I have a 95 yj lifted with 32" tires. Recently started a very loud popping sound when accelerating in all gears. Does it in 2h and 4h, and also when I engage the clutch. It's intermittent and goes away. At this time 4h does not work but thinking that is a separate issue. Not sure exactly where to source the noise. But it seems major but goes away. Any help would be great. Thanks.