ZL1 Rear end noise
I have a 2012 ZL1. The rear end makes this weird humming noise, similar to the sound when your power steering is low, coming from the rear when the wheels are cranked in either reverse or forward. Any help would be great!!!
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Same here when she is cold. Once heated up it goes away! 2013 ZL1
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Since then, I haven't had the sound reappear. I think GM should look at extending the TSB to officially support the ZL1 as well. |
theres a private bulletin for the zl1's. Calls to flush the fluid about 3 times and in between those drive it so many miles doing so many figure 8's and a lot of nonsense, all in all majority of the time they are replacing the whole rear end, and when you get it supose to take apart the cover and brake clean inside to get the paint off. The paint they used inside on the gear in the differential to set it, isn't breaking down like its supose to contaminating the lsd.
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Im interesyed in thos also. I also notice some sort of loud winning noise espesially in 4yh or 5th gear. Dont recall as im giving it gas.
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Just change the fluid, it will go away! takes 20 mins to do. you have to get the diff fluid with ls additive already in it.
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I had this issue, dealer changed out the fluid and the problem went away.
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I just drained at the diff, and filled at the upper plug, noise stopped. If you feel draining at the diff is not good enough and want to get the lines and cooler drained, take it to the dealer. Im sure they use some sort of positive feed pump, but i dont think thats needed. |
Draining the lines and cooler would have no effect on the noise. The cooler is running transmission fluid and doesn't mix with the rear diff fluid.
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Thanks guys. Sounds like my dealership is changing my fluid!!!
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