Lost my clutch pedal at 60mph clutching to shift from 3rd gear into 4th gear. Pedal went soft and then felt hard at the bottom and was bottoming out. Couldn’t shift into any other gears, but did manage to get it back into 3 rd gear with some effort. Limped home. With engine not running gear box will shift into all 6 gears and reverse, but not when the engine is running. Thought it may be a hydraulic issue and inspected the hydraulic fluid lines, from brake reservoir down to clutch master cylinder and line out down to transmission slave cylinder. Didn’t see any leaking fluid. Replace clutch master cylinder. Used a vacuum pump at the slave cylinder bleeder and pulled brake fluid thru. Pumped up pedal and cracked the bleeder and had good fluid flow. Topped off brake reservoir and repeated bleeding lines 10-12 time. Clutch pedal still feels a little bit off, and still not clutch operation, will not shift into any gears. Any ideas?