Spoke to the garage the part I need is the IRD .... they didn't say anything about the VCU
A worn VCU will have killed the IRD, so you will need both. Also with a Fleaby, remember that they are only 4 wheel drive, if and when the front wheels slip, so makes no difference in terms of towing - unless your'e on a slippery surface of course, then you are at a disadvantage - hope this make sense!