2000 Focus grinding into 3rd

sounds like the new clutch has failed bud

Then the clutch is not releasing properly & the continual
grinding will wear the gear teeth & you may also have worn
syncros, that will require you to pull the trans & go thru it, as well
as do a clutch replacement

I believe it's your clutch. If you can shift gears okay with the engine off, but you cannot shift gears with the engine running, (the gear shifter only grinds when trying to shift into first?) then your clutch has worn out.
To replace a clutch, the transaxle has to be first removed from the car. I'm afraid you will have to have it towed to a shop or garage.

you might have a bad sinconizer in the trans

Hi there, if you say hard to change, does the gears grind if you change or does the shifter just feel stiff on changing???if the gears grind the clutch need checking, check the fluid level as well as it could be low, could only need to be adjusted if a cable model, most are hydraulic clutches so need to check the fluid.

It may be a faulty syncro.

clutch slipping change the clutch

Either your clutch is getting bad, or you're shifting down too soon, and up too late. Try double clutching. Push in your clutch and push it into neutral. Release the clutch, fan the gas pedal, push the clutch again and shift into 1st. All this does is sychronize the speed of the transmission with the speed of the engine. There were, in the 60's, a lot of cars with the old "three on the tree" that you had to do this every time, and you get pretty good at it after a while.

you could retry bleed clutch slave cylinder,should really replace these when replacing clutch if high mileage or it might be fifth gear ring gear broken or worn looking at gearbox strip or new gearbox i would try rebleeding clutch might have small airlock in it.

strip and repair job is only soloution the selector is worn or the gear its self is cream crackered