Nothing, G just stands for group size. There are 3 different models for the G31 YT, only difference is the type of terminal.Just out of curiosity, what's the difference between the G31 and the D31? I had the D31 in my trunk for a while, and I kinda regret getting rid of it. It was 1125 CA, 900 CCA 155 RC, and 75 AH. What are these rated at?
That's what I thought, but I wanted to make sure. I had the D31A which had the standard top posts. The 31T has the top stud, then the blue top has both, the D31M. It's exactly the same as the D31A and the D31T to every respect, except it's blue and it's got both studs and posts. Sorry to thread jack there, good luck with your sale. These are awesome batteries.Nothing, G just stands for group size. There are 3 different models for the G31 YT, only difference is the type of terminal.