Originally Posted by: guitar1916

I either lose any volume by the time I've done the last slide, or I manage to make it buzz by sliding short on one of the four slides.

This tutorial on funk style guitar covers that technique.

https://www.guitartricks.com/lesson.php?input=12406&s_id=632

That type of move requires a few things all working in tandem.

1. Lock your fingers into place on the fretted notes.

2. Place thumb solidly on back of neck to use as a pivot.

3. Slide your fingers back & forth.

The real trick involved here is to stay relaxed & smooth while maintaining enough pressure to keep the fretted notes ringing.

Hope that helps!