Spray a high-quality penetrating oil (like PB Blaster or WD-40 Specialist) into the shifter mechanism and let it soak.
Before dismantling the unit, try these less invasive methods:
Verify the clutch hydraulics are working. If the clutch isn't fully disengaging, the gears will remain under tension and won't move. 3. Mechanical Intervention freetranny
Replace the old transmission fluid, as it likely contains moisture or debris that caused the sticking.
With the wheels on the ground, gently rock the car back and forth while applying light pressure to the gear stick to help pop it out of gear. Spray a high-quality penetrating oil (like PB Blaster
A transmission usually sticks because the shifter rods, detent balls, or synchro collars have oxidized or settled into a "locked" state.
Dirt or rust in the external shifting cables or rods. A transmission usually sticks because the shifter rods,
If the shifter remains frozen, more direct action is required: