: Transmission noise question



DoubleK81
03-31-12, 12:47 PM
I've noticed a somewhat troubling noise in the transmission area of my recently purchased V.

Background on the car- 06, 81k miles. Stock with Borla catback, CAGS deleted/removed.

Sound is most prevalent in 1st-3rd gears, no where near as noticeable in 4-6. Nearly silent on the beginning of a cold drive, but at its worst within 15 miles ( after trans has warmed up to normal operating temp ). Sound is not apparent when when cruising under light load or decel. 1/4-1/2 throttle is when I have noticed it most.

As far as the sound goes, the best way I could describe it would be a couple of marbles being bounced around in a box and grinding, but muffled ( if that makes any sense). Sound comes from directly around/under the shifter area. If I let the car coast out of gear, its dead silent, whether the clutch is in or out. I did not seem to notice any difference when the shifter was left in gear or not when pressing the clutch. Car shifts without issue. Clutch pedal is very light ( coming from an 03 Cobra, and my Camaro with a Monster Stg3& Tick master, so my perception of effort may be skewed), engagement begins 1/4-1/3 from the floor.


Has anyone ever had this issue or any ideas? The only thing that is popping in my head would be the input shaft on the trans, but I have not seen any issues with them on the forums. I'd like to have an idea of what it is so I can point the dealership in the right direction, I like this car so much I dont want to be without it longer than absolutely necessary :)

darkman
03-31-12, 09:24 PM
http://www.cadillacforums.com/forums/2004-2007-cadillac-cts-v-performance/248960-noise-tranny-competition-mode-gone.html#post2820333

DoubleK81
04-01-12, 12:16 AM
Thanks for the link darkman, you seem to have everything in your cabinet. No lift or jackstands here at the house so I can't quite get all the way through the check steps, so hopefully they just get it figured out when I take it in.

darkman
04-01-12, 09:02 AM
Diagnosing sounds on the internet is always a crapshoot but, I really do not recall any similar reports on this forum.

rand49er
04-01-12, 01:59 PM
How loud is it?

I mean, is it one those noises where you have to turn everything off and really turn up your hearing aid to hear? Or, is right-in-your-face loud?

DoubleK81
04-01-12, 08:38 PM
I can hear it when the AC is running at full blast. It doesnt overpower it, but i can hear and feel it. If I turn the air/radio down, you hear it over anything else. I know theres going to be SOME noise, but this being my 5th ( and many more that i've driven ) T-56 equipped car, this definitely isnt a normal noise.

darkman
04-01-12, 09:12 PM
I can hear it when the AC is running at full blast. It doesnt overpower it, but i can hear and feel it. If I turn the air/radio down, you hear it over anything else. I know theres going to be SOME noise, but this being my 5th ( and many more that i've driven ) T-56 equipped car, this definitely isnt a normal noise.

This T-56 is actually quieter than some others due to the heavy, spring-load dual mass flywheel. In fact, that same dual-mass flywheel is also a candidate for failure on high-mileage Vs and can make noise on the way out.

Cadillac Cust Svc
04-02-12, 01:52 PM
Sorry to hear about your frustrations, DoubleK81! I'm glad you're taking your V to the dealer for a fix, and please feel free to email me anytime at Katie_Lucille@gmexpert.com if you have lingering questions. While I'm not a technician, I'm always happy to help where I can and research on your behalf.

Best,

Katie
Cadillac Customer Service

DoubleK81
04-13-12, 06:44 PM
Well, after a trip to the dealership, they said it was the exhaust rubbing ( on what, I don't know ). They adjusted the exhaust, and i'm guessing they didn't even bother to drive it because the exact same noise is there. Drove it home, and have given myself a couple of days to cool off because for some reason this ( not the noise, the lack of accurate diagnosis ) really irritates me. Will be setting another appointment to drop it off tomorrow morning.

Along with this, i've had them replace the harmonic balancer, and tensioner because of throwing/exploding belts. I'm beginning to feel a little jipped lol

rand49er
04-14-12, 11:19 AM
Well, after a trip to the dealership, they said it was the exhaust rubbing ( on what, I don't know ). They adjusted the exhaust, and i'm guessing they didn't even bother to drive it because the exact same noise is there. ...:canttalk: