maroonls1z

So i finally was able to get my 9" set up quiet(after pulling it about 4 times and changing from motive gears to yukon). but as i break it in, mostly with around town driving and short freeway stents(10-15 min never over 65), it seems to be getting louder. Its only slightly louder right now from when i got it back from the shop i had set it up, but ive only put about 100 miles so far. Could it be the oil just getting dirty from the break in and after i change it will it go back to quiet? any ideas?
moser 9" aluminum center section with yukon 3.50