Have removed propshaft and crown wheel . Up graded wheels from 15 Inch to 17 inch ones . Lad used vehicle other day I went to move it yesterday can't select any gears . Jacked it up if you spin PASSENGER side wheel spins driver side wheel .

Sounds like a gearbox problem. I'm assuming it's an auto, even though it says manual in the in the title. The KV6 was only available as an auto from the factory. I've seen a couple of IRD input splines fail, where the box feeds drive to the IRD. This would give you no drive to the IRD, but leave the wheels connected to each other. Alternatively the splined link tube to the LH drive shaft can strip. This normally cuts the drive to the LH drive shaft, which is easy spotted. You seem to have drive across the front, suggesting the IRD input splines have failed.