Hi everyone.
My X300 4.0 has lost drive, forward and reverse. I pulled away from junction with a bit of gusto and there was a funny sort of slipping belt noise and stopped moving. There are no warning lights on dash, have so far checked that the gear selector actually selects gears, both ends of cable are moving, reverse lights are working. The revs do change when selecting gear but nothing happens when try to drive away. Oil level is OK, oil is clean, no funny smells.
My question is, do I need a new gearbox? I'm OK with replacing it myself, just want to know if it's box or anything electrical.

Thanks
Tim