duncombe1 Posted July 21, 2008 Share Posted July 21, 2008 I just bought this Ls 400 and it had rear end noise. Bought new tires...noise gone. Now that it is quiet I can hear a whine upon deceleration. Any help? Thanks. Quote Link to comment Share on other sites More sharing options...
UCF3 Posted July 21, 2008 Share Posted July 21, 2008 more!!! Quote Link to comment Share on other sites More sharing options...
duncombe1 Posted July 21, 2008 Author Share Posted July 21, 2008 It seems to be coming from the rear axle area. However if I shift to 3rd instead of overdrive the noise is almost gone. I thought maybe the trans but that of course is further up front. I don't understand why the noise goes away in 3rd. but loud when in overdrive. The noise can be heard whenever you take your foot off the accelerator....even if for 2 seconds. Quote Link to comment Share on other sites More sharing options...
nc211 Posted July 21, 2008 Share Posted July 21, 2008 replace your rear differential fluid with a quality synthetic fluid. Lots of info on here about that, run a search for differential fluid to learn more. Quote Link to comment Share on other sites More sharing options...
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