gene knight Posted May 19, 2015 Report Share Posted May 19, 2015 Okay I have heard or seen a write up about using 720 4x4 leaf springs to lower trucks without using blocks, well I replaced my 521 leaf springs tonight with 4x4 springs and no change. 1 Quote Link to comment
gene knight Posted May 19, 2015 Author Report Share Posted May 19, 2015 720 leaf springs 1 Quote Link to comment
Charlie69 Posted May 19, 2015 Report Share Posted May 19, 2015 Gene are you smoking crack again? LOL Call me in the morning and I will help you figure this out. Quote Link to comment
Farmer Joe Posted May 19, 2015 Report Share Posted May 19, 2015 did you simply take them from the 4x4 and put them in the 521? ive done a 720 4x4 leaf swap myself on my 620... i took the pack apart and swapped the thick overload on the top, and removed that little overload leaf. didnt need it. i had to use a C-clamp to to draw the leafs back together when i had the thick one on the top. used a new allen head 3/8x16 bolt and a nylock nut. hope this helps.. 1 Quote Link to comment
jrock4224 Posted May 19, 2015 Report Share Posted May 19, 2015 i have done this swap many times and its worked all of the times ... i change nothing but remove those pads ... and the set on my truck had helper overloads that i removed that had actually de arched the spring ore and i got more lows.... ..... maybe u just put the 521 ones back on on accident 1 Quote Link to comment
gene knight Posted May 19, 2015 Author Report Share Posted May 19, 2015 Nope I labeled the 4x4 springs as soon as I got them, but me and charlie69 did some measuring and we found out that the 521 springs that I took off already had 2 of the leafs removed prior to me buying it back in 2005. So it looks like it did drop about 1 1/2" compared from stock oem 521 leaf packs. 2 Quote Link to comment
gene knight Posted May 19, 2015 Author Report Share Posted May 19, 2015 I guess lack of sleep messed with my mind 1 Quote Link to comment
jrock4224 Posted May 19, 2015 Report Share Posted May 19, 2015 i know that feeling 1 Quote Link to comment
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