Rob I have used the part no. of the box you put up and done some checking and found a foreign supplier with one for sale which they list the engine code for and checking back with the info Harvey put up an engine code of D5244T4 and an M66awd gives the result of 4.00:1 final drive.....I hope that's right and answers your question, anyone else able the verify that ???
https://www.google.co.uk/url?sa=t&rc...ZvB9AC7oCcCDdA
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