The Ford Barn

biggieou · 03-18-2025, 05:06 PM

I have a Columbia that I’m putting in my Model A. The banjo is Flathead era, which is fine. My question is related to the radius arms. The ones I have are two different lengths. Why would that be?

petehoovie · 03-18-2025, 06:08 PM

Quote:

Originally Posted by biggieou

I have a Columbia that I’m putting in my Model A. The banjo is Flathead era, which is fine. My question is related to the radius arms. The ones I have are two different lengths. Why would that be?

Bored&Stroked · 03-18-2025, 07:52 PM

My guess . . . two different years.

cas3 · 03-18-2025, 09:48 PM

my original thought too, but the different years are radically different, like by about 20 inches. I think, long ones 37-41, short ones 42-48. All should be equal length pairs to my knowledge.

TJ · 03-19-2025, 10:07 AM

It appears that there is a difference in the diameter of the two and there is difference in the thickness of the mounting plate where it goes to the torque tube. Both are from two different year cars. Were they bolted to the rear end when you got it?

Bored&Stroked · 03-19-2025, 10:09 AM

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I think you should show both ends of these . . . as they sure appear to be a mismatched set.

glennpm · 03-19-2025, 12:54 PM

They must be the same length. I'm in the process of starting another thread requesting years versus lengths.

Glenn

Kurt in NJ · 03-19-2025, 01:51 PM

What was done to the housings to make them fit the A, are they both narrowed to match the A, what axle shafts are you using? The 33-34 shafts would come out to the same width as the A
If 2 different length housings were used the radius rods would be a different length and it would have 2 different length axles

03-18-2025, 07:52 PM	#3
Bored&Stroked Senior Member Join Date: Jan 2011 Location: Central Ohio Posts: 5,723	Re: Rear end question My guess . . . two different years.

03-18-2025, 09:48 PM	#4
cas3 Senior Member Join Date: Jan 2011 Location: Beverly Kansas Posts: 5,301	Re: Rear end question my original thought too, but the different years are radically different, like by about 20 inches. I think, long ones 37-41, short ones 42-48. All should be equal length pairs to my knowledge.

03-19-2025, 10:07 AM	#5
TJ Senior Member Join Date: May 2010 Location: Napa,California Posts: 6,566	Re: Rear end question It appears that there is a difference in the diameter of the two and there is difference in the thickness of the mounting plate where it goes to the torque tube. Both are from two different year cars. Were they bolted to the rear end when you got it?

03-19-2025, 10:09 AM	#6
Bored&Stroked Senior Member Join Date: Jan 2011 Location: Central Ohio Posts: 5,723	Re: Rear end question Sponsored Links (Register now to hide all advertisements) I think you should show both ends of these . . . as they sure appear to be a mismatched set.

03-19-2025, 12:54 PM	#7
glennpm Senior Member Join Date: Sep 2014 Location: Mid-Coast Maine Posts: 2,815	Re: Rear end question They must be the same length. I'm in the process of starting another thread requesting years versus lengths. Glenn

03-19-2025, 01:51 PM	#8
Kurt in NJ Senior Member Join Date: May 2010 Location: on the Littlefield Posts: 6,555	Re: Rear end question What was done to the housings to make them fit the A, are they both narrowed to match the A, what axle shafts are you using? The 33-34 shafts would come out to the same width as the A If 2 different length housings were used the radius rods would be a different length and it would have 2 different length axles