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CA transmission in a B
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skeeters65 View Drop Down
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Joined: 09 Jul 2015
Location: CT
Points: 371 		Post Options Post Options   Thanks (0) Thanks(0)   Quote skeeters65 Quote  Post ReplyReply Direct Link To This Post Topic: CA transmission in a B
    Posted: 12 Sep 2015 at 8:18am
I think I have read that this is a direct bolt in.
Is that true?
The CA is a 4sp correct? What is the top speed of a CA compared to a B's 7mph?

Thanks
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Ted in NE-OH View Drop Down
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Joined: 12 Nov 2009
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Points: 1703 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Ted in NE-OH Quote  Post ReplyReply Direct Link To This Post Posted: 12 Sep 2015 at 8:54am
At rated RPM (not max) the B is 8mph and the CA is 11.25 mph according to Terry Deans tractor data book.
CA, WD, C, 3 Bs, 2 Gs, WC, I-400, 914
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skeeters65 View Drop Down
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Points: 371 		Post Options Post Options   Thanks (0) Thanks(0)   Quote skeeters65 Quote  Post ReplyReply Direct Link To This Post Posted: 12 Sep 2015 at 9:16am
Is the CA a direct bolt in in the B?
Do you lose any low end power by doing this swap?
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Charlie175 View Drop Down
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Joined: 11 Sep 2009
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Points: 6369 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Charlie175 Quote  Post ReplyReply Direct Link To This Post Posted: 12 Sep 2015 at 9:30am
you would gain pulling power by better gearing.
My CA will easily output my B
Charlie

'48 B, '51 CA, '56 WD45 '61 D17, '63 D12, '65 D10 , '68 One-Ninety XTD
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sandman2234 View Drop Down
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Joined: 21 Feb 2013
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Points: 2547 		Post Options Post Options   Thanks (0) Thanks(0)   Quote sandman2234 Quote  Post ReplyReply Direct Link To This Post Posted: 12 Sep 2015 at 9:46am
Rather than change the transmission, I see a good excuse to go buy a CA tractor if you need something with a little more speed!!
   David from jax
A proud member of the Allis Express movement!
               Northeast Florida
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AJ View Drop Down
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Points: 5244 		Post Options Post Options   Thanks (0) Thanks(0)   Quote AJ Quote  Post ReplyReply Direct Link To This Post Posted: 12 Sep 2015 at 10:07am
Yes. It would be a bolt in if you want to go through the work of doing it.
Can't fix stupid
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DougS View Drop Down
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Joined: 03 Nov 2011
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Points: 2490 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DougS Quote  Post ReplyReply Direct Link To This Post Posted: 12 Sep 2015 at 10:24am
If the motor I the problem in the CA you'd be better off putting a B motor in a CA.
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DonBC View Drop Down
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Joined: 12 Sep 2009
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Points: 945 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DonBC Quote  Post ReplyReply Direct Link To This Post Posted: 12 Sep 2015 at 11:53am
If the the top gear is straight through on both transmissions then the top speed would be the same for both transmissions.
Jack of all trades, master of none
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Dick L View Drop Down
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Joined: 12 Sep 2009
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Points: 5087 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Dick L Quote  Post ReplyReply Direct Link To This Post Posted: 12 Sep 2015 at 2:03pm
It would be a direct bolt in but you can't compare data sheets to come up with mph speeds. The testing published in a data sheet would have been done on different size tires on the B than the CA.
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CTuckerNWIL View Drop Down
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Joined: 11 Sep 2009
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Points: 22825 		Post Options Post Options   Thanks (0) Thanks(0)   Quote CTuckerNWIL Quote  Post ReplyReply Direct Link To This Post Posted: 12 Sep 2015 at 2:16pm
Also, the early B's had a lower RPM than the CA if I am not mistaken. 
http://www.ae-ta.com
Lena 1935 WC12xxx, Willie 1951 CA6xx Dad bought new, 1954WD45 PS, 1960 D17 NF
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Bill Long View Drop Down
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Points: 4556 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Bill Long Quote  Post ReplyReply Direct Link To This Post Posted: 12 Sep 2015 at 3:32pm
Dick L and Charlie,  Very good!! 
If I recall from memory - and it is not all that good - the late B's had about 1500 rpm the earlier B's had less, while the CA engine has at least 1650 perhaps more rpms.
However, you would get some benefits with a lower gear and a higher gear and the helical gear transmission.
Let us know how it goes.
Good Luck!
Bill Long


Edited by Bill Long - 12 Sep 2015 at 3:33pm
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tadams(OH) View Drop Down
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Joined: 17 Sep 2009
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Points: 10918 		Post Options Post Options   Thanks (0) Thanks(0)   Quote tadams(OH) Quote  Post ReplyReply Direct Link To This Post Posted: 12 Sep 2015 at 3:58pm
If your changing rear end and all you will be gaining hydralic, different hitch and spin out wheels.
Tom
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sandman2234 View Drop Down
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www.tractordata.com has basically the same info that Ted mentioned. A(7 to 11 mph). Since both use 24 inch tires, roughly the same height, I would think that something else is causing the difference. The RPM's definitely a difference, but what about the bull gears in the finals?  I know there are different tooth configurations in the B and C history, so wondering if that is also a factor.
  David from jax
  
A proud member of the Allis Express movement!
               Northeast Florida
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Dick L View Drop Down
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Joined: 12 Sep 2009
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Points: 5087 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Dick L Quote  Post ReplyReply Direct Link To This Post Posted: 12 Sep 2015 at 4:50pm
Originally posted by sandman2234 sandman2234 wrote:

www.tractordata.com has basically the same info that Ted mentioned. A(7 to 11 mph). Since both use 24 inch tires, roughly the same height, I would think that something else is causing the difference. The RPM's definitely a difference, but what about the bull gears in the finals?  I know there are different tooth configurations in the B and C history, so wondering if that is also a factor.
  David from jax
  


Both 24 inch rims but the wider the tire the taller they are which makes them farther around or faster at the same rpm.
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PaulB View Drop Down
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Points: 5108 		Post Options Post Options   Thanks (0) Thanks(0)   Quote PaulB Quote  Post ReplyReply Direct Link To This Post Posted: 12 Sep 2015 at 6:32pm
The CA transmission will bolt into a B or C. I've seen this done a few times. I agree with those above that if you want a 4 speed little tractor this would be a good reason to get a CA. The foot rest bar and seat mounting will need to be modified. The reason a CA will out pull a B or C at the same weight has more to do with the slanted back final drives and the longer wheelbase which gives better balance. Not only are the transmission ratios different the ring an pinion and final drive ratios are also.
If it was fun to pull in LOW gear, I could have a John Deere.
Real pullers don't have speed limits.
If you can't make it GO... make it SHINY
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Ken in Texas View Drop Down
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Points: 5919 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Ken in Texas Quote  Post ReplyReply Direct Link To This Post Posted: 13 Sep 2015 at 7:17pm
Thanks Paul
The 4 speed CA is longer than the 3 speed B/C transaxle by 2 and 1/4 inches making other mods necessary. Will B finsls bolt to the CA TA?
Are the axle spines the same? Maybe easier to change from the clutch back if the B steering box bolts to the CA torque tube. Didn't late Bs use a CA Torque Tube tube?
I would have thought a shorter wheelbase would give better balance. Them short IBs sure pull good.
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