You definately want to stay away from T-Case drop "kits". With a 4.5" lift you will not need it, hell I'm running a 5" lift and get NO vibes until I hit 85MPH+ and even then they are VERY minimum and are probably due to knocking wheel weights off when I go wheeling <img src="/forums/images/graemlins/notooth.gif" alt="" />. The only way I can tell that it vibes is because when I look in the rear view mirror I see the vibes in the images ever so slightly. Also I'm not sure if you're aware of this but the already crappy OEM T-Case linkage on your jeep has attachment points on both the T-Case AND the jeeps body, SO if you lower the T-Case the 1 inch given with one of these "drop kits" you will sevearly bind the already crappy T-case linkage because the attachment point on the body is FIXED and cannot be moved. Try shifting into 4LO with one of these "drop kits" installed and you'll see what I mean. The 4.5" kit they are selling is what is considered a "Front to rear swap" in which you put lift springs in the front and take your OEM front springs an replace your rears with them giving you about 3" inches of lift in the rear, that is why they also throw in the spacers for the rear to make up the difference. You will not get adjustable control arms with this "kit" and those will do more for you with regards to eliminating vibrations than ANY t-case drop because adjustable arms allow you to set the pinion angle on your axles to minimize/eliminate vibrations and will allow you to adjust your axles in the wheel wells to minimize rubbing on the fenders if you're planning on running tires bigger than the stock ones. I would say get a full kit and do it right the first time cause you'll probably spend as much $$$$ if not more going this route <img src="/forums/images/graemlins/kewl.gif" alt="" /> ...

HTH,
Fred R.