I just got finished with a full knuckle rebuild all new bearings and seals. Had 3rd members re geared to 4:88 and ARBs installed at a shop. Took it on a test drive and I am getting a pretty good vibration in the front end around 55-60mph mostly on deceleration, gets a little better without front driveshaft but is still there. No vibration before work was done. Any thoughts?