hi im new to this forum and dont know where to start really, ive had my freelander 2.0 d for 3 years and all fine until about a mounth ago going down the motorway the transfer box went bang i got the car back home and changed the trasfer box and after reading many threads on here i also changed the viscous coupling and diff mounts but that was only the start of my problems 1 week later the diff was making a noise so i had the diff rebuilt with top make bearings but taking it for a run the diff got red hot and there is a knocking noise coming from the viscous coupling area so bought a second hand diff fitted and still have the same fault please help is there something i need to line up im at my witts end with the pile of sh*t