(800) 853-2651
SHOP NOW

Ford 981-5 SOS Question

L

Lromero

New User
Hello Everyone,

I have a 981-5 SOS tractor that I have been working on. Got the carburetor cleaned and ran the tractor. Had all gear. Tractor started sputtering and needing the choke so I pulled it into the shop. Found 2 pinholes in the float. New float now and rebuilt the carburetor too. Engine runs great. I went to drive it and noticed I do not have 5-9 gears now. I have 1-4, 10 and R1. I didn't try R2.

I'm trying to find my manual, but is this symptoms of needing band adjustment? I'm going to see if I have a 300 or 500 psi gauge too.
 

If you've lost 5-8, B2 is not applying. 5-9 has no commonality without involving some other ratios. Are you positive that 9 does not function? This could be a small pin broken in the sequencing valve or band adjustment since B2 is mechanically applied.
 
(quoted from post at 17:08:22 07/18/21)
If you've lost 5-8, B2 is not applying. 5-9 has no commonality without involving some other ratios. Are you positive that 9 does not function? This could be a small pin broken in the sequencing valve or band adjustment since B2 is mechanically applied.
Click to expand...

I'd have e to count again to make sure, but certain it is 1-4 or 1-5 good. For certain 6-9 does not work. 9 has the most catch when letting off the pinching pedal, but feels to "let go". 6-8 has a slight nudge when letting off the pinching pedal, but very minimal. 10 does work. R1 and I just confirmed R2 does work.

I dropped the fluid, cleaned the screen, and refilled with fresh fluid. Ran it to see for any difference and no difference.
 
Confirmed 1-4 work. No 5-9.

The only thing I did do last time I used it was shift to P. I had never shifted to P before.

When shifting back down, when I get to 4 I can feel and hear a clunk and tractor rocks forward.
 

There's no real logical conclusion that would explain that scenario . . . unless you have two problems.

1. Band 2 is not applying.

2. If you have the original transmission and not the upgrade, your over-running clutch (ORC) is going bad and it's only showing in the faster ratios. The ORC is one of the components used in all the odd numbered, or direct drive, ratios. Later transmissions will have a direct drive clutch (DDC) rather than the ORC. You wouldn't know if 5 & 7 were slipping because of this problem because they're already gone due to B2 issues.

You can tell which transmission you have by looking on the left side about where your heel would be were you sitting in the seat. There are raised numbers on the housing there. 312259 would be the ORC, some call it the "red" transmission. C3NN-7006-B would be the upgrade DDC or "blue" transmission.
 
Larry, not trying to step on your toes at all especially since you know these
transmissions way-way more than me but there are a few rare early DDC transmissions
out there that have the earlier 312259 casting #s on them. I know they are very
rare but I have my dad's early 63 4000 that he bought new and it has the 312259
numbers but it is a DDC. The transmission has never been replaced or even any major
work done to it. I agree that almost all 312259's are the ORC versions tho and just
a very small amount of the hybrids are out there. Respectively Greg NE
 
312259 is the casting numbers.

Serial number of this tractor is 111723 which would be 1960 and 981-5.

This is only the 3rd time I've driven the tractor since I got it. Bought it in 2019 and picked it up early 2020. Sat in my shed until a few months ago when I started working on it. Got it running and was shocked when it shifted through all the gears when I first drove it. Put new float and was really not expecting it to not shift through all the gears. Nothing is ever easy as the saying goes.

This post was edited by Lromero on 07/18/2021 at 08:04 pm.
 
Yes! I should have noted that there are exceptions to this convention, but I think they're very few and far between. They must have just thrown those in randomly whenever a left over or reman case popped up. I have a late '62 4000 that already has the C0NN-7006-B, which was the first variant of the blue transmission, in it.

This post was edited by Larry NCKS on 07/19/2021 at 12:06 am.
 
For now I will do band adjustments and see what changes, if anything.

I'm not by the tractor, but are the PSI test ports 1/8" NPT?
 
Tightened up Band 2 and now have 5-9. Feels like the adjustment screw is all the way if that is such a thing. Screw doesn't go in anymore at least.
 
(quoted from post at 18:43:43 07/20/21)
Band 2 is not used in 9th.
Click to expand...

I see that in the troubleshooting chart of the I&T manual. But I do in fact have 9th now. I now have a slight noise in 4th that goes away at 5th through 8th and returns at 9th. Sort of like a hydraulic motor whine.

Band 3 bolt barely wants to turn in, but turns out easier. I didn't do any adjustments to Band 3.
 
(quoted from post at 21:01:00 07/20/21)
(quoted from post at 18:43:43 07/20/21)
Band 2 is not used in 9th.
Click to expand...

I see that in the troubleshooting chart of the I&T manual. But I do in fact have 9th now. I now have a slight noise in 4th that goes away at 5th through 8th and returns at 9th. Sort of like a hydraulic motor whine.

Band 3 bolt barely wants to turn in, but turns out easier. I didn't do any adjustments to Band 3.
Click to expand...

Are you following the band adjustment procedure in the book? If not you may now have B2 too tight.
 

Yea sir. Screwed in a good ways before even getting to 10-15 ft lbs. Edge of bolt is almost flush with edge of locknut.
 
You must log in or register to reply here.

Similar threads

G
Help Ford 3000 sos
Replies
12
Views
341
Georoland
G
R
Ford 981 SOS transmission
Replies
0
Views
181
Robert Kercher
R
B
Ford 800 value
Replies
15
Views
606
showcrop
showcrop
F
Ford 4000 sos questions
Replies
2
Views
359
Husker 50 8n
H
N
Tomorrow is the Day
4 5 6
Replies
101
Views
3K
showcrop
showcrop
Tractor Parts Tractor Manuals

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 © 1997-2024 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

Back
Top