I have a 1997 Toyota Tacoma 4wheel drive truck when I push the clutch in it feels like there is air in it and won’t let the gears engage. Could it be the hydrolics? I had this same problem beore and have recently had the transmission rebuilt and still have the same problem.
The clutch fluid will have a reservoir. Locate it and check the fluid level. It should be located next to and to the left of the brake master cylinder. It too uses brake fluid. You may have to bleed the clutch system if it’s full of air…Fix the leak, too…