Welcome to the forum! :Welcome1: The 3720 is one of my favorite machines! I would think you have enough hydraulic flow (speed) with it to handle a log splitter; as for the bucket mounted post hole digger, I'd like to know more about the attachment.
Congrats on your (new to you) JD 3720. :Welcome1: we are glad to have you. There are many friendly and knowledgeable folks here at MTF, so enjoy all the different forums. Click on ”Active Topics” near the top left of the page for all the latest activity. You can also register with other members from your state by clicking here: