Hi,
It sounds like one of the shift cables came disconnected or has broken. Do me a favor. Have a helper shift through the gears while you watch at the transmission to see if the cables are moving the shift levers. Note: There is a mount that holds the cables in place at the transmission and clips at the shifter itself.
See pics 1 and 2 to help identify parts.
Let me know what you find or if you have other questions.
Take care,
Joe
See pics below.
Images (Click to enlarge)
Dec 30, 2021 at 6:14 PM