Hey everyone alright so this is my first post but i need ur help i rescently bought a 1987 924s and ive done some work too it. everything runs great expect for one thing, when im in gear and let off the gas i get this very loud rattel between 2000rpms and 2900rpms its louder when im in gears 1-3 and not so much in 4 and 5 but even when i jst let out the clutch when im in netural i get a light rattle, has this happen to any of u? and if it has can u give me an idea of what it might be?

 

How about your exhaust system vibrating under the tunnel? Carrier bearing? Just things to check.