Pivot
This left hand Bass Technique that has two elements that make it easier to cross the neck. The first bass technique is pivot where instead of shifting to a new position, you pivot from the left hand 4th finger to the index which shifts up or down two positions.
You can download the notes, tabs and mp3 play-alongs on my Patreon page https://www.patreon.com/posts/38736722
Visit my
Youtube Channel
Stretch
The second element is to use a stretch. For instance a stretch of two whole steps from C to E using the the index finger to the fourth finger or in reverse, from fourth finger to index. This will move your hand to one position lower or higher with very little motion.
Stretch example explained on video