This site is not affiliated with AGCO Inc., Duluth GA., Allis-Chalmers Co., Milwaukee, WI., or any surviving or related corporate entity. All trademarks remain the property of their respective owners. All information presented herein should be considered the result of an un-moderated public forum with no responsibility for its accuracy or usability assumed by the users and sponsors of this site or any corporate entity.
The Forum Parts and Services Unofficial Allis Store Tractor Shows Serial Numbers History
Forum Home Forum Home > Allis Chalmers > Farm Equipment
  New Posts New Posts
  FAQ FAQ  Forum Search   Events   Register Register  Login Login


CA trans swap into a Model B/C
 Post Reply Post Reply
Author
Message
  Topic Search Topic Search  Topic Options Topic Options
KMAG View Drop Down
Orange Level Access
Orange Level Access


Joined: 26 May 2020
Location: Elizabethtown,
Points: 671 		Post Options Post Options   Thanks (0) Thanks(0)   Quote KMAG Quote  Post ReplyReply Direct Link To This Post Topic: CA trans swap into a Model B/C
    Posted: 10 Jul 2021 at 7:12am
There have been a number of posts about it being possible. A post said everything bolts up, but there is something different about the CA final drive castings vs B/C that causes a problem sliding them into the CA trans.

Has anyone on here DONE this conversion? If so, please share your experience. Thank you.




Edited by KMAG - 10 Jul 2021 at 8:54am
Back to Top
Sponsored Links


Back to Top
steve(ill) View Drop Down
Orange Level Access
Orange Level Access
Avatar

Joined: 11 Sep 2009
Location: illinois
Points: 81679 		Post Options Post Options   Thanks (0) Thanks(0)   Quote steve(ill) Quote  Post ReplyReply Direct Link To This Post Posted: 10 Jul 2021 at 8:48am
The B and C final drives bolt to the differential case with 4 studs. The pattern is perpendicular to the ground.. I believe the CA the bolt pattern is canted backward slightly. STill bolt up, but the wheel base ends up being a few inches longer. ......... also remember the CA uses a different hydraulic pump than the B / C ... not interchangable.... Change the pto case if you want the NEW PUMP ..... trans OK.

Edited by steve(ill) - 20 Jul 2021 at 3:32pm
Like them all, but love the "B"s.
Back to Top
steve(ill) View Drop Down
Orange Level Access
Orange Level Access
Avatar

Joined: 11 Sep 2009
Location: illinois
Points: 81679 		Post Options Post Options   Thanks (0) Thanks(0)   Quote steve(ill) Quote  Post ReplyReply Direct Link To This Post Posted: 10 Jul 2021 at 8:54am
I guess if your trying to put B final drives on a CA, that should be OK... If you trying to put a CA transmission in a B, get the pto case / hydraulic pump also.

Edited by steve(ill) - 20 Jul 2021 at 3:32pm
Like them all, but love the "B"s.
Back to Top
KMAG View Drop Down
Orange Level Access
Orange Level Access


Joined: 26 May 2020
Location: Elizabethtown,
Points: 671 		Post Options Post Options   Thanks (0) Thanks(0)   Quote KMAG Quote  Post ReplyReply Direct Link To This Post Posted: 10 Jul 2021 at 8:57am
I am looking into a 4 speed B. I like the B's smaller size, but need higher road speed to join tractor drives (10mph req) and it makes driving to local shows (w/in 8mls of home) quicker.
Back to Top
steve(ill) View Drop Down
Orange Level Access
Orange Level Access
Avatar

Joined: 11 Sep 2009
Location: illinois
Points: 81679 		Post Options Post Options   Thanks (0) Thanks(0)   Quote steve(ill) Quote  Post ReplyReply Direct Link To This Post Posted: 10 Jul 2021 at 9:14am
YEP... put 12.4 tires on it also.
Like them all, but love the "B"s.
Back to Top
Alex09(WI) View Drop Down
Orange Level
Orange Level
Avatar

Joined: 15 Mar 2012
Location: CECIL WI
Points: 1701 		Post Options Post Options   Thanks (1) Thanks(1)   Quote Alex09(WI) Quote  Post ReplyReply Direct Link To This Post Posted: 10 Jul 2021 at 11:24am
I have swapped a CA trans into a C tractor myself. Customer needed higher raod speed for tractor drives. I raced my WD45 with the C after the 4-speed conversion and I barely went faster at stock throttle setting.

It is a direct interchange EXCEPT FOR THE DIFFERENTIAL BEARING CARRIERS!! The B/C axle housings are smaller on the ID where they bolt up to the transmisssion. You have 2 options: Grind the inside of axle housing out so they slide over the CA carriers, OR turn the OD of the CA bearing carriers down 1/8" so they are the same size as the B/C carriers and the axle will bolt on without interfering. Can't remember what I did for the PTO housing.
www.awtractor.com
A&W TRACTOR 920-598-1287
KEEPING ALLIS-CHALMERS IN THE FIELDS THROUGH THE 21ST CENTURY
Back to Top
PaulB View Drop Down
Orange Level
Orange Level


Joined: 12 Sep 2009
Location: Rocky Ridge Md
Points: 4775 		Post Options Post Options   Thanks (0) Thanks(0)   Quote PaulB Quote  Post ReplyReply Direct Link To This Post Posted: 10 Jul 2021 at 3:26pm
Also I think the seat rails and footbars are different widths, at least the CA foot is a bent angle vs the B/C square box. The difference in the slant of the CA final drives is all in the axle housing. The B/C PTO will go onto the CA transmission if you use the B/C sliding drive gear. Johnny Cash will be proud of you Big smile
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
Back to Top
Jgranat View Drop Down
Bronze Level
Bronze Level


Joined: 25 Mar 2019
Location: NW PA
Points: 115 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Jgranat Quote  Post ReplyReply Direct Link To This Post Posted: 11 Jul 2021 at 10:41pm
My first CA had a B PTO on it, I think it was you Paul who pointed it out to me, that was 20+ years ago....thanks by the way.
Back to Top
HudCo View Drop Down
Orange Level
Orange Level
Avatar

Joined: 29 Jan 2013
Location: Plymouth Utah
Points: 3598 		Post Options Post Options   Thanks (0) Thanks(0)   Quote HudCo Quote  Post ReplyReply Direct Link To This Post Posted: 12 Jul 2021 at 10:31pm
i am watching this post as i am working on a c right now
Back to Top
CTuckerNWIL View Drop Down
Orange Level
Orange Level
Avatar

Joined: 11 Sep 2009
Location: NW Illinois
Points: 22823 		Post Options Post Options   Thanks (0) Thanks(0)   Quote CTuckerNWIL Quote  Post ReplyReply Direct Link To This Post Posted: 20 Jul 2021 at 11:51am
Originally posted by steve(ill) steve(ill) wrote:

YEP... put 12.4 tires on it also.
13.6 will be a bit fast or step up to 14.9''s. Dad had 14.9's on his CA from the first time he tried discing plowed ground. They stayed on for 40 years anyway.
http://www.ae-ta.com
Lena 1935 WC12xxx, Willie 1951 CA6xx Dad bought new, 1954WD45 PS, 1960 D17 NF
Back to Top
Alex09(WI) View Drop Down
Orange Level
Orange Level
Avatar

Joined: 15 Mar 2012
Location: CECIL WI
Points: 1701 		Post Options Post Options   Thanks (1) Thanks(1)   Quote Alex09(WI) Quote  Post ReplyReply Direct Link To This Post Posted: 20 Jul 2021 at 2:10pm



www.awtractor.com
A&W TRACTOR 920-598-1287
KEEPING ALLIS-CHALMERS IN THE FIELDS THROUGH THE 21ST CENTURY
Back to Top
IBWD MIke View Drop Down
Orange Level
Orange Level
Avatar

Joined: 08 Apr 2012
Location: Newton Ia.
Points: 3775 		Post Options Post Options   Thanks (0) Thanks(0)   Quote IBWD MIke Quote  Post ReplyReply Direct Link To This Post Posted: 21 Jul 2021 at 8:14am
I've got the CA tranny if one of you gentlemen wants to give this a try!
Back to Top
corbinstein View Drop Down
Orange Level
Orange Level


Joined: 31 Jul 2014
Location: Oklahoma
Points: 796 		Post Options Post Options   Thanks (0) Thanks(0)   Quote corbinstein Quote  Post ReplyReply Direct Link To This Post Posted: 22 Jul 2021 at 6:28am
So my question is this, will it slow down a B/C in first?
Back to Top
IBWD MIke View Drop Down
Orange Level
Orange Level
Avatar

Joined: 08 Apr 2012
Location: Newton Ia.
Points: 3775 		Post Options Post Options   Thanks (0) Thanks(0)   Quote IBWD MIke Quote  Post ReplyReply Direct Link To This Post Posted: 22 Jul 2021 at 8:02am
Originally posted by corbinstein corbinstein wrote:

So my question is this, will it slow down a B/C in first?

Tractor data says 1st gear for 'B', 2.5 MPH, 'CA', 2.0 MPH.
Back to Top
steve(ill) View Drop Down
Orange Level Access
Orange Level Access
Avatar

Joined: 11 Sep 2009
Location: illinois
Points: 81679 		Post Options Post Options   Thanks (0) Thanks(0)   Quote steve(ill) Quote  Post ReplyReply Direct Link To This Post Posted: 22 Jul 2021 at 8:04am
TRACTOR DATA 
shows the B as 2.5 mph in first and 7.5 mph in 3rd...
shows the CA as 2 mph in first and 11.2 mph in 4th.

some of that depends on what the final drive ratios are..


Edited by steve(ill) - 22 Jul 2021 at 8:04am
Like them all, but love the "B"s.
Back to Top
Alex09(WI) View Drop Down
Orange Level
Orange Level
Avatar

Joined: 15 Mar 2012
Location: CECIL WI
Points: 1701 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Alex09(WI) Quote  Post ReplyReply Direct Link To This Post Posted: 22 Jul 2021 at 10:02am
I thought I researched this before. Using the CA transmission and the B/C axles, you have faster speeds, than with the CA axles.
www.awtractor.com
A&W TRACTOR 920-598-1287
KEEPING ALLIS-CHALMERS IN THE FIELDS THROUGH THE 21ST CENTURY
Back to Top
TramwayGuy View Drop Down
Orange Level Access
Orange Level Access


Joined: 19 Jan 2010
Location: Northern NY
Points: 11446 		Post Options Post Options   Thanks (0) Thanks(0)   Quote TramwayGuy Quote  Post ReplyReply Direct Link To This Post Posted: 22 Jul 2021 at 11:38am
“ have swapped a CA trans into a C tractor myself. Customer needed higher road speed for tractor drives.”

Isn’t 3rd gear on a C the same as 4th on a CA? Both direct drive?

Seems like the final drives might be a more fruitful approach.
Back to Top
PaulB View Drop Down
Orange Level
Orange Level


Joined: 12 Sep 2009
Location: Rocky Ridge Md
Points: 4775 		Post Options Post Options   Thanks (0) Thanks(0)   Quote PaulB Quote  Post ReplyReply Direct Link To This Post Posted: 22 Jul 2021 at 2:42pm
4th in a CA is overdrive. The final drive ratio in a CA is slowest of the three the B is the fastest. The C is slower than a B by a slight bit.
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
Back to Top
steve(ill) View Drop Down
Orange Level Access
Orange Level Access
Avatar

Joined: 11 Sep 2009
Location: illinois
Points: 81679 		Post Options Post Options   Thanks (0) Thanks(0)   Quote steve(ill) Quote  Post ReplyReply Direct Link To This Post Posted: 22 Jul 2021 at 3:05pm
So by putting B finals on a CA 4 speed, you dont get much mph reduction ( if any) on the bottom end, but in 4th you would be FASTER than the CA ?
Like them all, but love the "B"s.
Back to Top
 Post Reply Post Reply
  Share Topic   

Forum Jump Forum Permissions View Drop Down

Forum Software by Web Wiz Forums® version 11.10
Copyright ©2001-2017 Web Wiz Ltd.

This page was generated in 0.066 seconds.


Help Support the
Unofficial Allis Forum