Backhoe trans problem

jnw803 · Jan 21, 2015

I have a ford/nh 2120 12 speed f n r on left 1-2-3-4 on right..tractor will be pulling fine then all the sudden its like it kicks into neutral riv it up shift into different gear, go from high to med or low range nothing helps. After a little time it just starts pulling again. Dont matter if u move gears or anything or if u just sit and dont touch anything it will adventualy start pulling again....Any ideas...

mddorange · Jan 22, 2015

:welcome:
To the forum. Is that a 4x2 or 4x4 MFWD?

jnw803 · Jan 22, 2015

mddorange said:
:welcome:
To the forum. Is that a 4x2 or 4x4 MFWD?

It is a 4x4

MinnesotaEric · Jan 22, 2015

I'm willing to bet your shift linkage bushings are worn out.

oldcowboy · Jan 22, 2015

shuttle?

jnw803 · Jan 26, 2015

Tractor is 1984 model, shuttle shift..
linkage bushings are good.. black box under steering wheel appears to b good. single wire going in top of it has 13 volts and both wires coming out of bottom of it has 13 volts.

jimmysisson · Jan 27, 2015

How many hours on it? Does the range lever feel like it's fully engaging the gears (mine doesn't always)? This is a gear shuttle, not hydraulic, right? I assume also the clutch is not disintegrating.
Jim

jnw803 · Jan 29, 2015

It is gear shuttle, when it takes these spells I have tried switching from high to med to low range nothing happens. Clutch feels and sounds fine when it starts working again it will pull and everything clutch dont slip at all

jimmysisson · Jan 29, 2015

Well what is there that's not a hardened steel gear between engine and drive - the clutch, right? Some splines here and there?
Do you know the correct hours? Could this clutch have been abused some time in its history?
Maybe Rick B will weigh in - he da man.
Jim