My transmission is being worked on at a shop currently and I’ve been told it needs a “shifter shaft” bearing. I don’t even know what that part is but it looks like a little sleeve. Mechanic gave me a part number to look for DD-601-353. He’s looked around for something and can’t find anything. I have put this number into google and can’t find anything. I have tried googling shifter shaft bearing and still nothing. Does anyone know what this is or where to find it? I’ve been researching for hours and this little part is preventing my transmission from being reassembled.

Here’s a pic of it.

 

my gut says you will need to go to GM or to a specialty transmission parts supplier.