641 sherman transmission

[fran213]

I have a 641 with a step up step down sherman transmission . I had the sherman apart for a leaking input shaft seal and replaced bearings and races while I was in there . The sherman shifts fine on the work bench . It only has high gear ( step up ) when in the tractor . I did shim it when I reinstalled it . Any ideas ?

 

[michford]

Did your sherman shift correctly before removal? Did you put pressure on the output shaft by standing the trans up on the end of the output shaft when bench testing the shifting? Link below for rebuilding the sherman combo if you haven't seen it.
rebuilding sherman combo from Ford Fordson website

 

[fran213]

Did your sherman shift correctly before removal? Did you put pressure on the output shaft by standing the trans up on the end of the output shaft when bench testing the shifting? Link below for rebuilding the sherman combo if you haven't seen it.
rebuilding sherman combo from Ford Fordson website

I believe that i did stand the trans on end when test shifting it .

 

[michford]

What do you mean by only has high gear? Will it not physically shift into low or neutral for the standard tractor gears? Or if it shifts into low or neutral will it not stay engaged in those gears?

 

[fran213]

The Sherman transmission will shift into high range and neutral. It will not shift into low range or standard range .

 

[michford]

Do you have the rubber grommet installed around the sherman shift handle? Is the grommet interfering with the shifter movement? Have you tried shifting without the grommet installed?

 

[Tim PloughNman Daley]

I have a 641 with a step up step down sherman transmission . I had the sherman apart for a leaking input shaft seal and replaced bearings and races while I was in there . The sherman shifts fine on the work bench . It only has high gear ( step up ) when in the tractor . I did shim it when I reinstalled it . Any ideas ?

The I&T F0-4 Service Manual has a chapter on the SHERMAN.

Tim Daley (MI)

 

[fran213]

Do you have the rubber grommet installed around the sherman shift handle? Is the grommet interfering with the shifter movement? Have you tried shifting without the grommet installed?

It does have the grommet installed . I will remove it and try to shift the trans

 

[michford]

It does have the grommet installed . I will remove it and try to shift the trans

@fran213, did you get your Sherman to shift into anything other than high range? Are you sure you're not just getting neutral/conventional and not able to push shift lever in far enough to get to low/high range?