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Old 04-06-2011, 12:04 AM
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Knockin sound coming from underneath

Like the title says fellas. I started my vehicle and all seemed well, when I began to drive forward I heard a knocking sound that seemed to get faster as the wheels turned and slowed down when I hit the brakes. It did not do it when idling only when moving forward or in reverse. It lasted for about 10 minutes before it went away then when I made a left turn the vehicle shook when making the turn and It hasn't acted up since then. This was today. Any ideas of what it was?
On a side note a wind gust caught my door and yanked a hinge about 1/4 inch off from where it should be. Local shop quoted me $50 for pressing it back to where it should be and welding it in place as the cheapest option. That sound fair? I thought it did.
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Brian: 2008 Jeep Green Metallic Grand Cherokee : 3.7L
Mods : K&N Intake, FRP Throttle Body/ ported intake manifold, Hypertech Tuner, SRT Rear Sway Bar, WK Bilstein Shocks/Struts, SRT Rear Bumper, SRT exhaust, Custom SRT Design Badge, MyGiG RER, Green LED Interior, Kicker Amp & 10' Sub, LED dome lights, BA speakers.

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Old 04-06-2011, 05:57 AM
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Re: Knockin sound coming from underneath

that should have been free cuz it probably took then 2 secs to adjust your door lol. i had a similar knocking sound on my 05 limited and it was my emergency brake pad. if you take the rear rotor off, the pads are inside, my pad came disconnected from the plate it mounts on and clanked around in there. emergence brake pads were not cheap and a b***ch to put on!
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Old 04-06-2011, 10:47 AM
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Re: Knockin sound coming from underneath

Well it hasn't been done yet. When I took it to the guy he pulled the door down so it would clear the fender so it's working as of right now but I'll see how long it holds lol.

Back to the knocking, it hasn't done it since yesterday morning but I haven't driven today so I'll check in a little bit. Thanks for the help.
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Mods : K&N Intake, FRP Throttle Body/ ported intake manifold, Hypertech Tuner, SRT Rear Sway Bar, WK Bilstein Shocks/Struts, SRT Rear Bumper, SRT exhaust, Custom SRT Design Badge, MyGiG RER, Green LED Interior, Kicker Amp & 10' Sub, LED dome lights, BA speakers.

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Old 04-07-2011, 05:51 AM
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Re: Knockin sound coming from underneath

check to see if it does it in a parking lot when you're turning sharp also
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Old 04-07-2011, 11:03 PM
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Re: Knockin sound coming from underneath

Well I drove quite a bit today and nothing. It feels fine and the sound hasn't returned. Maybe something got caught on my tire? but I checked and saw nothing so I dunno what it was.
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Mods : K&N Intake, FRP Throttle Body/ ported intake manifold, Hypertech Tuner, SRT Rear Sway Bar, WK Bilstein Shocks/Struts, SRT Rear Bumper, SRT exhaust, Custom SRT Design Badge, MyGiG RER, Green LED Interior, Kicker Amp & 10' Sub, LED dome lights, BA speakers.

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