How do change the clutch slave on my 1988 ford ranger 2.0?

And did you ever get your sender replaced yet?
How do change the clutch slave on my 1988 ford ranger 2.0?
Purchase a Haynes repair manual. Get familiar with the job. Not hard to do, just takes time.
How do change the clutch slave on my 1988 ford ranger 2.0?
You have to pull the transmission, it is behind it.

It is an involved job, especially on the 4x4 engines.

Take care not to damage the clutch hydraulic line. On the 2.8 engine it is held in place with a pin not a quick release link. The 2.8 engined clutch line has a residual pressure valve in it to keep the clutch adjusted. Also when bleeding it will need to be pumped up again after bleeding (Chilton's does not tell you this).

Check the Ranger forums.