I've heard that shackle flips puts the spring under tension instead of compression and this may adversely affect on the load carrying capacity and stability. I don't know why it would make a difference though. I guess it depends on what kind of loads you plan on towing.

Shackle flip puts the shackle under compression, as opposed to the stock tension style shackle.

well what if i put a S-10 style shackle on, my shackles are like after a shackle flip and thats stock...least im pretty sure they are, i would go out and look but cant its not home

what he said...I was just seeing if anyone was paying attention.

as far as i can tell the shackle is under tension before and after the flip... never is it under compression. i dont see how thats possible unless you dont move your hanger forward and your shackle actually leans toward the rear of the vehicle with weight on it. actually, i think you'd have to move the hanger toward the REAR several inches to put the shackle in a compressed state with weight on the springs. maybe we're thinking of two different things but the ride and load handling should be equivalent before and after a shackle flip.

i just realized what you're talking about... the pure vertical force on the shackle, NOT the force that the spring puts on it as it flexes. yes that is correct, stock is tension, flip is compression. in other words, if we put some huge impossible force on the shackle it would now collapse rather than rip in half, but so many things would break before the shackle that its not worth mentioning.

Drey, I have been looking for someone who's done this setup for a while! I got this idea of a shackle flip a while back while drinking beer in my shop looking at my Blazer! I robbed some front-rear hangers, and am now waiting for a free weeknight to do the job! Theorectically, this should give me 4" at the wheel, how much do you get?

i was thinking 4 inchs too, ive never done it, thats just a picture MNorby got off CK5