Sound deadening while transmission is out??

[robwcormack]

I have a 2018 GT with the MT82 transmission that I just bought. It has 107k miles and there’s no record of the clutch ever being replaced and it seems to have a bit of chatter and noise that almost sounds like the heat vents blowing when driving. Because of this, I’ve ordered an RST clutch kit, new master cylinder, slave cylinder/throw out bearing, rear main seal while the tranny is out, clutch line, new bolts, fluids, etc. My question is, has anyone put sound deadening butyl mat like dynomat or something on the underside of the tunnel while the tranny is out to try and eliminate some of the noise these things are known for. I’ve read of people taking the seats and carpet out and putting it in that way, but if the transmission is already getting dropped it would be easy to just slap some in there from the bottom.

Sponsored

 

[robvas]

There should already be some heat insulation in there

Do you want to remove that or add to it?

 

[ORRadtech]

I would think that any of the adhesive applied mats would eventually unstick and fall when exposed to the heat and elements on an exterior surface. Perhaps there's a sound deadening spray of some sort, idk.

 

[Joe Gonsalves]

Anything you add will trap moisture, whether it's sound deadening material or some rubberized spray on coating. That trapped moisture will eventually lead to rust. Of course you won't see it cause it's covered in whatever you used. Sound deadening material should be used inside the car.

 

[SheepDog]

I did this in my 2017, but not under the car. Instead, removed all of the trunk liners, and the back seat and covered basically all the sheet metal from the back seat rearward. Definitely made a difference. Most of the noise you hear in the car is from the exhaust, and the rear tires. These were during the process, but ended up removing the plastic trim next to the rear seats as well to cover the wheel arches too.

 

[robwcormack]

I did this in my 2017, but not under the car. Instead, removed all of the trunk liners, and the back seat and covered basically all the sheet metal from the back seat rearward. Definitely made a difference. Most of the noise you hear in the car is from the exhaust, and the rear tires. These were during the process, but ended up removing the plastic trim next to the rear seats as well to cover the wheel arches too.

That looks like a good way to go. Might pull the seats console and carpet and do the whole thing

 

[Blufc3s]

Did this a few years ago to my 15, still good.

Sponsored