Visit SSOL. Log in.
Under the "Transcripts"/"Transcript Ordering" section, there will be a button that says "Order Transcript" at the bottom of the page. Click it.
This will redirect you to a new website. You may have to log in with your uni. After logging in, select eTranscript.
Follow through with the following prompts like a typical online purchase. Assuming you don't choose any extra features (like tracking) this won't cost you a dime, although you will be asked to provide payment information for some reason.
After completing your order, you should recieve two emails in your inbox, which could take anywhere between 3 minutes to half a day. Usually like 5-10 minutes though. The latter should contain your transcript.
In your transcript, there lists every class you have taken each semester thus far. In the right most collumn, you should see the A-Range for each class you have taken. Students in SEAS and Barnard do not have access to this information.