I have a 1989 B2200 Mazda. The clutch would stick in now and again. But now if you push it in it stays in and you cant put it in gear:(. What’s wrong? It’s a work truck.

Is it a hydraulic clutch or mechanical. If hydraulic, the slave cylinder is pooched. Mechanical clutches the throw out forks are seized up. IMSMC these have hydraulic clutches.On the big trucks we have the shaft that runs across the bell housing and it has 2 grease fittings so they don't seize up on the shaft.