dannieboiz

Does anyone have road noise problem with their GS4? I feel like the road noise is more than expected.

RRocket

It's not any more noise than a "normal" car, but since the car is overall so quiet, you tend to hear everything. The culprit is likely tires, since most low profile tires aren't made with quiet in mind. I do hear the new Pirelli P Zero Nero as VERY quiet...........

Otherwise, put in some sound deadener in the floors...

dannieboiz

I actually have stock 16's on @ the moment.

marcus

I have a 1st gen gs300 and a 98 gs400. the 1st gen is definitely quieter on the road than the 2nd gen. I have one slightly out-of-round 18" wheel than makes a bit of road noise. I have had this wheel on both cars, in the same position, and the noise inside is definitely louder on the 98.

I agree that the answer will be sound-deadening insulation.

e-man

I don't know if this is causing your problem, but check the moonroof drainage tubes. Yes, the moonroof drainage tubes. I wrote up a solution to the problem a few months ago and will try to find it. Also, check to make sure that you still have your undercarriage plugs. There are about 6 of them, but the two just behind the front wheels are usually the culprit (more for wind noise than for road noise). Anyway, here's the thread on the moonroof drainage tubes:

https://www.clublexus.com/forums/sho...394#post895394

bitkahuna

iTrader: (20)

How much wear on your tires? That's a huge factor. Plus as has been said, the drivetrain is so quiet that road noise is more noticeable.

dannieboiz

I don't know how much of that statement I'll take up on. I was driving an 98 LS400 and did not notice the same road noise that I get from the GS4.

And to answer your question the tires are virtually brand new. Still showing the small rubber spikes.

bitkahuna

iTrader: (20)

If you want LS400 quiet, get an LS400. Comparing the GS to the LS doesn't mean much. The LS has the most sound deadening material in it.

If you want to keep the GS you could consider using Dynamat (or cheaper B-Quiet's Brown Bread) under all the carpet and in the doors - that will definitely make it quieter.

dannieboiz

It just suprises me the kind of noise I get out of a what's supposed to be a Semi Luxury vehicle. My 02 Tahoe was much more quiet than this with 20" rims. I'll try doing the dynamat route when I tear out everything to do my system.

doug_999

The GS is not a quiet car. As pointed out, the sunroof draintubes need to be checked - they are right behind the rear wheels and I'll bet they are sticking out. The quickest way to check is to close your sunroof while driving and see if the car gets quieter, if it does, you have the draintube issue. However, even then, the car is noisy IMHO.

LS4fun

Ear Plugs?

e-man

I have to agree with the other comments as well. The bottom line is that the GS is not quiet, either the 300 or the 400. I have a 98 GS400 with 17 inch rims. My car went in for service, and I was given a 2002 GS300 loaner car with 16 inch rims. I expected the difference to be night and day. You know what? Just as, if not more, noisy and many, many more rattles. Lifting the sunroof drain tubes will quiet some of the noise, especially if you hear it coming from the rear seat area. Also, like I said, check your undercarriage rubber plugs to make sure they haven't fallen out. On a scale from 1-10 (10 being the loudest, 1 being the quietest), my car went from a 8 to a 5 when I replaced the undercarriage plugs and then from a 5 to a 4 when I lifted and secured the sunroof drain tubes. What tires are you running on the 16 inch rims? There are tires that are specifically made to run quieter. Hope this helps.

e-man

Cali_GS300

I have XTREME Dynamat thoughout my whole car. After sound dampening, the car became so quiet that we could talk at low volumes and still hear each other. Now I notice little things like wind noise behind my ear on the freeway or slight wind noise in the sunroof. It's probably been there the whole time but masked by some other noise.

This is probably the case in your GS. You've probably goten used to the nice ride and quiet sound now you're picking up other noises?

Cali_GS300

How do you do that?

e-man

Do what? Lifting the sunroof drainage tubes? Check out this thread:

https://www.clublexus.com/forums/sho...5394#post895394