I'm new to jeep, 6 months now I've had my 91 cherokee. I just installed a 2" budget lift. Spacers and blocks,yes,I'm that poor. Now, if i take it up to 65 mph, I can feel a slight vibration which I can only assume is my driveline. Now, I don't need to go that fast, I just want to know if I should be concerned, and if so, what are my "budget" options?