Posted over on JK forum too to get other insight as well. Whats your all thoughts on this?
Long story short, my dad was going to trade in his low miles 07 rubi (21,000) for a 12 because it started squealing under load at mid throttle and 3 dealers couldnt find the cause. He offered it cheap to me, lower than the dealer was going to give him. They thought it was like a throw out bearing, or clutch disc problem. Only happened under 1/2 throttle right around 1500-2000rpm, most noticeable in 4th gear or higher. When the noise occurred, if you rapidly depressed the throttle or let off of it the noise would go away instantly. Clutch never slipped or seemed to have any problems.
Fast forward to today after using my Chassis ears which are remote transmitters that you connect clamps to places you think make noise and you can track down the problem. I think a must for every Jeep owner! hahaha. Anyways, I started with the running grear, trans, bell housing, transfer case and nothing..........Kinda sounded like a intake suction noise in a way....So I threw all 6 sensor clamps on the plastic intake and BOOM found my noise in the intake tract. Now what? Why is whistling/squealing all the sudden, small vacuum leak? I did a BG throttle body cleaning and still the noise......Jeep has a AEM intake but my Dad said it starting making the noise somewhat before the install.
Anybody make an all aluminum intake? Maybe throw one of those tornado spirals in the intake tube?