Behind the GM 700R4 automatic, a 3.8:1 Atlas transfer case from Advance Adapters is used. We've always tried to rotate these till we can get a flat crossmember. This is the first time we've seen one clocked this way! Alan tells us that this is the only way the Atlas will fit. It really doesn't hang down much, although you can see a few scratches on it. Dana 300s are also available.