i currently have a 4.5" lift and i want to add another inch to get 5.5 but i dont know if i have to modify my drive shaft or lengthen any thing in my drive train does anyone know how much lift you can do without doing any drive train mods ohh and i do have a 1" transfer case drop thanks your input would be highly appreciated

 

It kinda verys for each xj some people put a 3" lift on & get vibes then others can put 8"s on with no vibes! I'd say you'll be ok, as you already have a 4.5" lift with no vibes 1" more souldn't hert

 

i have slight vibes, but i think its due to tires out of balance.. and i have about 5.5 inches of lift with 1 inch t case drop