RTR, no need to pull the cover to check the detent balls - if the shifter 'snaps' and holds into each position, the springs and balls are ok.
I may be wrong here, but I believe the 140 tranny is no different than the SA, and I fixed my SA last year from doing much the same thing.
The bottom of the shifter rod should be a "rectangle" shape blade, about 5/16" thick, and about 5/8" front to back, with a slight rounding to allow for the arc of the throw (front to back) within the shift fork.
side view (spacedots.) front view
..|......|. . . . . . . . . . . . \. . ./
. \___/ <-- rod -------> \. ./
. .(__) <-- shift blade -> |_|
I think someone here posted photos of the repair they did. A search may find it.
Mine was worn more like a wedge because the pivot pins were shot. It would slip between the forks leaving it in 2nd or Rev, and put it into 3rd or 1st (respectively) as well. I pulled the shift rod from the cover, checked springs and balls, added weld (6011) to the sides of the shift blade, then ground it back to proper shape; replaced the pivot pins (IIRC, about $20 from CNH), and it's back to near original.
It sounds like yours may have a bad detent spring, or when put together, one of the shift forks isn't in the slot in it's sliding gear. I had to try 3 times to get the forks in the gears because it doesn't take but a nudge to get them to move down hill (my dirt floor equipment shed isn't level). It would probably help to have it parked on dead level ground for such work.
Let us know what you figure out.
This post was edited by WellWorn at 06:59:10 05/16/14 2 times.
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