Chirp Fron Trans Or Intake?

[Vtolds]

I have a 2000 with the 2.4 with a automatic when I shift it manually for speed when I go from 1st to 2nd I hear a chirp sound almost like a turbo at first I just figured it was my wai intake but it is in the back of my mind that it is my trans. Does anyone else have this sound while doing aggressive shifting in a automatic?

[alerosport.com]

the civic cold ari intakes on the v6's will whistle/chirp around 2k or 3k rpm

[Vtolds]

I'am talking a pretty load chirp sound at about 6500 rpms right when I shift from 1st to 2nd otherwise my intake does kinda whistle when I just tap on the gas a bit.

[bigd6983]

vtolds.....i hear it every couple months.......under relly hard accelerating when i let off the throttle and shift to second.......sounds kinda like a belt screeching.........

[FormulaNERD]

it's the belt, mine used to do this, but only near redline shift. changed the belt and it doenst anymore.

[Vtolds]

A belt in the trans or on the engine? I only have 1 serpentine belt if that belt was slipping I think it would be way worse than a chirp sound plus iam pretty sure it is coming from the drivers side.

[FormulaNERD]

i'm not sure... mine would just bark real quick (the engine serpentine belt) at high rpm. like when floored shifting from 1 to 2.

[Vtolds]

its always possible my ears are off but the belt doesnt seem loose in any way uselly you hear the belt slap but maby at such a high rpm it skips when the rpms go from so fast to dropping 3000 or so rpms. any idea is there should be some tell tial slack in the belt? and does anyone how much slask the belt should have?

[FormulaNERD]

well it's not the slack in the belt, unless the tensioner is bad, but i doubt it. i guess the back of the belt gets really smooth over time, and can slip under stress. like i said, i wasnt sure why it was doing it, and i thought maybe the belt was loose, but after a new belt it doesnt do it anymore.

[Vtolds]

its a pretty new belt I can guess Iam the second owne I have had it for about a year and have put 11,000 miles on it and all the text is all still on the belt and was certified at the dealer so maby they changed the belt I have no idea.

[FormulaNERD]

well maybe it's not the belt, hard to tell since i cant hear it... if its more of a whistle its just the intake...

[Vtolds]

its a high pitched chirp almost like a turbo blow off valve thats why iam leaning towards my intake and I dont recall it doing it before I got my intake but I didn't really push my car before I got my intake so I have no idea. Anyone wanna sit on my engine while I drive 45 mph at 6500 rpms and switch from 1st to 2nd gear? :D

[FormulaNERD]

sounds like intake to me now that you explain it like that. mine does the same with WAI, and also did it with CAI

[FutureEcotecOwnerAgain]

Does it mess up your tranny if you have an automatic and shift it yourself manually? I like to do it, but i just dont want to mess up my tranny. but i love the deep aggressive exhaust sound when i down shift with my automatic.

[Vtolds]

I have no problems up shifting but when I down shift it is a bit clunky and doesnt really feel right kinda skips it is hard to explain. But otherwise I dont know how bad it is on the auto but eseentially all your doing is shifting when you want to instead of letting your computer do it at a certain rpms and speed.

[Vtolds]

SO formulanerd your intake basically makes the same chirp sound out of the intake as mine? All I really wanted know if that was normal but all of this talk has given me insight to other possibilties.

[FutureEcotecOwnerAgain]

thats what i figured. i mean if it was bad why wouldnt they of fixed it so we couldnt shift manually with an auto.

[FormulaNERD]

if it's a turbo like whistle, yes mine does it, and it is normal... just air going into the TB around the butterfly.

[Vtolds]

Well for some wier4d reason people like to tow with cars so they give you the choice I guess :rolleyes:

[Vtolds]

I wish I could get the sound on my comp but I dont have anyhting that can copy the sound and put it on my comp

[FormulaNERD]

maybe i'll put the sound online soon, and you can compare.

try opening the hood, and quickly giving it gas with the throttle cable on the TB. see if you can emulate the sound. and see if thats it.

[Vtolds]

The way you explain it is I should hear it when I hit the gas, I hear a little whistle when I tap the gas when I shift it is a big CHIRP !!! so I still dont think it is the same.

[FormulaNERD]

seriously sounds like the intake to me....

[bigd6983]

yea i have that same problem.....i hardly ever hear it.......its on a hard rev, usually manually shifting into 2nd and slightly letting off the gas to let it shift.......

i mean it could be the belt, but it just sounds it came from the tranny but im not sure......

the idler or tensioner pulley whatever it is on my 3400 looks like it flexes pretty good at idle......just kinda bounces with the belt ever so slightly.....maybe a 1/4-1/2 of movement.......is that normal?

[FormulaNERD]

that is the tensioner, not the idler, and yes a little movement is normal, but over time they can wear out, if it's 1/2 inch or more, i might look into getting a new one.

[1WhiteOSV]

it's the vacuum pump inside the tranny...I hear this a lot w/ my B&M shiftplus when it's in the "race" mode