OK ,I have a 2002 jeep wrangler with a 2.5" rough country lift,4.0 , automatic trans,the jeep runs out fine ,shifts smooth and on time every time,the problem is vibration, runing down the road while excelerating i get a vibration .let of the gas it stops ,give it gas it vibrates as long as it's under a load .take foot of gas it stops,put jeep in nutrial give gas no vibrtion,put in drive give gas starts to vibrate ,does not make noise ,got wheels /tires balanced did not help, could this be a drive shaft or trans problem or a rubbing or a stress problem some where ,the trans shifts varry smooth and guit,its not a bad vibration but its there . could this be from the lift ,some binding or mis alinement issue or what . any info will be thankfull.