Some fluid is leaking from the back of my 4í—4 tracker its all ober my passenger back tire what could it be?

What is your question?

Sounds like its grinding in the back of truck. Going fast on highway is worse sounds like no break pad in back of truck

What makes this problem better or worse?

Driving fast it grinds from back side.

How long has your 2002 Chevrolet Tracker had this problem?

3 days