The linkage is shifting the transmission but it's not trying to go into gear.
Bought the car not running and found shorted and bare wires on the loom by the battery. Loom rubbed on the chassis ground bolt and caused electrical issues. Fixed the wiring and replaced fuses. The car runs fine now but will not move. Probably gonna change the fluid and filter. Acts like the transmission is not pumping fluid.
Update: I unhooked a trans cooler hose and briefly started the engine. No fluid pumped out. Seems I have the internal radiator leak also. There is oil in the coolant and coolant in trans. Didn't notice it earlier due to not running the engine. Headed to a local radiator shop to get it tested and to get coolant, fluid and filter for the trans. I should know after this if trans in shot already. Hopefully the filter was not completely plugged and no damage was done. I only ran the engine for short periods while trouble shooting.
Update #2: Radiator checked good. Previous owner replaced with an after market unit but obviously did not flush/change the trans fluid and coolant. Changed fluids and trans filter and it is working fine now. Drove it a few miles and shifted as it should. I'll see how long it lasts.