Unforgiv3n

Today I realized that while decelerating my car makes a rotational knocking or fluttering type noise. It makes this noise in and out of gear but it is louder while in gear. It does not make the noise at idle, only while the car is moving. Any idea of what this might be?

WickedSS2005

iTrader: (1)

Mine does this on occasion... Kinda of like a whirling sound?

Unforgiv3n

Meh its hard to describe. Ill try to record it and send it to you tom. Actually I'll try to post it on here. That might help. I do know that I dont like it

WickedSS2005

iTrader: (1)

Bring me some turkey/stuffing/sweet potatoes tomorrow while I work 16hrs, and I'll take car of your car lol

Unforgiv3n

F that. I have the next two days off!

but you can still fix my car if you want.

WickedSS2005

iTrader: (1)

No food, no fix

qwikredline

trans?

CobaltLs_14

FLywheel or flywheel bolts or even clutch...

i had the same problem and it was my flywheel and flywheel bolts and it fucked up my new clutch so i had to buy a new one...

this might be it not totally sure though i would have to hear the sound but just an idea

Unforgiv3n

I really hope it's not the transmission as for the sound let me see if I can get a decent recording of the sound. I don't seem to feel any extra slipping of the clutch. Did you have that issue when you ran into your problem. If I had to explain the sound I would say it kind of sounds like there is a nail in my tire just not as much of a clicking noise. But that is he pattern I hear while driving.

CobaltLs_14

no my clutch was grabbing fine but sounds like the same thing your going through... i dont know how mechanically incline you are but try this-

1. drain your oil out of your car and remove the oil pan
2. turn your wheels all the way to the right so you can get access to the crank pulley (18mm socket i believe dont remember) you should be able to see the flywheel and the rods and all that stuff
3. (2 person job) rotate the crank pulley so you can hear the noise. press on the flywheel firmly while the crank is being rotated if the noise stops there then it the flywheel and clutch.
4. while your down there check your rods and bearings too. if it all checks out to be ok then looks like the tranny is the problem.
5. clean the oil pan and re silicon the edges (5 bucks at auto zone) and bolt it back on let stand for 30 min or so add oil and should be good as far as putting back together.

but good luck and check thoroughly hope this helps...

Unforgiv3n

I'm not the greater mechanic but I can typically get the job done with guidance. Thanks for the pointers, this will help a ton. Roughly how long will that process take?

CobaltLs_14

it took me about 30-45 mins no long at all but you will get dirty wear clothes that you dont car much about

i also edited the post above any questions just ask...

D4u2s0t

if it only does it at decel, are you sure it's not normal exhaust popping?

CobaltLs_14

post a sound clip when you can

Bad05SS

throw out bearing

CobaltLs_14

throw out bearing shouldnt make a knocking or fluttering noise while in gear and going up in rpms but who knows

Bad05SS

eww the last time i head that noise, come to think about it was in my friends 350 he fried the piston ring with let the piston slap at high rpms but not at idle

Unforgiv3n

Yeah i thought I may be the exhaust, I put a new dp on but it doesn't sound anything like exhaust pop. And as far as a piston ring, it does it at all rpms not just higher rpms

THRcobalt07

I get this same sound as well. I've always assumed it was something in the the trans

CobaltLs_14

have you tried what i said taking the oil pan off and what not?

Unforgiv3n

No, I haven't had the time, I have been out of town for thanksgiving, I may try it out tomorrow if I get off work on time.