Odd sound

Wataru · January 19th, 2010, 10:08 AM

Havent posted in awhile but I figure this is probably the best place to ask...

On occassion and it's not everytime, when Im driving, sometimes right before I accelerate and right before I stop, the car will "clunk". It sounds like when you have too much stuff in the back of your car and it all rolls forward to hit the trunk walls.

I noticed it was worse when we had 20-40 degrees here.

mattf0509 · January 19th, 2010, 03:13 PM

Sticky lifter, bent rod, drivetrain...possibly a motor mount it was kinda a vague description

goren813 · January 19th, 2010, 04:07 PM

Sticky lifter would give more of a flutter, exhaust leak type sound upon acceleration. Possibly something suspension wise, and motor mount possible... but yeah kinda vague, more of an area of the car, or a better description of when it occurs.

RFM 40th V6 · January 19th, 2010, 07:22 PM

Mine does the same thing but it's because my rear control arm bushings are worn out.

lcorriveau3 · January 19th, 2010, 07:50 PM

WHat about the bodies in the trunk, they could be shifting!!

Actually is it a clunking from the rear end? Sounds like you could have a bearing going in the rear diff.

Wataru · January 20th, 2010, 09:57 AM

its a clunk from the rear. Best example would be if you had a car with a non-secured spare tire in the trunk and when you stopped or kicked off fast when accelerating, it would roll around and hit the trunk walls.

mattf0509 · January 20th, 2010, 10:07 AM

Have you checked the spare? Lol

goren813 · January 20th, 2010, 10:11 AM

Originally Posted by mattf0509

Have you checked the spare? Lol

+1

And after that, check out your spring isos, and all the bushings in the rear suspension, as well as the rear brakes. And make sure your gas tank isn't able to move around...

Wataru · January 20th, 2010, 10:23 AM

Originally Posted by mattf0509

Have you checked the spare? Lol

...yes it was the first thing I checked.

Im going to take it in with my tax return and do some regular 70000 mile junk, plugs, wires, flushes...

lcorriveau3 · January 20th, 2010, 07:48 PM

Have you checked to make sure that one of the shocks hasn't broken a mounting bolt?
It's gotta be something simple just have to find it. I also wonder if it is backlash in the rear differential. I had noise in mine a few years ago and ended up rebuilding (new bearings and seals) when I changed to 3.73s.

January 19th, 2010, 10:08 AM	#1
Wataru Enthusiast 2000 Mustang V6 Join Date: Oct 2009 Location: Casselberry, FL Posts: 560 iTrader: 0 reviews	Odd sound Havent posted in awhile but I figure this is probably the best place to ask... On occassion and it's not everytime, when Im driving, sometimes right before I accelerate and right before I stop, the car will "clunk". It sounds like when you have too much stuff in the back of your car and it all rolls forward to hit the trunk walls. I noticed it was worse when we had 20-40 degrees here.

January 19th, 2010, 04:07 PM	#3
goren813 MM's Official Lucifer '00 3.8L & '05 4.6L Join Date: Apr 2008 Location: Odessa, FL Posts: 3,620 iTrader: 0 reviews	Sticky lifter would give more of a flutter, exhaust leak type sound upon acceleration. Possibly something suspension wise, and motor mount possible... but yeah kinda vague, more of an area of the car, or a better description of when it occurs. __________________ "Fast she goes...in the city of Overdose"

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January 19th, 2010, 03:13 PM	#2
mattf0509 Regular 2000 3.8L v6 when i finished track was closed Join Date: Dec 2008 Location: Houston Posts: 186 iTrader: 0 reviews	Sticky lifter, bent rod, drivetrain...possibly a motor mount it was kinda a vague description

January 19th, 2010, 07:50 PM	#5
lcorriveau3 Enthusiast 1999 YAWN!!! what?? Join Date: Nov 2009 Location: N'oreast Posts: 692 iTrader: 0 reviews	WHat about the bodies in the trunk, they could be shifting!! Actually is it a clunking from the rear end? Sounds like you could have a bearing going in the rear diff.

January 20th, 2010, 09:57 AM	#6
Wataru Enthusiast 2000 Mustang V6 Join Date: Oct 2009 Location: Casselberry, FL Posts: 560 iTrader: 0 reviews	its a clunk from the rear. Best example would be if you had a car with a non-secured spare tire in the trunk and when you stopped or kicked off fast when accelerating, it would roll around and hit the trunk walls.

January 20th, 2010, 10:07 AM	#7
mattf0509 Regular 2000 3.8L v6 when i finished track was closed Join Date: Dec 2008 Location: Houston Posts: 186 iTrader: 0 reviews	Have you checked the spare? Lol

January 20th, 2010, 07:48 PM	#10
lcorriveau3 Enthusiast 1999 YAWN!!! what?? Join Date: Nov 2009 Location: N'oreast Posts: 692 iTrader: 0 reviews	Have you checked to make sure that one of the shocks hasn't broken a mounting bolt? It's gotta be something simple just have to find it. I also wonder if it is backlash in the rear differential. I had noise in mine a few years ago and ended up rebuilding (new bearings and seals) when I changed to 3.73s.

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