I would not rebuild and just find the lowest mileage used one available to you.

Is this your first flush at 180K miles? If so, you might of done more harm than good cause the metal shavings actually kept it running properly. Your car’s symptoms tells me that you should expect to replace that trans soon.

Fuck around and find out.

You can order them online and shipped to your house too. Tirerack is very reputable and has a good selection. If you get rims with the tires, they come balanced as well. Go to any mechanic or tire shop to install and it shouldn’t cost you more than 30-40$

If you want to know my top winter tire brands: Michelin X-ice and Bridgestone Blizzaks. Do a bit of research on your own, but these are my top personal picks. Not an economical choice by any means, but I don’t cheap out on things that seperate me from the ground. Nothing beats the feeling of safety having the best tires.