Hard to tell without actually pulling apart so bear with me if i am wrong. Sounds like the Selector shaft is the problem since it wont go into any gear. if it were just 2 gears with a problem say 1-2 or 3-4 i would lean towards shifter forks. At any rate i think what you were looking for is inside the trans and requires being pulled apart.

If the pin snapped on the selector shaft you would probably get full range of motion on the shifter,then again there is no way to tell where the "debris" went to. if a stop ring shattered i would expect only the loss of 2 gears 1-2 or 3-4 or 5-r.

Dino your thoughts?

Terry

96 Eagle Talon ESI....Daily driver

97 Eclipse.........