Kitcchen Aid mixer making a grinding noise

The mixer's planetary is not disconnected when the meat grinder is attached and continues to turn.

If the noise you hear only occurs when the grinder is in place, then the grinder may be assumed to be the cause. Consult the meat grinder's instructions and make sure that nothing is loose or overtightened.

You have possibly blown the fuse gear. Need a bit more info on the noise. If you turn it on slow and help the planetary does it try go get itself going?

If it is leaking you are going to have to go inside the gearbox to change the grease so whatever is wrong inside may become obvious when you take it apart. Remove accessory cap from the front and look for any dryish grindings inside there.

Sorry but we really need more info. what happened last time you used the mixer? have you pwerformed any work on the machine? have you checked the wall outlet you plug the machine into ( Iknow but check anyway)

There are lots of places to be looking, first thing I would look at would be under the rear cover to make sure the two nuts that hold the rear motor bearing housing in place are nipped up. You don't wring the neck on these nuts, if you over tighten them you will deform the rear bearing housing.
If you can find someone local who has been doing these mixers for a while they will be able to give it a once over. It's unlikely to be expensive. Best people to ask is Kitchen Aid, they should know who does their warranty work in your area. If you are in new Zealand it will be me.

check the brushs from sitting around they may be stuck in the journals.

It very likely sounds like a plastic gear that is worn. If this is the case, then a replacement is very likely stocked by the manufacturer only.

I advise opening the unit to identify which one you need, then 'phone the manufacturer with the make model and year of the product.

If they say they do not stock it - then I'm afraid that's as far as you can go with this.

Your mixer is easily able to handle the kneading of bread dough. Please advise:

9 cups of all purpose white flour, maximum.

6 cups of specialty flour, maximum. This is any flour besides all purpose white.

Bread doughs are only to be needed on speed 2, and never for longer than 7 minutes.

This is all stated in the Use and Care guide for the mixer itself. If these guidelines are not followed, it may lead to a product failure.

Hi Manfredi. Follow this link to download your mixer's manual.

http://shared.whirlpoolcorp.com/assets/pdfs/literature/Instructions%20and%20Recipes%20-%209704323.pdf

If this solution has assisted you, please rate it. Good luck, and don't overload the mixer when you're making bread dough. ricardok45

If it's metallic sound you are loosing teeth on a gear or two.  This is caused by lack of lubricant or simply fatigue of the material of the gears.  Don't use it, you can get metal flakes in your food.

Take it in to a repair shop and have it fixed.  The money spent is well worth it because if done correctly will last another 12 years.