Hi everyone!
I actually have a 1991 Nissan D21. The leaf springs at the back are sagging for quite a while now that it is actually binding with the overload springs and it rides very very bouncy so I decided to replace only the 1st and 2nd leafs on both of them (1st and 2nd only due to budget limitations). I've also inverted the overload springs (3rd and 4th leafs) for added comfort for I really don't carry a ton of load everyday cause this truck is my daily drive. So, after I've finished installing the new springs. I've noticed that the right is still sagging about an inch, though I'm already using 3 inch extended shackles. I would also like to add that I'm running on a full tank. Dose being on a full tank put a lot of strain on the right leaf springs that is causes this to sag so much or is there anything else that causes this?
Thanks!
-josh