Oh god, this is tempting fate!!:5bbanghead:
I'm on 201,650 miles, still got the original gearbox, has been well looked after (regular oil and filter changes, every 40,000 miles by me and previous owners) and still going strong. Never been refurbed or rebuilt (got confirmation of the work done and a comprehensive record of the service history from a good garage coroborated by the service history book, who did all the servicing prior to me getting it in October 2013).
If you get a build sheet for your Rangie from a Main Dealer, the record includes the Serial Number for the original gearbox fitted. If you look at the tag plate fitted to the gearbox (look at the gearbox under the vehicle on the passenger side and you'll see the tag plate) it'll have the serial number on it, so you can tell if you have the original box or a replacement.
Now I've tempted fate, think I'll just wait for the inevitable:rolly: