[DirtyLarry]

I work for a spun off division of GM that manufacturers stripped chassis for the commercial step-van and RV market. We still use those same exact spring hangers and shackles on our Workhorse W-series chassis today (previously known as the Chevrolet/GMC P-Chassis). Depending on the leaf spring pack, length, and type (multi-leaves vs. parabolic) we flip the shackles around one way or another. Often times during production the shackle gets flipped the wrong way for the spec’d spring type and guess what? We have found that it really doesn’t make an ounce of difference which way the shackle is mounted in 90% of the cases. However, it does cause interference issues on units with extremely large spring packs with long spring blades.

Below is a picture of a 2007 UPS truck with multi-leaves with the shackle pointed with the big opening to the rear of the spring pack. UPS can break an anvil but they have never bent or broke one of these Detroit Steel Products shackles. I have never had a problem with a stock DSP shackle on any of my junk either.