chattering sound...help!!

[jmd2914]

alright, whenver i get up to about 3500 to 5000 rpm in second and third gear there is a chattering sound coming from somewhere near the tranny/drive shaft. anyone have any idea what this could be? it has me stumped. it also feels like there is alittle bit of power loss during the chattering.

 

[fiveohGT]

unbalanced driveshaft or could be rubbing something

 

[onefstsnake]

I have a similar sound.

But it occurs in every gear and even out of gear.
Its like a rattling noise. Looked under the car and couldnt find anything loose...

I dont notice much if any power loss though...

 

[jmd2914]

anyone? any ideas?

 

[onefstsnake]

well I actually had some knocking/detonation that sounded mechanical.

Check your timing. Is anything loose under the car?

Change anything recently?

 

[86bluecobra]

no chance you still have cats and they are coming loose inside? clogged up cats could explain power lose.

 

[jmd2914]

i do have cats, but i dont think theyre breaking up, one of them is alittle dented. also i dont have a front ebrake cable so my rear ones are tied up on the bottom of the car. if it is my cats breaking up, how can i fix it?

 

[87GTSnake]

if it is my cats breaking up, how can i fix it?

Get new ones.

 

[jmd2914]

using a bbk x pipe, is there any way i can make cut outs for the cats? using exhaust clams and extra pipe i have laying around?

 

[86bluecobra]

cut cats out and have straight pieces of pipe welded in. or go and buy a new high flow catted h or x-pipe.