFord
 
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Old Jul 10, 2004 | 11:24 AM
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kspilkinton
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From: South Kitsap County, WA
Check the head of the bolt for the SAE markings for the grade. IIRC its one mark at each point of the hex and a triangle in the middle.

-Kerry
 
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