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At parking lot speeds when getting on the gas from a roll or upon slow speed manual downshifts followed by throttle application I will get a intermittent metallic bang that
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A True Z Fanatic
Join Date: Jan 2016
Location: Atlantic SE
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Drives: '10 K23 ST 7AT
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At parking lot speeds when getting on the gas from a roll or upon slow speed manual downshifts followed by throttle application I will get a intermittent metallic bang that sounds like hitting the rear end with a sledge hammer. It has also happened when going from park to drive or park to reverse on occasion.
It sounds similar to the noise a LSD aftermarket mechanical differential can make when locking like my 2020 Silverado 1500 does. While I understand a car can be put back to stock, when I bought it used in 2017 w/72k miles on it, tint wasn't even applied to the windows so it's doubtful the OE LSD was replaced with an aftermarket diff. I only do spirited street driving, never drag raced, autox'd, etc. and currently have 102k miles. Pertinent mods are; OE subframe bushings with Z1 collars, diff. brace bolted to the subframe, and Whiteline poly diff bushings. Would this noise be indicative of upcoming diff. failure or can it be attributed to sudden slack take up between the pinion and ring gears? Thanks for any insight you can lend. ![]()
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Toys Not Tots Last edited by Tractionless; 06-18-2024 at 11:22 AM. |
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#3 (permalink) | |
A True Z Fanatic
Join Date: Jan 2016
Location: Atlantic SE
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Drives: '10 K23 ST 7AT
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OE subframe bushings with Z1 collars, diff. brace bolted to the subframe, and Whiteline poly diff bushings. As you've probably noticed I was doing a VR30 trans swap recently and checked the diff. bolts and brace bolts when under the car., all tight Additionally, the noise was present with both transmissions. Really sounds like a loud "ping" as if you hit the diff housing with a substantial hammer.
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Toys Not Tots Last edited by Tractionless; 06-18-2024 at 11:23 AM. |
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A True Z Fanatic
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#5 (permalink) | |
A True Z Fanatic
Join Date: Jan 2016
Location: Atlantic SE
Posts: 1,296
Drives: '10 K23 ST 7AT
Rep Power: 30525 ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
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![]() I'll get a look at the axle nuts as soon as I can and already have Kawi nuts in the toolbox waiting on install the next time I pulled the wheels. The driveshaft is a new Godzilla for the VR30 swap that was at a driveshaft shop for rebalance and they blessed the assembly less than 500 miles ago. I'll definitely check the U-joints if the problem persists after replacing the axle nuts and update the thread on my findings for the archives. ![]()
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