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Guys I just upgraded to the camaro 3.45 rear diff and it came with upgraded energy suspension poly bushings. I put in Amsoil 75-90 with the LSD additive. I am now getting a whine that starts about 45-50 and up but it is relative to throttle. More throttle I get more whine. I have no vibration. If its the bushings wouldn't I hear it at all speeds? I have read that going back to stock bushings solve this but I can't find anywhere to purchase just the stock bushings. Can you guys help or point me in the right direction? Thanks
Mike
Mike