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SOS question

J

jeff pk

Member
I recently bought an 881 that has some issues with the SOS. It seems to run in more gears when it"s warmed up. When I first bought it and ran it cold, it only moved in gears 1-5 and one reverse. Then I warmed it up for a while and it ran in the others. So I"m wondering if this indicates a problem or if this is normal. What is the warm fluid doing that the cold isn"t?

I plan on changing the fluid and adjusting the bands per the manual, but don"t know if I can do much else. Is anyone making the filter?

Thanks for any help...
 
Not normal.It should be like your car. It is an autamatic. So many things in this tranny, oalong with oil pump, o-rings. Mine on 981 after warms up goes good. Get a bmanual for troubleshooting. My 871 SOS is great. Ready to get a manual tranny for the 971.
 

No that is not normal. All ratios should operate properly from the get go. This is not an automatic as has been suggested, but rather is a powershift.

We need to know several things to help you more adequately.

1. Is this the original transmission or has it been updated? The original would have a 312259 casting number on the side by your left heel. An update would have a C*NN-7006-B there. The * will be either a 3 or a 0.

2. We need to know precisely which ratios operate and which ones don't.

3. We need to know what happens in the inoperative ones, i.e. does it simply go to neutral or does it lock up and kill the engine.

My guess from afar: You have the original transmission and the ORC (over running clutch) is headed south. This would make R2, 3, 4, 7, 8 & 10 go to neutral. R1, 1, 2, 5, 6 & 9 would operate normally.
 
It's the original casting number. I'm going to take it out
tomorrow and run it thru the gears and see if I can't get you
more exact info. 10th gear worked well last time I had it
going, and I was told by the PO that it didn't work---which is
why I was thinking it worked when I warmed it up...

Are red bands painted diagonally across some of the gear
indicators on the shifter or was that done by the PO to x-out
those gears?

Thanks
 
(quoted from post at 20:34:30 02/26/13) It's the original casting number. I'm going to take it out
tomorrow and run it thru the gears and see if I can't get you
more exact info. 10th gear worked well last time I had it
going, and I was told by the PO that it didn't work---which is
why I was thinking it worked when I warmed it up...

Are red bands painted diagonally across some of the gear
indicators on the shifter or was that done by the PO to x-out
those gears?

Thanks
Click to expand...

The red hash marks indicate that the tractor was built with the early SOS. The speeds with hash marks have no engine braking. Free wheeling. Filters should be available soon. Tony Jacobs is working with Dennis Carpenter to get them made.
 
Larry NCKS wrote:

"My guess from afar: You have the original transmission and the
ORC (over running clutch) is headed south. This would make R2, 3,
4, 7, 8 & 10 go to neutral. R1, 1, 2, 5, 6 & 9 would operate
normally."

Swap groups, Larry.

Bad over-running clutch causes R1,1,2,5,6 and 9 to slip. R2,3,4,7,8
and 10 will function normally.
 
Is Dennis going to have them made in the US or have them made in China like he's been doing alot of his other parts? New filters would be nice to get though, to bad us SOS users can't get them from that warehouse that there all stocked up in when the dealers send back there "older" Ford parts to New Holland. We lent Dennis some NOS grass screens that he now sells for the grills of the 700/900 Fords & hate that we did now. Carpenters has not been such a good place anymore like it used to be, I can go 2 more exits down & get restoration parts for Fords from another place with the Dennis Carpenter name on the box cheaper than from his place! Even his museum is only opened 2 days out of the week now, maybe Tony will get better appreciation from the Carpenters than others do?
 
Zack,

I have an old filter at home I have been wanting to get into and see if they can be "renewed" reasonably. I will see if I can get to that this week and post some pics of what I find.

Chris
 
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