How do you adjust gearbox linkage?

To adjust gearbox linkage, first ensure the vehicle is securely parked and the engine is off. Locate the linkage connection points, usually found at the transmission and the gear shifter. Loosen any adjustment screws or nuts, then shift through the gears to find the correct position, ensuring smooth engagement without resistance. Finally, tighten the screws or nuts while holding the linkage in the adjusted position, and test the shifter operation to confirm proper adjustment.