" . . . looks like metal T handle at top with a black button that doesn't push on driver side thumb . . .
. . . It's still all connected to torque tube and stock rear . . . "


If the shift rod goes into the top of the transmission and the transmission is connected to the original torque-tube, it is most likely an SM420 4-apeed with an exotic shift handle.

4-speed with upon-rear u-joint yoke