I'm new here so I thought I'd just say hi first. I have an 87 YJ with a 350 sbc and th 350 automatic tranny that me and the wife use for a daily driver and for pulling our tent trailer here in Alberta. That is until I installed the 2 1/2" lift on it. Now it shimmys and shakes like all get out when its pulling the trailer. I've lowered the tranny and shimmed up the pinion so I know the angle is good. Just replaced the rear U joints and had the shaft rebalanced. While I was at that I installed all new tie rods and front axle U joints which leads to my next problem.The front axle seals leak like crazy now. I`ve never changed these seals so I'm hoping someone can kind of give me the low down before I start. Sorry for the long post but I figured if I threw out both problems at once then someone might have some of the answers.