Sounds like someone put an after market set of coil helper springs in, probably in an attempt to give some lift back to tired leaf springs. do they bolt to the axle housing with U-bolts and hit the frame at the bump stops?
They may interfere with articulation if you wheel it hard. Park the jeep on a level surface and measure the bumper height, pull out the helper springs and measure again, see if they make a difference.( i would get rid of them all together) They may also make the ride stiffer.
1982 cj7. Frame off. shell valley kevlar body, stainless hinges, Bestop seats and supertop, KC titanium lights, Homemade swing out tire carrier with spare front wheel bearings/hub, Built 304,DUI,Edelbrock shorty headers with dual stainless 21/2 tubes into incynerator cans 21/4 dumped out the back,Edelbrock 600cfm, performer intake and cam, Borgeson lower column, Centerforce clutch, NV-4500, Dana 300 w/custom built twin stick, Homade 1/4" steel skid plate, 2.5 soft ride w/ 1" shackle lift, 33x12.5 mtr's. Stainless fuel and brake lines, Braided hoses. more...