So the strangest thing - just bought a 99 Wrangler with a 4.5 Rubicon longbar system and some big 35s on it. Me and my 2 son's first Jeep experience. the TJ Wasnt running when we bought it, so we R&Red the engine and the clutch and now we can drive it. Issue is, when i take off in first gear, a low groaning sound is comes from the back end of the Jeep. It goes away as you accelerate, and I know for sure I need to replace the shocks and lower control arm lower bushings... could that be where the sound is coming from? it only occurs upon acceleration or backing up.