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8n jumping out of gear

A

Art L

New User
Hello, I have a 1950 8N that jumps out of 1st gear going down a steep hill. Reading some posts here and elsewhere, it seems a logical place to start out would be to check the set screws securing the detent balls to see if a set screw is loose. Can anyone inform me whether or not the set screws for 1st gear, or any gear for that fact, is accessable from the top cover without splitting the rear from the trans housing? Also, in the mean time, can I hold the shifter in place manually to get down a hill? It doesn't jump out of gear on a flat or slight hills when Im mowing a field. I appreciate any help.
 
Holding that gear shift might be a challenge under load. if not, should not be an issue. Those shift detent screws etc. should be
just under the top shifter cover.
Open it for a better idea of your problems.
 
Spring and ball for first and third shift rail (Key #19) detents (Key numbers 15 and 16) are held in place by top cover on transmission.

<img src = "http://cnh-b2b.ptcmanaged.com/index.php/sbsimage/NH/default/385180.png"?

While it's POSSIBLE a broken spring could be your problem, if it is you better go by some lottery tickets!

It's FAR more likely there's gear or shift collar wear, or worn/loose transmission bearings.

Plus, hijinks like jumping out of gear on a downhill slope potentially causing a "runaway" were more tolerated back in that era.

HOPE you an figure out what the problem is/make it better, but BE SAFE, having the transmission pop out of gear on a downhill slope is not a GOOD thing, especially on a tractor that never won a "best brakes in the industry" award!
 
My 49 used to do that but it stopped after I swapped engines in it. I can't explain why an engine change will affect it in any way. But back to the second part of your question, yes you can hold it in place with your hand and I still do because I got some pretty steep ground. seems it would always pop out just before the ground started to level again.
 
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