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Old 04-23-2009, 11:40 AM
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Radius 23 T - rear

Had my drive shaft shortened. The mechanic tightened the rear radius at the frame. Does anyone know the proper amount of play to allow the radius arms to pivot with the rear end/shocks?

Thanks....

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Old 04-23-2009, 01:23 PM
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Is there a bearing of some sort at the attachment point on the frame?
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Old 04-23-2009, 03:32 PM
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Radius

No bearings - just a bolt and a nut with flanges on both sides. My inclination is to keep the nut loose enough so that the radius rods can pivot freely up and down as the axle housing moves with the shocks. Sound about right?
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Old 04-23-2009, 03:51 PM
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Quote:
Originally Posted by 23 Steel T
No bearings - just a bolt and a nut with flanges on both sides. My inclination is to keep the nut loose enough so that the radius rods can pivot freely up and down as the axle housing moves with the shocks. Sound about right?
NO sorry but that just ain't right. You should have a heim joint there to pivot on. That bolt is not going to last long as a pivot, then it will break and then it gets real ugly from there.
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Old 04-23-2009, 03:55 PM
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Radius -

Just had a visual, and ugly is an understatement. I assume I can find the heim joints @ Speedway?

THANK YOU!!
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Old 04-23-2009, 09:20 PM
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Is is possible to weld in a threaded bung onto the end of the trailing arm to allow you to install Heim joints? If you do go the Heim joint route, install greasable units and put seals on them if you want them to last any time at all on the street. Put a large OD washer on the outboard side of the Heim and under the bolt head to retain the joint if it should fail.

Is there solid structure on the frame (welded tube or something else to keep the frame from compressing when you tighten the attaching bolt on the heim).

If you are going to do it, do it right.

Andy

P.S. Post a photo of what it looks like now if you can.
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Old 04-24-2009, 11:49 AM
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Agreed

Still a little confused. I bought the radius ends from Speedway Motors which do not have bearings or resemble heims. I'll call their techs and find out why this set up is sold. I agree that over time, the bolts will fail and I''ll leave my rear end at a light some day. Any thoughts?
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Old 04-24-2009, 05:17 PM
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The typical radius rod you might buy from Speedway for a T would usually be threaded on the frame attachment end for a male heim, which would be sold separately. The ones on mine are threaded 5/8 x 20, and usually all right-handed threads. The heim might also come with the locknut, but if not, you would still want a lock nut anyway so make sure you get them.

Make sure after you install them that the joint can swivel freely and the outer case shell that contains the swivel does not contact the frame or the head of the bolt going through it, which will cause a bind and quickly destroy the heim. You can use washers to do this up to an extent. As mentioned before, use an oversize washer on the outside of the heim joint in case the ball pops out of the shell.
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Old 04-24-2009, 06:46 PM
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Sounds to me like you have clevis joints on your radius rods. They are for use with hairpins on the axle end. They don't move there and last forever. A moving joint has to have a bearing of some sort. You must already have either a threaded bung or stud on the rods for the clevis to fit on. I would just replace them with the appropriate heiom joint.
There is a special tapered washer to use with the heims to keep them togather when they do fail that also allows full movement of the joint.
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