Hey all, I have a 2002 4.0L and I have a vacuum leak where the TPS mounts. I assume there is an O-Ring inside the Throttle Body to seal this off but I cannot find a rebuild kit or an o ring set for this thing, Any ideas on where I can fond something or am I looking at replacing the whole throttle body? See picture and video link. Thanks all!!

 

I've no experience here but given the affordability of these throttle bodies, your most time efficient method might just be replacing it.
If you can be without your Ranger for a while, have at repairing it.
I'm guessing you'll break the pivot when you endeavor to reach the O-ring.
Do you even have a hardware store which still has an O-ring drawer?

 

You could try a small RTF bead around the TPS housing to seal it taking care not to get any near the positioning mechanism...