Is your vibration at 43 and 54mph coasting or under acceleration? we had a car in the chry shop once with sort of the same problem,i brought another identical car in a different bay,removed all four wheels from our car to customers,road tested customers car afterwards,still had the vibration,brought it back in a took the time to swap cv shafts,road tested again,but still had the vibration.it ended up being the bushings in the transmission that keeps the CV shafts from wobbling.
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Is your vibration at 43 and 54mph coasting or under acceleration?
we had a car in the chry shop once with sort of the same problem,i brought another identical car in a different bay,removed all four wheels from our car to customers,road tested customers car afterwards,still had the vibration,brought it back in a took the time to swap cv shafts,road tested again,but still had the vibration.it ended up being the bushings in the transmission that keeps the CV shafts from wobbling.