Disc brake radius arms
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Cargo Master
Joined: May 2015
Posts: 2,350
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From: Garland, Tx
Disc brake radius arms
i know the question has been asked and answered, I just can’t find it.
Is there a left and right radius arm for the 73-79 disc brake front end?
Here’s why I ask, TIT snaked a curb in the green hornet and I took a front end apart and didn’t mark em.
Is there a left and right radius arm for the 73-79 disc brake front end?
Here’s why I ask, TIT snaked a curb in the green hornet and I took a front end apart and didn’t mark em.
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
Likes: 785
From: Simi Valley, CA
i know the question has been asked and answered, I just can’t find it.
Is there a left and right radius arm for the 73-79 disc brake front end?
No, R/L is the same...and disc brakes have nothing to do with it.
Here’s why I ask, TIT snaked a curb in the green hornet and I took a front end apart and didn’t mark em.
Is there a left and right radius arm for the 73-79 disc brake front end?
No, R/L is the same...and disc brakes have nothing to do with it.
Here’s why I ask, TIT snaked a curb in the green hornet and I took a front end apart and didn’t mark em.
There are several different types. Is this an F100, F150, F250 or F350? Regular, Crew or Super Cab?
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Cargo Master
Joined: May 2015
Posts: 2,350
Likes: 7
From: Garland, Tx
1969 f100 with a 1979 f150 disc brake, standard cab, long bed. The original arms have a drop in them near where the arms attach at the frame. One of the f150 arms appear to have a drop and one does not appear to have the same drop.
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
Likes: 785
From: Simi Valley, CA
1965/72 F100/250 2WD / 1969/73 E100/200 / 1973 F100 2WD / 1973 F250 2WD Regular/Crew Cab without front sway bar.
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D5TZ-3A360-A .. Radius Arm - R/L is the same / Obsolete
1974 F100 2WD / 1974 F250 2WD Regular/Crew Cab without front sway bar / 1974 E100/200 / 1975/79 F100/150 2WD & F250 2WD Regular/Crew Cab / 1975/79 F250 2WD Super Cab except with 8100 lbs. GVWR
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D5TZ-3A360-B .. Radius Arm - R/L is the same / Obsolete
1975/78 F350 / 1975/79 F250 2WD Super Cab with 8100 lbs. GVWR / 1979 F350 2WD
Lead Driver
Joined: Apr 2011
Posts: 6,399
Likes: 40
From: El Dorado, Arkansas
Only the lower shock mounting brackets (bolt-on items) are side specific. The arms will work on either side though.
'65-'73 radius arms are forged steel. '74-79 are stamped steel. '74 stamped steel radius arms have no notch in the forward end for a factory '75-'79 front swaybar endlink bracket (but, the notch can be added to them). All '75-'79 radius arms have the notch in the forward ends of the brackets for the addition of a '75-'79 factory front swaybar.
'65-'73 radius arms are forged steel. '74-79 are stamped steel. '74 stamped steel radius arms have no notch in the forward end for a factory '75-'79 front swaybar endlink bracket (but, the notch can be added to them). All '75-'79 radius arms have the notch in the forward ends of the brackets for the addition of a '75-'79 factory front swaybar.
Lead Driver
Joined: Jul 2011
Posts: 8,679
Likes: 191
From: On the Edge of the Desert
When I actually get around to swapping my discs, I'm going to keep the early forged radius arms just for reasons like this. I do believe them to be stronger and there are times when I'm pretty rough on the old beast.
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Lead Driver
Joined: Apr 2011
Posts: 6,399
Likes: 40
From: El Dorado, Arkansas
Yep. The radius arm on the left is bent.
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Lead Driver
Joined: Apr 2011
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From: El Dorado, Arkansas
The open "U" shaped channel faces outwards. Those are at least '75 model arms, as denoted by the notches at the forward ends of the arms. The radius arm on the right side of the truck will have the notch oriented at the bottom. The notch on the left arm will be oriented at the top when it's installed.
Lead Driver
Joined: Apr 2011
Posts: 6,399
Likes: 40
From: El Dorado, Arkansas
The radius arm that's bent in the photo is the one that should have been on the right side of the truck.
The lower shock mounts should be stamped "RH" and "LH".
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