just got this 1990 comanche with the 4.0 its my 1st 4.0 but its faster than my grand cherokee with the 5.2 i think its got a chip in it to but if i am doing 80 my front ends started shakeing and now it does it almost everytime i go 50 or fast and everything is tight but there is play in the wheel i can't figure it out can anyone help its all stock suspension has a bad u joint but that shouldnt make a death wable