hello all.my 1990 xj is leaking trans fluid from i believe to be the lil plastic push/click inserts that connect the lines to the trans fittings.are these available new say at like napa? also im having some issues of the jeep jerking(donkey kick) quite badly,when i place the jeep in reverse??? would this be my trans going out,or possibly ujoints???? PLEASE any help/sugestions,are GREATLY apprecited!!!!