Hey everyone! Ive got a weird noise I thought I would run by you guys since my searches have turned up nothing. So this weekend after replacing my cracked exhaust manifold I started getting a metallic rubbing/scraping noise at 2,000rpm only when in drive, the noise continues to get louder past 2,000 rpm. There is no sign of it in any other gear except drive which has made tracking down the source somewhat difficult. Speed and the gear its in has no effect on the noise and if you put it in neutral while rolling the noise is gone. Ive crawled under it ( in park of course) and poked and pulled on everything and re torqued the manifold bolts nothing appears to be lose.
A little info on my Jeep...
1993 Jeep ZJ Laredo 4wd
4.0l with AW4 auto and 181,600 miles
NP 231 transfer case
Regular oil changes, fluid changes and greasing