Evening all, I'm new to this site and hope to get some help. Got a 54 Disco wich is remapped. Not long fitted a 2nd hand gear box and transfer box with diff lock. There was quite a lot of play on the fly wheel but didn't change it! Every thing is working fine except when accelerate hard up the gears I get a rattle/knocking at about 1800rpm in 2nd gear! It goes as quick as it comes and only in 2nd. Sounds like exhaust hitting chassis but no, not that simple! Checked all things like mountings etc but all good. Then today had a 3ton wood chipper behind and noise appears in 1st as well!!! Any ideas?