Cruising about 35mph, heard a clunk. Gradually gearbox started to stiffen up. Left it for two weeks, it will feel normal cycling through 1-2 at first, then again gears will stiffen up, neutral is very stiff, when in 1st it clunks randomly when the clutch is in*. Replaced my fluid, I haven't adjusted the clutch pedal, but I'm pretty certain that isn't the issue . Want to know if there is anything else I can look for, before I drop the trans