There are many ways to find good transmission shops in Chicago. One of the best ways is to get the recommendations from your local drivers or friends. Once you get the service from the shop you can have your own experience about them. Don't choose the shop, choose mechanics because they are the ones who will rebuild and repair transmission for you. Get an estimate and make sure they are experienced and certified. These are the few tips for choosing a good transmission shop.
I would recommend to go with the SOS Transmission. It is a certified shop for repair and rebuild transmissions in Chicago. For more information and an estimate you can contact them at their website https://sos-trans.com/.