I don't really follow what the arrows means on your position diagram... but that's OK. The number of positions appears to be correct.
What you call the "right lever" = select lever. Selects between the different shift forks. Corresponds to left-right movement of the cabin-mounted gearstick.
What you call the "left lever" = shift lever. Shifts the selected shift fork in or out of gear. Corresponds to front-back movement of the cabin-mounted gearstick.
I have drawn the movements of the ball studs on which the shift and select cable ends snap onto. The paths they take are in green, with distinct positions shown with green circles.
You seem to have figured out the select lever.
The shift lever moves in an arc.
| quote | Originally posted by snyderman: PIC 1 When right lever is in the up position facing the front, the left lever has 3 positions.
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The three possible positions of the shift lever in this instance:
3
N
4
| quote | Originally posted by snyderman: When right lever is in the middle(no resistance) the left lever still has 3 positions.
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The three possible positions of the shift lever in this instance:
1
N
2
| quote | Originally posted by snyderman: When right lever is pushed towards the back, the left lever has 2 positions.
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The two possible positions of the shift lever in this instance:
R
N
So far, from what you're describing, nothing looks broken.
Most of the left-right feel (the reverse wall, and the rightwards spring action towards 3-4) in the gearstick is created by springs in the shifter assembly in the cabin itself. These forces are not generated within the transmission, except for a rather weak reverse wall spring.
When I setup the select cable on a 4-speed Fiero, I use a bunjee cord to pull the gearstick against the reverse wall that originates from the shifter assembly in the cabin. Then, I shift the transmission into 1st or 2nd gear. Then, I tighten the nut on the select cable ball stud.
You may want to call a Zoom meeting for later this evening, this stuff is hard to explain.
Have you ever driven a working 4-speed Muncie Fiero? Do you know how it's supposed to work when everything is in proper working order?
[This message has been edited by pmbrunelle (edited 10-24-2020).]