softer,more flexible and less jumpy suspension


hello i have a daihatsu rocky with leaf springs all around and its kind of jumpy on and off road. i am having all four build brand new at a local place that knows about leaf springs, now my question is: is it true that i can install a coil spring between the axle and chassis to make a softer ride??????

my rocky is sitting on 265 tires with 15inch rims but is more for the look ( 70% on road and 30% off road )

please let me know anything easy to make a more softer,flexible and less jumpy ride.

Its an old workhorse fourtrak

If you want a less jumpy ride buy a car or stick a pillow under your bum! its on leaf springs...

Full of ideas but no time to do them!!
youtube: Redfourtrack