old
Well-known Member
- Location
- Camdenton Missouri
The 661 transmission would be a 5 speed not a 4 speed
used red MN
Well-known Member
- Location
- Coon Rapids, MN
On the clutch housing at the location below the battery as shown by the arrow. (the point of the arrow is a bit low on the photo) If the 641 came from that spot show the others stamped numbers below it. Post some photos of the whole tractor from both sides and maybe the back as well.
Sorry missed a greeting for you “welcome to YT!
Last edited:
Andy Wickiser
Member
For comparison below are pictures of the normal 4-speed non-live setup taken from my Ford 840 but it should be similar on a 641. Also I've included a picture from the 601/801 operator's manual of the live PTO setup and operation. It looks like you have a four speed transmission in a 5-speed case with internal dual-clutch hardware - note pedal pivot location moved to the rear, clutch pedal appearance, and forward operating mechanism. My guess is that you have a prototype from Ford that eventually was sold off, note it was stamped 641 at the factory so unlikely this was someone's aftermarket tinkering.
Steve in IL
Member
Perhaps I don’t understand the mechanical parts that enable a 5 speed transmission to use a 2 stage clutch, but I see no way that a 4 speed transmission can act like this. Based on the Ford parts book, there is only one input spline on a 4 speed. So the shaft is either engaged or not. But with a 5 speed (whole different design), there are 2 different input splines (so 1 plate/stage of the clutch runs one, and the other plate runs the other).
Without that feature, I just do not see how a 2 stages clutch can effectively be used. Perhaps those that have worked a lot on these transmissions can tell us if the 2 inputs spline parts can be fitted into the input side of the 4 speed.
Without that feature, I just do not see how a 2 stages clutch can effectively be used. Perhaps those that have worked a lot on these transmissions can tell us if the 2 inputs spline parts can be fitted into the input side of the 4 speed.
shaun wallace
Well-known Member
- Location
- Stith, Jones County Texas
The front wall in trans is in different distance from buckleup on 4 speed and 5 speed. If has a lot of southern engineering done.
Thanks
Steve in IL
Member
Looks like a really nice later 641 to me. One interesting thing is that it has the clutch rod (rod from the pedal to the clutch arm) of a single stage clutch.
KCTractors
Well-known Member
- Location
- Central Wi
Danny6072, That sure looks like a 641 all the way. I just can't see how that could have a Live PTO. Those rear axle lug nuts are worth some money to somebody that may want to install the pie-weights. They are used to install weight carrier between the wheel center and the carrier itself.
Unfortunately it does not run at the moment so I can’t demonstrate to dual clutch but the guy I bought it from said that is how it works, he bought if from someone about 5-6 years ago and he is supposed to check with him to see what he has done to make the happen
When I find out I will repost here to let yawl know
When I find out I will repost here to let yawl know
Fordfarmer
Well-known Member
Fordfarmer
Well-known Member
I think the seller just want it to sound more useful/valuable than it is. Everything about it says 641/non-live PTO to me. I don't know of any way to put a double clutch and the matching double input shafts into a 4 speed transmission case. It would also need different gears to move power from the input shaft to the PTO output shaft.
Someone mentioned the pivot point of the clutch pedal being different than an 840. What you have is correct for a 641 (or 841).
Jim.ME
Well-known Member
- Location
- Central Maine
To clarify.
Currently from your post (#30) it now sounds to me like you bought the tractor not running; so, everything you have said about how the clutch works is just repeating what the seller told you. If this is correct you should have told us that you bought it not running, in your first post. From your prior posts it sounded like you had run it, and the pictures look like it would be a running tractor.
If that is true until you have it running and can put an implement on the PTO and prove it is a two stage, it is a seller's story.
What is needed to get it running? That should be your first task and would end this speculation one way or the other.
Currently from your post (#30) it now sounds to me like you bought the tractor not running; so, everything you have said about how the clutch works is just repeating what the seller told you. If this is correct you should have told us that you bought it not running, in your first post. From your prior posts it sounded like you had run it, and the pictures look like it would be a running tractor.
If that is true until you have it running and can put an implement on the PTO and prove it is a two stage, it is a seller's story.
What is needed to get it running? That should be your first task and would end this speculation one way or the other.
I don’t think so I paid $500 for it
Andy Wickiser
Member
Yeah you're right funny how I've never seen that mentioned in the list of changes from the 600/800 series to the601/801 series. I agree the tractor is probably a regular 641 with single stage clutch.
Jim.ME
Well-known Member
- Location
- Central Maine
You do not need to remove any posts. Just start fresh. Get it running first. Do you have an idea of why it won't run? Does the engine turn freely with the starter?
From the looks of the pictures in your post #26, it is worth more than $500 so you didn't get hurt in that manner.
Bob NY
Member
Neutral in the 5 speed is up and down. The 4 speed transmission cover doesn't work that way.
sweetskillsrk
Member
$500?!?! Yeah, I'd say you did just fine! Nice looking tractor! Hopefully it won't be much to get it running.
We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today.
Copyright © 1997-2025 Yesterday's Tractor Co.
All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.
Yesterday's Tractors - Antique Tractor Headquarters
Website Accessibility Policy