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Michael V (NM) 
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Joined: 12 Sep 2009
Location: NM
Points: 2512
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 Topic: C-CA confusion
Posted: 30 Nov 2025 at 12:21pm |
check the link,, this some kind of frankenstien?
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steve(ill)
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Joined: 11 Sep 2009
Location: illinois
Points: 88955
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Posted: 30 Nov 2025 at 12:28pm |
if it has spin outs and a 4 speed.... its a CA
does not have a platform.... but one photo of the right rear looks like a CA hyd pump.
Edited by steve(ill) - 30 Nov 2025 at 12:34pm
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Like them all, but love the "B"s.
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Michael V (NM)
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Joined: 12 Sep 2009
Location: NM
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Posted: 30 Nov 2025 at 12:52pm |
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I guess it not having the platform is what is throwing me off..and no hand clutch,, yea, I know some don't have the hand clutch.....
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Gary Burnett
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Location: Virginia
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Posted: 30 Nov 2025 at 8:33pm |
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Definitely a CA
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AC720Man
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Location: Shenandoah, Va
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Posted: 30 Nov 2025 at 9:23pm |
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I agree Gary, CA
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1968 B-208, 1976 720 (2 of them)Danco brush hog, single bottom plow,52" snow thrower, belly mower,rear tine tiller, rear blade, front blade, 57"sickle bar,1983 917 hydro, 1968 7hp sno-bee, 1968 190XTD
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HoughMade
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Joined: 22 Sep 2017
Location: Valparaiso, IN
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Posted: Yesterday at 1:24pm |
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I am currently in the middle of putting a CA transmission in my B. I doubt I'm the first.
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1951 B
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IBWD MIke
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Joined: 08 Apr 2012
Location: Newton Ia.
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Posted: 10 hours 24 minutes ago at 6:29am |
 HoughMade wrote:
I am currently in the middle of putting a CA transmission in my B. I doubt I'm the first. |
Hmmm, I have a spare transmission from a CA. Now if I had a B.....
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Gary Burnett
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Location: Virginia
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Posted: 9 hours 54 minutes ago at 6:59am |
HoughMade wrote:
I am currently in the middle of putting a CA transmission in my B. I doubt I'm the first. |
Makes for a much more user friendly B,wish I'd of had a 4 speed in the B I used to cultivate corn with back in the day.
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HoughMade
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Posted: 7 hours 6 minutes ago at 9:47am |
I'm hoping so.
Also, I need the road gear to get it up to the speed needed to do the Mackinac Bridge Vintage Tractor Crossing which is a goal of mine- using my Dad's B, which was also the kind of tractor (though not THE tractor) that my Grandpa started with when he bought his farm.
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1951 B
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steve(ill)
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Location: illinois
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Posted: 4 hours 10 minutes ago at 12:43pm |
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Hough, i thought the 4 speed had a lower low gear and just a little different in high (4th compared to 3rd in the B) ?? Do you know the final drive gear ratios of the B compared to the CA ?? What road speed are you trying to get ?
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Like them all, but love the "B"s.
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HoughMade
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Posted: 2 hours 14 minutes ago at 2:39pm |
I did the math, but it's been a while. I will look for my figures.
I need to be able to sustain 10 mph. A stock B, and mine runs great, does just under 8 mph in 3rd. My math got me to about 14.5 mph at 1,600 rpm using the CA transmission and B finals (yes, the bolt up).
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1951 B
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steve(ill)
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Posted: 54 minutes ago at 3:59pm |
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Dr once post that the B had a 27-22 gear too reduction and the CA had a 47 -24 tooth reduction in the trans in high gear.. 1.227 vs 1.958... so your right, about 50% faster..
Edited by steve(ill) - 53 minutes ago at 4:00pm
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Like them all, but love the "B"s.
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Les Kerf
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Joined: 08 May 2020
Location: Idaho
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Posted: 47 minutes ago at 4:07pm |
Now that I own a Model CA (and three C's) I was recently perusing the parts books on the AGCO site and noticed that they listed the tooth counts for the transmission.
Model CA: 1st - 18/50 - 2.778:1 2nd- 26/41 - 1.577:1 3rd - 30/37 - 1.233:1 4th - 49/24 - 0.490:1
CA Differential: 6/37 - 6.167:1
CA Final Drive: 13/77 - 5.923:1
CA Overall Ratios: 1st - 101.5:1 2nd- 57.6:1 3rd - 45:1 4th - 17.9:1
Model B/C 1st - 14/35 - 2.50:1 2nd- 19/26(?) - 1.37:1 3rd - 27/22 - 0.815:1
B/C Differential 7/37 - 5.286:1
B Finals: 14/67 - 4.786:1
B Overall Ratios: 1st - 63.2:1 2nd- 34.7:1 3rd - 20.6:1
CA transmission with B Finals: 4th Overall: 14.5:1
Edited by Les Kerf - 37 minutes ago at 4:17pm
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steve(ill)
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Location: illinois
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Posted: 36 minutes ago at 4:18pm |
OK... so a standard CA would be about 50% faster than a B... 12 mph vs 8 ??? But if you retained the B finals and bevel gear , with the NEW CA trans , you would get maybe 30% more .. so that would get you up to the 15 MPH range ? ( just looking at the numbers in my head.. not actual calc)..
so depending on the rated engine speed.... i think Hough is right on his calcs..
Edited by steve(ill) - 32 minutes ago at 4:22pm
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Like them all, but love the "B"s.
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