Was it this one? 2025R Loose boltLooks like the same bolt I recently found loose on my new 2025R.
Under the engine on the 2025R there is a shield? for the front of the oil pan. The shield has two bolts on the front. They are located just in front of the FEL mast. The one on the left of my tractor was loose. It has a nut on the inside of the frame.
I don't know if the 2038 has that shield but maybe look there. I have a post with pictures (sorry, I don't know how to do links on this forum)