Over the years I've been tracking down and fixing the oil leaks in my ol' 1997 T444e. Most of the leaks were minor, but contributing to the overall slop spraying around the chassis (rust protection!). Except for the oil pan. It eventually started leaking with a steady drip. No rust or anything, but a bunch of the bolts let loose. I used loctite this last time around.
Otherwise I found leaks at and fixed:
- the oil cooler;
- the front oil pump gear inspection cover;
- the rear main seal (wouldn't have bothered with that minor leak, but the only good way to seal the oil pan was to remove transmission so it was worthwhile to do);
- the dip stick holder.
If you have a leak up front I'd check around the Cam Position Sensor. Maybe pop it out and investigate the o-ring. Also take a look around the oil pump gear cover. It looks like this: