With both front and rear diffs completed it's time to assemble the gearboxes casings around them.  Front and rear gearboxes are, just like the differentials themselves, identical. 

The pinion gear is actually one half of the CVD coupling - a really simplified approach which should mean there's less to go wrong here.  The grub screw that holds the CVD is mischeviously already hidden inside the part it's destined for - and so it caused some moments of panic when it wasn't in this stage's screw bag.  The pinion rides on two large ball races which side over from either end - the rear one effectively captures the CVD pin ensuring reliability - it simply can't fall apart! A nice touch as I've had problems in this area before on an 8th buggy.
The whole assembly threads through the gearbox and is secured in place by three screws which just overlap the bearing.

And whilst were on the subject - although it isn't mentioned in the manual, a quick check of the official Xray forum shows a 'tip' suggesting the removal of the rubber seal on the bearing facing into the gearbox - since in some extreme cases this seal has dislodged and caused problems. I'm told this was only a problem on early cars but I wasn't sure which catagory my car was in so I removed the seal anyway.

The centre shafts push through from the inside of the gearboxes and secure with three short screws	Removing the inner dust shield is a tip from the Xray website.

The gearbox is exposed from below - allowing the differential itself to sit as low as possible - it actually sits down into a recess in the chassis and once screwed down should be properly sealed from the elements.

The diffs drop in without any problems - resting on the moulded bearing sleeves.  The two halves of the gearboxes have a tongue and groove that interlocks and effectively stops dust working its way into the gearboxes.  A couple of screws lock the gearbox together, followed by additional screws in the shock towers.