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I think your transmission took a dive. The reason for the noise is with clutch pedal down, the input shaft to the transmission is not turning. When you let out the clutch, the input shaft mates with the flywheel and starts turning. A bearing or shaft or gears, something like that must have broken in the transmission.
A rebuild would be very expensive. A cheaper route would be a used transaxle.
This is just a general answer but there could be several possibilities that come to mind, firstly the clutch could be worn and near the end of it's life or it could be an adjustment issue. If it's a hydraulic operated clutch which involves a Master and Slave cylinder this can be bled to get the air out of it, typically there would be a bleeder screw where the Slave attaches to the transmission. Could be a bent fork (this operates the throw-out bearing) which releases the clutch disk pressure and allows the clutch to spin with no friction.
Check your brake fluid level as this is usually the same hydraulic reservoir for the clutch slave and master cylinder. have someone push the clutch in and out while you watch the movement of the clutch fork to see that it's travelling in and out or back and forth to release the pressure from the clutch.
There is typically an inspection plate at the bottom of the transmission that can be removed for a bit more viewing of the components.
The throw-out bearing could be stuck or going bad, typically this would be like a grinding noise or whirring noise when in Neutral and or when applying the clutch, if this throw out bearing is going bad and they will if they sit for a while but usually will loosen up some or free itself a bit from usage - this is, if it's been sitting for a while and hasnt' been used in a while.
Finally there are brass syncro-mesh gears inside the transmission and if you miss the gears too many times the ends of these gears get worn and you wont get it into gear easily.
Check the fluids on your transmission firstly, there will be a plug on the side, half-way up that you remove and stick a finger in and the fluid level should be level with the check plug that you removed. If you put your finger in and feel no fluid then it is low and be sure to use the correct fluids - see your manual.
Prior to this perhaps there is an adjustment on the shifter linkage that has moved and doesn't allow the full travel of the shifter linkage. This is usually along side of the transmission where the linkage attaches to the transmission - look for a rod with a set-screw on it, sometimes the set-screw loosens or it slides and gives less travel and an easy fix. This is typical of the older Chev trucks but not certain about your specific model.
Hope this helps a bit to try and eliminate some things to get closer to resolving your vehicles issues.
so the problem is that you cannot get it into gear from a stop (grinds trying to force into gear) . if you have a clutch pedal, what I mean is that clutch pedal has pressure behind it,moves up and down by itself, then its a clutch assy needs replaced.clutch disc/pressure plate/release bearing. if there is no pedal,falls to floor, its either clutch slave or clutch master failure issue(lost all fluid). but nothing points at needing a transmission,it should be fine
Either the clutch has failed, or something inside the transmission has broken. Can you shift gears with the engine running and not depressing the clutch ? Can you put the transmission in first gear and move the car by hand ?
do you mean that on the attempt to move first gear? if is that probably you will have a clutch problem.Either is you clutch disc broken springs,your pressure plate doesn't release the disc properly,or your hydraulic clutch system -if it is hydraulic- doesn't work properly.
This is caused by a defective clutch pressure release bearing, the release bearing is the only part that can cause this symptom. To replace the clutch release bearing requires the transmission be removed from the car, the release bearing rides on the input shaft collar of the transmission input shaft which goes into the clutch disk. If you replace the release bearing you should have the clutch disk and pressure plate replaced at the same time as the labor cost is about the same just to do the bearing.
If it's a manual transmission then the problem will surely be on the clutch lining. If the clutch lining is worn out the gears tends not to move. If this is the case I strongly suggest that you replace the clutch lining, pressure plate and release bearing to resolve the problem.
If it's an automatic transmission I strongly suggest that you replace the torque converter and automatic transmission fluid to resolve the problem.
Hope this helps and thank you for using FixYa! Have a good one!