OK. If you are sitting on a hill more than 15 degrees, if you do it will make that grinding sound. in most car booklets say on a Hill 15 degrees or more put it in neutral than apply the emergency break. and you do not need to be at any speed when putting it into park.
if it is in fact the starter, it is probably engaging the flywheel. starter may be faulty.
What would cause a grinding noise after a tire is replaced and the brakes are not worn?
A grinding noise in 1st, 2nd, and 3rd gear could indicate several issues, such as worn or damaged synchronizers that help engage the gears smoothly, or problems with the transmission fluid, which can lead to inadequate lubrication. It may also suggest misalignment or wear in the gearbox components, such as the gears themselves or bearings. Additionally, issues with the clutch not fully disengaging can cause grinding when shifting into these gears. It's essential to have the transmission evaluated by a professional mechanic to diagnose and address the issue properly.
A bad transmission. The sound is from metal grinding on eachother.
bad rotors
You probably have something wrong with your engine, or brakes. You should really have that checked.
your clutch may not be fully engaging
wheel bearing
Lol everything! When you run an engine without sufficient engine, all the moving parts get hot and wear increases. And this may cause distortion from the extreme heating and cooling of the moving parts. Distortion means they are not the right shape and so it grinds as it tries to do what it used to.
I have been told it may be the Alternator eeding a refurb
your barrins in the wheels
Engines work best in a limited range of resistance and rate of rotation. Gears makes it possible to have the engine running in that range (almost) regardless of what speed the vehicle is moving at.W/o gears the engine would first struggle to get the car moving(where the resistance is too high), and once moving, the engine would struggle to get the car to speed, as the engine soon wouldn't be able to spin any faster.