Mine was built in mid-November and had 3.21 standard, so the 3.92s cost extra to get. But that's what I wanted.For 2020
From December to late feb 3.92 is all that they were allowing with eco diesel. Around early March they changed it and now 3.21 is the standard... go to ramtrucks.com and build for yourself.
trust me I spent quite a bit of time wondering what to order after they opened it up to 3.21 and 3.55