I just bought a 2001 wrangler sport its lifted with big tires. And i notice when i drive there a rought sound under the car when I step on the gas. when i step on the gas I hear the sound. then when i go to neutral and the car is still rolling i dont hear the rought sound then i go back to gear and the sound is back. The clutch sounds and fell like it goes in good i have no problem with that. I changed that engine oil and put coolant. I checked the brake and steering fluild and it looks fine.I didnt check the transmission fluild yet. I ask a couple of people and they all tell me its the big tires making that sound. i dont think its the tires. do anybody know what can it be.