00 4.6L V8 new clutch won’t go into gear when on?

So I recently bought a 2000 ford Mustang 4.6L v8 GT. Has the trehmec transmission and instantly my gears started to fail so I had to replace the transmission myself.

The car has been siting for years prior to me snagging it on a steal.

I was able to put the new clutch in and she fired up really quick. My clutch peddle was super stiff so k replaced the clutch cable and thats. Not a problem anymore. Yet I can’t put my car into gear when it’s running.

I can shift gears when the car is off yet the clutch grinds like crazy when I
 
First and foremost welcome to Stangnet!

Just a suggestion but you should edit your post and correct the spelling and grammar. It reads like really bad second grade English. It’s to the point that’s it’s hard to follow. We appreciate clear and concise writing so we can focus on helping with the problem.