Ford 4000 Broken trans fork

Hi there, I am new to this forum and fairly new to in depthrepairs to my Ford 4000 3cylinder gas tractor with the 8 speed trans.

I recently lost reverse in high and low and it seemingly happened out of nowhere. I had taken the transmission top cover off and made sure all gears are in good condition, plungers and springs and detent balls were okay, but I could not get her to reverse at all. After putting it back together and trying all the speeds, I noticed 4th would not engage and it would pop out when the clutch engaged. Upon further inspection and draining of all hydraulic fluid, I noticed that the selector arm, part 5 in the manual, detached from the 4th and 8th gear shift fork. The fork seems to be resting in the bottomof the pan. I?m guessing this would block the reverse fork from meshing fully with the reverse gear.

My question is, am I out of luck and I?m need of a full split? Or can the fork be replaced or repaired without splitting the bell housing. I would rather not have to go through with that procedure.I have never done a split, but I will do what I need to keep this machine running well.

Another note, is the fork threaded onto the selector arm? Or will they need welding back together?


Thanks for any and all help.

Tristan

Here?s a picture with the fork in question

First two things you need are a front split and a service manual.

Rick,

So the split will be necessary? I have the shop manual. It refers to doing a split for any fork work. I just wanted to make sure

At minimum you'll have to do a rear split the get the necessary shift rails out in order to reassemble the forks.
Make sure to get any broken parts out of the case so that they're not sucked up into the gears.
I had a front lower pto bearing fail, one of the bearing balls went thru 2nd gear breaking teeth off of 2nd gear and the lower cluster.
It was a pricy repair.

Destroked,

As I mentioned before, I have no experience in splitting, but
from what I gather a rear split might be easier than a front. So
the rails can be pulled through the back of the trans case?

Yes the rails come out the back, you'll have to remove items 7 & 8 to get 4th/8th shift rail out.

That?s definitely useful knowledge, thank you