Will not go into 1st or 2nd gear. Other 3 gears working but gear stick seems very loose when 4th
Is this a manual shift or Automatic? Also how is reverse functioning?I am going to assume it is a manual shift transmission. There are a couple of possibilities that come to mind. One, the shift lever bushing may be worn. Removal of the shift lever and inspection would be necessary to confirm this.
Shift Lever Removal
My 2nd thought would be the clutch master/slave cylinders are worn out and not functioning properly. A quick test would be to see if you can shift into these gears when the engine is OFF. If you can shift into these gears with the engine is off but not with it running, then you have confirmed the clutch master and or slave(release) cylinders are faulty.
Clutch Release Cylinder
Clutch Master Cylinder