hi, got my eye on an '04' td5 110 csw and was wondering if anyone can tell me what rear diff it should have. my 110 300tdi csw (98) has a salisbury diff and i was expecting to see the same on the td5 but it looks just like the one i had on my 300tdi 90. would appreciate any information. would also like any tips on what to look for before i waste my hard earned cash!!.