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  1. 07.5-10 LMM Duramax Powertrain
    Alright I have a 2008 3500hd. When I let off the gas it makes a awful roar. Acts if I am hitting the brake. I noticed it started leaking oil around the driveshaft today as well. When I hit the throttle it all goes away. When you are getting close to stopping it acts if it is hanging on...