NM51;
How is the rack connected to the column on your Jeep? Seems to me the big issue with hanging the rack on the axle would be connecting it to the steering column in a way that wouldn't bind or cause steering deflection on rough roads.
Speed

1954 GMC 350
1957 GMC 1/2 ton
1962 Chevy C-30
1952 Chevy 6400 dump bed project truck
'98 Harley FLSTC
'66 Pontiac Catalina
'76 Chevy 1 ton Duallie
'84 Bronco II
'78 Dodge W-200
'81 Toyota 4X4 truck