vibration

Hey everyone! A month or two ago I installed the pypes high cat back exhaust. Definitely loving it except one thing. When I am at low speeds such as backing out of the driveway I believe the tail end is rattling on the frame. Not the biggest deal in the world as when I drive on the road it...

2015 Rubicon JKU 4" lift, 35s 65k miles I got this JKU this summer and just noticed the front driveshaft had a lot of slop so replaced it with a double cardan shaft (single u-joint at front differential, double at transfer case). I installed it yesterday and now have a mild vibration at 55mph...