Transfer box won't fit

Just in middle of auto conversion on 300 tdi got the autobox in no problem,come to fit transfer box on it fits spline but is 5mm short of mating together to bolt up,examined the manual box spline and the shoulder is 5mm shorter than the autobox which has a bolt on the end which when undone the shaft comes out but doesn't come out on manual box,do I get the shoulder taken down on a lathe or is there any other way.atb Ed

Have you looked at the Ashcroft Engineering site?

I was on there yesterday, dreaming of converting my TD5 to Auto, as you do... and in their advice/kits section they has a shaft extension piece FTC 5090.
http://www.ashcroft-transmissions.co.uk/index.php?act=viewProd&productId=47

Now sorted there are locating dowels on both autobox & transfer case,took dowels off one side and it fits perfect now all in and bolted up only got props,kickdown cable & oil cooler & pipes to do now & it's good to go.