[Z06] Popping/knocking from Rear End under hard acceleration
#1
Popping/knocking from Rear End under hard acceleration
My mostly stock (heads fixed) 2007 z06 with 21k miles makes a weird noise from the back under hard acceleration. It only makes the noise starting from the top of second at WOT. If I'm cursing in 6th at 80 and accelerate, I don't hear it. It only happens under hard acceleration. Does anybody have any ideas what it could be? Quick check under the car doesn't show anything loose or hanging, haven't lifted it up to see.
#2
Drifting
My mostly stock (heads fixed) 2007 z06 with 21k miles makes a weird noise from the back under hard acceleration. It only makes the noise starting from the top of second at WOT. If I'm cursing in 6th at 80 and accelerate, I don't hear it. It only happens under hard acceleration. Does anybody have any ideas what it could be? Quick check under the car doesn't show anything loose or hanging, haven't lifted it up to see.
for me the best way to replicate it was a 2nd gear punch from 4k. the noise for me appeared to be coming from my rear passenger compartment area, but as much as the noise I felt a hesitation and loss of power to the wheels during the time the noise was present.
you feeling anything like that?
Good luck. I'm far from the best mechanic type here but I'll bet someone can help you get sorted out.
#3
Melting Slicks
Member Since: Nov 2002
Location: North shore,Ma./Naples Florida
Posts: 3,059
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I have the same thing in the same area, but if I am in 1st or 2nd and just jab it to about 4000 RPM's. I am sure it's not traction control or axel nuts. When I shake the exhaust as hard as I can I get nothing. Been with me since the car was near new.
#8
Premium Supporting Vendor
Second this. Also check your leaf spring adjusters, if one is broken it may be making a noise on the LCA when under load/acceleration. I doubt your control arm bushings have deteriorated to the point to where they are causing any sort of noise.
#9
Burning Brakes
Not sure if what I found is quite the same but I had experienced similar sounds from what I perceived as coming from the rear. Recently I took off my H pipe and found the forward connector flange of the H pipe was rubbing against the forward part of the tunnel plate. I haven't taken it off the jack stands yet, but I believe the rubbing could have caused much of the noise I experienced under acceleration. Best of luck to you!
Last edited by Dirk Miller; 01-23-2019 at 10:22 PM.
#12
Melting Slicks
#13
Bean Counters
GM bean counters changed the designers material wishes with plastic-like parts at locations all over the place... Increase the diameter of sway bar, change end links to metal, install new bushings... You'll be so happy with the new feel of the C5 you won't be able to wipe smile from your face! 😀
#15