Transmission stuck in 2nd gear.

[pehayes]

It looks like the bearing at the rear of the tranny where the rod for the clutch goes may have failed and come apart?

I stand to be corrected, but I'm not certain that a failed throwout bearing can push pieces inside the gearbox case.  I think they remain captive inside the bore of the rear cover.  Someone school me.

Inspect the rear cover carefully.  If the throwout bearing did disintegrate, its spinning steel pieces can do serious damage to the internal surface of the 22mm bore of the aluminum rear cover.  If the bore is damaged it will repeatedly tear up any o-ring that  you use to seal the outer body.  If damaged badly, the rear cover can be replaced or yours can be sleeved to restore the original bore dimension and smoothness.

Meanwhile, there is another radial thrust bearing on one of the shafts.  Perhaps the roller bits came from that one.  Do a careful inspection.

BTW, failure of either of these bearings shouldn't prevent shifting unless something (some part?) got jammed out of place.  I'll be curious to see why the shifting doesn't work.  I never  heard back about the possible binding of the shift linkage as it passes through the frame rail.    Also, the Guzzi is known to resist any shifting unless the internals are spinning.  Good to have someone turn the rear wheel by hand while you try shifting the system.  Once  you reassemble the box, it still won't shift on the bench unless you turn input or output shafts.

Patrick Hayes
Fremont CA

[n3303j]

I'm the fan of doing it the easy way.
Undo the input shaft nut.
Remove the selector detent ball and spring.
Undo all the back cover screws.
Prop the transmission, cover down on parallels.
Lift the main case off (note any shims)
The result looks like this image
Do repairs as necessary.
Stack the repaired parts on the back cover.
Drop the case over the assembled works.
Reinstall cover screws.
Reinstall input shaft nut (torque properly).
Done.

[nc43bsa]

Your problem of the transmission stuck in 2nd gear reminded me of this song from back in the fifties, Dusty would surely remember it...

https://www.youtube.com/watch?v=2skGMkxB6Ng

Without even clicking on the link I knew it was the song about the little Nash Rambler.   

[nc43bsa]

I have only had one 5-speed apart, and that one had a destroyed throwout bearing because the shaft bearing came apart.

[baxterday]

I stand to be corrected, but I'm not certain that a failed throwout bearing can push pieces inside the gearbox case.  I think they remain captive inside the bore of the rear cover.  Someone school me.

Inspect the rear cover carefully.  If the throwout bearing did disintegrate, its spinning steel pieces can do serious damage to the internal surface of the 22mm bore of the aluminum rear cover.  If the bore is damaged it will repeatedly tear up any o-ring that  you use to seal the outer body.  If damaged badly, the rear cover can be replaced or yours can be sleeved to restore the original bore dimension and smoothness.

Meanwhile, there is another radial thrust bearing on one of the shafts.  Perhaps the roller bits came from that one.  Do a careful inspection.

BTW, failure of either of these bearings shouldn't prevent shifting unless something (some part?) got jammed out of place.  I'll be curious to see why the shifting doesn't work.  I never  heard back about the possible binding of the shift linkage as it passes through the frame rail.    Also, the Guzzi is known to resist any shifting unless the internals are spinning.  Good to have someone turn the rear wheel by hand while you try shifting the system.  Once  you reassemble the box, it still won't shift on the bench unless you turn input or output shafts.

Patrick Hayes
Fremont CA

The shift linkage was fine, it went up and down without any binding and returned to where is should.  It just didn't move it out of what I think was second, could have been third.

[Tom H]

As mentioned already. Pics of where your at so far would be great. Especially the throw out bearing.

Tom