ls2 bait

iTrader: (11)

what would make it do that? its like whistling dixie. notice it most in 4th and 5th gear.

Magnet

iTrader: (36)

uh oh...

ATLSS

iTrader: (7)

I wonder if 9 second ETs made it do that.

I hope it's nothing serious man... I'm subscribing to find out the cause in case I have the same issue after my trip to track in a couple of weeks...

ls2 bait

iTrader: (11)

ttt??

85MikeTPI

iTrader: (9)

Is the trans still stock? If it whines in 4th and 5th, and not in any other gear, it's odd since almost nothing is unique to 4&5.

Probably won't know for sure until you tear into it, so anything you get here will be pure speculation.

ls2 bait

iTrader: (11)

no it whines in all gears just more audible then.

thesource

iTrader: (60)

If its whining in 4th gear , you might be hearing the diff instead .

BlackScreaminMachine

iTrader: (17)

Try it on a lift, disconnect the DS and put something to try to keep the fluid in and try that. Should eliminate Diff noise.

Sounds like a Pilot bearing or a beaing on the inside of the case.

thesource

iTrader: (60)

Its not the pilot bearing . That makes noise in between shifts . If its a bearing , which I doubt , it would have to be the output shaft bearing , once again which I doubt .

I would double verify that it is making noise in 4th gear .

ls2 bait

iTrader: (11)

its all gears. its not the diff. its def the tranny. it squels between shifts too.

02NBMWS6

iTrader: (22)

you have a built trans right? Is it a Viper shaft conversion? My Viper shafted tranny whines a little bit too after being "broken in" in two cars over the last couple years

ls2 bait

iTrader: (11)

i did all the small parts but i didnt do the viper shaft.....although im going to need to.

PewterScreaminMach

iTrader: (7)

How are you so sure it's the transmission? I would second that it's most likely your rear. The noise transfer almost always makes it sound like the rear whine is coming from the transmission. Mine is EXACTLY the same way. Stick anyone in my car who doesn't know about the whine you experience from these rears and they'd probably insist that my transmission is about the explode. It did it ever since I got the rear on the stock trans, with the new transmission, and still does it exactly the same after I just rebuilt my MN12 transmission about two weeks ago.

It also only does it at certain speeds and in certain gears. It's much louder cruising in fifth at XX mph than in, say, second or third cruising at XX mph. It's all about harmonics.

All that said, I am curious as to how you know it's coming from the trans.

ls2 bait

iTrader: (11)

because my rear whines too and i can hear that as well plus my rear doesnt whine each time i shift.

thesource

iTrader: (60)

So is the noise when you shift or during the time its in that gear ?

ls2 bait

iTrader: (11)

both. it whistles kinda between shifts and whines while in gear.

85MikeTPI

iTrader: (9)

Could be the input shaft bearing, or the countershaft bearings, starting to go bad. Do you know what shim specs were done during your last rebuild?

Are you planning on dropping/opening the trans, or going to run it until it breaks?

slayerized6

iTrader: (12)

my tranny makes odd sounds when im in 5th and 6th gear. i just consider it normal now

ls2 bait

iTrader: (11)

at this point ill likely run it til it breaks. i have no reason otherwise to pull it right now. i dont know the shim specs no. im pretty sure we just used what was in it.