Poly Rear leaf spring bushings and shackle question, 04 1500 4 wd

[Joe.G]

Hi, I just ordered a set of Black Energy suspension rear Leaf spring bushings, They are marked for a 2 WD but everything I have researched show that the 2 and 4 WD use same factory bushing.

I also ordered new shackles since the bushing in them are getting to look a bit rough, Any tips are changing this stuff? Is it worth it to go Poly or should I have used Rubber?

Am I right that 2wd and 4 wd use same bushing?

Will I notice a difference?

I also ordered new Bolts and Nuts.

 

[usaf2006]

Should be the same. From what I understand, poly will out last rubber but may squeak occasionally.