Case 580 ck emergency, advise needed please, stuck

Well, I am now feeling very defeated with this machine. Any help would be awesome. I have owned this thing for 5 years and it paid for itself 10 times over. I am mechanically inclined, but have ventured into uncharted territories. I have never had that many issues with this machine but when it rains it pours. I have successfully pulled the clutches and rebuilt them. Then I spun a bearing two days later. I pulled the engine pulled it apart and did the big one. Sleeves, pistons, new rod and all engine bearings and seals. After minor troubleshooting hit her to firs back up after I wrestled the engine back in. Patted myself on the back and put it to work. Pulled and dug 20 fence posts, and cleaned and treated my pasture. Machine runs like new and has 190 ish psi on the shuttle clutch pressure. I go out today and pull up an enormous stump, and awesome, it comes out in ten minutes. Everything feels amazing. After all the clutch problems and engine troubles, it's amazing it even runs well like this, I am happy. And then, just stops. I'm in first gear moving machine, shift to second, driving along and wan just stops abruptly. I was in the street moving to back of property and cars were starting to get pissy. I put it in neutral and used the hoe to push me to the side of the road. I now have no clue what to do. Machine runs fine, has proper clutch pressure but does not move. What I did:
1. Pulled clutch cover off and inspected clutches. I can see forward and reverse engage and disengage when I move shuttle lever. I also have proper clutch pressure.
2. Lifted myself off ground stuck it in forward and reverse no rotation while in gear.
3. Take it out of gear and can spin tires, but they spin in opposite directions.(diff)
3. Put it in gear and tried to push myself with bucket, I just drag both tires forward and reverse.

It seems like something is stuck in the tranny or diff. Everything I did to the machine works great. From tranny to the front everything has been gone through, cleaned and painted. I never have taken apart the tranny/diff just changed fluid. The fluid is new and correct on dipstick.

I know someone out here can point me in the right direction. Please advise. I will be eternally grateful.
Specs to help out
580ck
Shuttle shift

Why everything works except movement sounds like a broken planetary gear or pinion gear of some sort. It looks fairly accessible from the top side. I'm going to pull seat and top cover and look in there, what should I see?

just a thought is your tractor a dual or triple range if so could the range shifter got bumbed to netural? Also does your tractor have a hand clutch that got desingaged that happens with my 430. Dave F.

Sounds like you got 2 gears engaged at once. Open main trans and check. Seems like I have read that broken/bad worn shift fork can happen on those machines allowing that to occur.

Stuck in two gears should kill the engine, he didn't mention that. May have twisted off a shaft.

These machines had a petty weak Ring and Pinion. Have replaced at least a dozen in my
career. Pull the plate off the rear of the differential and you will probably see some
missing teeth on the ring gear.

What does stuck in two gears mean? My little shifter Kill switch thing
on the floor next to the shifter has never been connected since I've
owned the machine. If it is engaging two gears my engine would not
kill like it should. If it is stuck in two gears, how do you get it out of
this situation. It might be this because I was in low, then shifted to
second gear and then wham, like I hit a wall. Funny thing is, I can go
through the gear box with the shifter. Please advise.
P.s
Thank you, I am new to this type of machinery, don't work in this
industry, don't make money with the machine. I use it on my farm
because I have a bad bad back and I was being forced to do to much
manual labor cleaning and shoveling after the animals. I'm pretty
much on my owne little island and I don't even know anyone who has
or works on one of these things. That's why this forum is so amazing.
I can get advise from people who have gone through the same issues
and have experience solving them. Thank you all. I would have
given up a long time ago if it wasn't for people on this list that take
there time to read this forum and respond.

Being stuck in two gears has nothing to do with the safety start switch, it will not "kill" the engine all it does is not allow you to start it in gear, being stuck in two gears means it can be in say 1st and 3rd gear at the same time for example,

With old equipment, there is wear. The end of the shift lever will deteriorate to the point that when you attempt to shift out of one gear,(first) the lever will slip out of the shift rail, without moving the rail into the nuetral position. Now when you move the shift lever to second. the tranny is in two gears. When the shifte lever is returned to neutral, you are still in first gear. Replace the shift rail to neutral and repair or replace the shift lever to prevent the problem from reoccurring. Hopefully this is what you have for a problem, because it is a simple fix.

(quoted from post at 06:00:47 05/14/17) These machines had a petty weak Ring and Pinion. Have replaced at least a dozen in my
career. Pull the plate off the rear of the differential and you will probably see some
missing teeth on the ring gear.

Click to expand...

I bought mine 20 some years ago and the fellow that owed it was giving me the low down on the different things he had done while he had it. I believe he said the ring gear had rivets that sheared and he replaced them with bolts, was a factory weak link, I don’t know about that.
Hope this is not your problem , mine is a 1977.

I'm going with the broken ring and pinion gear because:

If it were stuck in 2 gears, it would kill the engine when the clutch is engaged, and the shifter would not move through all the gears.

Others have said that is a weak area. That also coincides with having a now healthy motor, which makes more power, finished off an already failing part.

If it dies when you try to engage the clutch then it may be stuck in two gears. If it did not shift out of first when you put it into second it should have slid to a stop. It seems you said you successfully shifted to second and had the clutch re-engaged before the issue.

It will also not roll if stuck in two gears, which you said it would not do. If you broke some teeth on the pinion they may have become lodged under the ring gear, also preventing the tractor from rolling.

Shifting a tractor while moving can break gears if you don't know how to do it safely. Tractors like yours are designed to start in any gear, not 1st, then upshift although it is commonly done.

Be sure to post what you find.

I get it. The safety switch just allows you to not start while machine is in gear. Someone down the line disabled that. If I am stuck in two gears how do I get it out. I can shift through the gears, but maybe that is just the selector. I am going to pop the top and take a look. Your advise would be awesome, because I am pretty clueless about this part of the machine.
Adrian

I get it. The safety switch just allows you to not start while machine is in gear. Someone down the line disabled that. If I am stuck in two gears how do I get it out. I can shift through the gears, but maybe that is just the selector. I am going to pop the top and take a look. Your advise would be awesome, because I am pretty clueless about this part of the machine.
Adrian

If you have the tractor shuttle in forward and the transmission in neutral the engine should idle with the clutch engaged. If it does you aren't stuck in two gears. Two gears will still kill the engine in neutral because the gears aren't moving back to neutral.

I would take Welding man's advice to pull the differential rear plate and have a look.

I agree with the ring gear and pinion. I worked for the Case dealer back in the 70's. That was a common problem with those machines back then.