Rag Joint Trouble
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Freshman User
Joined: Jul 2006
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Rag Joint Trouble
Hello All, I have a '78 150 that I'm attempting to replace the rag joint on. My shaft on the steering box is 3/4" and I've ordered a couple used and NOS rag joints (I've ordered a couple over the past month hoping the problem was a mix up in part numbers). I have the same problem with each one I've gotten. They measure in at 11/16". Everybody that I've purchased from tells me this is for a 3/4" shaft. I don't feel that persuading it with a hammer is the right thing to do because I don't see where there is any room for expansion the way these are built. Has anybody else ever experienced this problem? Is it possible they are intended to be pressed on? Thanks, Brian
Senior User
Joined: Jun 2010
Posts: 347
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From: Kempner/Waco, TX
you could always just order a vibration damper from summit...
Vibration damper - Steering U-Joints - SummitRacing.com
find the one that you need
or
a rag joint from summit
Rag joint - Steering U-Joints - SummitRacing.com
Vibration damper - Steering U-Joints - SummitRacing.com
find the one that you need
or
a rag joint from summit
Rag joint - Steering U-Joints - SummitRacing.com
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
Likes: 787
From: Simi Valley, CA
Hello All, I have a '78 F 
150 that I'm attempting to replace the rag joint on.
My shaft on the steering box is 3/4" and I've ordered a couple used and NOS rag joints (I've ordered a couple over the past month hoping the problem was a mix up in part numbers).
I have the same problem with each one I've gotten. They measure in at 11/16". Everybody that I've purchased from tells me this is for a 3/4" shaft. I don't feel that persuading it with a hammer is the right thing to do because I don't see where there is any room for expansion the way these are built.
150 that I'm attempting to replace the rag joint on. My shaft on the steering box is 3/4" and I've ordered a couple used and NOS rag joints (I've ordered a couple over the past month hoping the problem was a mix up in part numbers).
I have the same problem with each one I've gotten. They measure in at 11/16". Everybody that I've purchased from tells me this is for a 3/4" shaft. I don't feel that persuading it with a hammer is the right thing to do because I don't see where there is any room for expansion the way these are built.
Here's the reason why you keep buying the wrong part: 1978 F150: There are FOUR different steering couplers (rag joints).
D6TZ-3A525-A = 1978 F150 4WD with Manual Steering,
D9TZ-3A525-A = 1978/79 F150 4WD with Power Steering.
D8TZ-3A525-A = 1978/79 F100/350 2WD with Power Steering.
D8TZ-3A525-D = 1978/79 F100/350 2WD with Manual Steering.
So, which one of the above matches your truck?
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