Mystery small spring and ball in bx transmission

idiotdiy

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bx2380
Mar 30, 2026
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0
1
minnesota
Well I screwed up and had to replace the PTO selection gear shaft in the transmission on my bx2380. What a job. Split the tractor and took apart the transmission. While I had it all apart, I was digging for the metal chunks and found a small spring and ball in the bottom. Best I could think of is that this is a pressure relief somewhere. However none of the diagrams show one in the pieces I disassembled to do this job. Any ideas where it might have come from?
 

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GeoHorn

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A lever-detent…?
 

idiotdiy

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bx2380
Mar 30, 2026
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minnesota
It looks like it might be a pressure relief thing. But I can't figure out where it would go. I don't think it is internal to the transmission.
 

whitetiger

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It looks like it might be a pressure relief thing. But I can't figure out where it would go. I don't think it is internal to the transmission.
They are one set of the detents in the trans-axle; there are several of them.
 

North Idaho Wolfman

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That is not a pressure relief spring or ball, they look different than that.

That is a detent spring and ball.


1775968114514.png

1775968209714.png
 
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whitetiger

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Remove the 4WD detent retaining bolt shown below, see if it has a spring and ball under it.
I suspect it doesn't.

The ball goes in first, then the spring.



Screenshot (101).png
 
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whitetiger

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Well I think this is the most likely. I will pull it all back apart to confirm. It did drop when I pulled the PTO selector shaft out to replace it.
You do not need to tear anything apart; they go in through the exterior bolt hole, which is circled in the picture.
 
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idiotdiy

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bx2380
Mar 30, 2026
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0
1
minnesota
You do not need to tear anything apart; they go in through the exterior bolt hole, which is circled in the picture.
You are right, and an amazing person! There was no spring and ball in that 4wd hole.

I was thinking it was from the PTO gear shift arm, which doesn't have a bolt hole access. But I hope that one is still in place.

Thank you.