Steve's response means that my KitchenAid is working again - but how do you replace the speed lever? The black covering of mine has come off and I have the replacement but can't easily work out which screws to undo to get to the lever.
I have added a link below for our help video on replacing your speed lever and have also added a link to a speed lever if you wish to purchase:
https://www.youtube.com/watch?v=y97KT98vpJ0
https://secure.kaparts.co.uk/sku/9709276
I hope this helps you :-)
KAParts
March 2020
Phillip, here is a link to the service manual for the mixer, it will show you how to take the mixer apart, replace the speed control lever and put the mixer back together.