What makes a three piece drive shaft better then a one or two piece?

Question

What makes a three piece drive shaft better then a one or two piece?

Answer 1

less flex of a longer one .... like in a truck you wouldnt be able to go over any rought ground that would back the rear end drop  or bounce... very high without one..... flexable

Answer 2

Can't have a one piece because the suspension moves, therefore the drive shaft must accommodate the movement by means of a slip yoke.

A three piece is used when the angle are greater than 15°.  A "CV joint" is added @ the diff. On a long wheel base pickup a steady bearing is use to support a long shaft, also considered a 3 piece.

1. Slip Yoke

2. Shaft

3. CV Joint or steady bearing

Answer 3

a three piece will have a greater flexibility to compensate for a larger suspension travel.