2008 Land Cruiser Noise (1 Viewer)

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I have a 2008 Toyota Land Cruiser. It has an ICON Stage 6 lift on 34 BFG KO2s. There is a random "bump" that occurs when taking off at slow speeds. This does not always happen but it only seems to be happening when rolling forward / slow acceleration from a complete stop anywhere from 20 to 40 feet forward. This noise is coming from the rear of the vehicle. It is not loud, not a banging noise but a light thump / bump. This started about a year after the lift was installed. It has not gotten louder and nothing seems to be broke. Any thoughts / advice / knowledge would be appreciated. Thanks -