[eksjay]

After getting my car back from service at a local workshop, I noticed a transmission oil leak. I put it down to a top up of transmission oil (this did happen) and potentially an overfill during service. There had been occasional mild spotting in the past on the garage floor, but nothing like this.

It turns out that the leak has been ongoing for a few days and the mechanic found the source. It is a hole in the Selec-Trac xfer case that might be missing some kind of plug. The question is, should the hole be plugged or left alone because it is designed to overflow or release pressure/breather?? If it needs a plug, what kind of plug is it and what is the part called?

I have no photos from the mechanic. My own photos just show an oily mess around the xfer case and nothing specific.

It is a 95XJ Sport. Thanks in advance for any insight.