I would make sure your upper ballpoints are ok. in most cases if the upper ballpoint is bad you need to change the control arm/upper balljoint.(if it is a one piece). If you change the upper control arm you need an alignment immediately. where i live I had to pay $79 at sears fro a 4 wheel alignment.
I also would check the leafspring hangers and shackles for rust.
2004 Ext Cab, 4WD, 4.0, Auto, 146k. (4.0 engine is out of a 2009 Ranger w/96k) ( as of 3/10/2016)
2004 Ranger, Ext Cab, 2WD, 3.0, 5 speed , 4WABS, crank windows, no cruise, Edge 116k.(6/5,2014) (SOLD).
1999 Ford Ranger, Reg Cab, 2.5, 5 speed, 2WD, no AC, 150k (SOLD).