So as some know, I've been trying to sell this old Grand Prix for a while now. I haven't been refreshing the ads because there is a noise in the front end that I can't seem to find, and I surely cannot sell it with this racket. Struts are new, strut mounts are new. Hub on the right is new. Tie rods, ball joints and all the bushings seem tight as well. Calipers and brackets are also tight. Car drives fine otherwise (as in not any worse than before the noise started).

I got a video of it, after about the 0:52 mark you can hear it pretty well.
https://youtu.be/WpRgyvmBrLE

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-Ryan
2004 GTO....LS1, LSA supercharged 525whp, 6MT
96 SSEi...September 2010 COTM........GONE
04 GTP comp G.... December 2015 COTM........GONE
2013 Audi Allroad Quattro

hi, did you check control arms?

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poverty forces one to do unorthodox things

2000 SSEi
past rides:
1996 SSEi
1992 GTP
1987 Grand Am

Yes, control arms are fine, as well as the sway bar bushings.

_________________

-Ryan
2004 GTO....LS1, LSA supercharged 525whp, 6MT
96 SSEi...September 2010 COTM........GONE
04 GTP comp G.... December 2015 COTM........GONE
2013 Audi Allroad Quattro

I would try hitting the bumps with one tire only and see which makes noise. Also are you sure it's front end?

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2003 pontiac bonneville Sle with kenwood sound system. Upgraded tweeters, door speakers, deck speakers, kenwood sub and amp. Rage r20 18inch rims. Front and rear KYB shocks and struts. GXP Strut tower brace.. She's a work in progress still

Crazy thought here - is the exaust downpipe knocking the sway bar or something else on the subframe? I didn't actually watch the video, just going by memory.

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Boost addict


The Fleet:
'93 SSEi - Twincharged + manual Build thread
'97 Camaro - Top swap
'05 STS - V8, AWD, her DD
'92 Trofeo - Fair weather DD
'99 Montana - top swap 3800
'04 Sierra 2500HD - LLY Duramax

Current project:
Something cool, trust me.

Upcoming projects:
'92 Bonneville SSE
'87 LeSabre T-type
'67 LeSabre

Gone to greener pastures:
'84 Sierra Classic - Twin turbo 3800
'97 LeSabre - Top swap

RIP:
'86 LeSabre - pictures
'93 SE - L67

It shouldn't be, all the loose parts are just past the Y pipe.

_________________

-Ryan
2004 GTO....LS1, LSA supercharged 525whp, 6MT
96 SSEi...September 2010 COTM........GONE
04 GTP comp G.... December 2015 COTM........GONE
2013 Audi Allroad Quattro

I was going to ask if it was exhaust too. The exhaust could be tight, it may be something hitting it. Also was going to ask if it was something suspension in the rear.

I daunting thought, Is the subframe itself tight to the car and/or not rotted...

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Retired Bonneville Owner and former GM Tech:
2004 Pontiac Bonneville GXP: Black/Ebony *SOLD*

Summer Toys: Combined 827 RWHP / 877lb/ft RWTQ
2004 Pontiac GTO: Impulse Blue Metallic/Black/M6: lots 'o mods, 415 RWHP / 405lb/ft RWTQ!
2006 Cadillac STS-V: Light Platinum Metallic/Light Gray/A6 - Spectre CAI, Magnaflow exhaust, Speed Inc. tune, 412 RWHP / 472lb/ft RWTQ

Daily Drivers:
2019 Chrysler Pacifica Limited: Mommy's new RGC
2015 Chrysler Town & Country Limited Platinum: Kids new RGC
2007 Chrysler Town & Country Limited: Sold to neighbor
2009 Pontiac G8 GT: L76, Sport Red Metallic
2003 Chevrolet Suburban 2500: Doeskin Tan - 8.1L Big Block... new plow truck
1999 Chevrolet Suburban: Sunset Gold Metallic - Daddy's winter beater and plow truck

I'm positive the subframe is ok, that was the first thing I looked at. I'm wondering if it's the strut cartridge moving around. It's tight but it had come loose at one time and maybe somehow it got damaged.

_________________

-Ryan
2004 GTO....LS1, LSA supercharged 525whp, 6MT
96 SSEi...September 2010 COTM........GONE
04 GTP comp G.... December 2015 COTM........GONE
2013 Audi Allroad Quattro