Started off by stripping and cleaning all the gearbox, man its hard work without any sort of pressure washer etc but I got there in the end.
Removed diff casing and then the diff, stripped the diff and rebuilt using new hardened pin, new bevel gears, new fibre washers, new thrusts. Fitted 3.1 Crown Wheel and finished that. Next it was to strip and check the speedo drive, stripped that and checked, used guessworks site to work out if it needed changing. it does need changing, but its not that far out, so for cost its staying. speedo will over read by 1 or 2mph according to guessworks site, which is better than under reading.
Changed the pinion, but had to also change the 4 bolt (c shaped thing) behind it as it was too close a fit with the new pinion. Sourced a bigger one and its all fitted and done.
Rebuilt the gearbox, fitted diff, fitted casing, fitted new seals (linkage n shafts) and gave it a coat of black paint.
Went back to engine and did some work on that, fitted oil pump and such. Checked cam and refitted with some engine lube for next start up (just for good measure).
Fitted block to gearbox and painted the clutch transfer gear housing.
So crack on tomorrow with building it back up and painting the engine.
Jordie
Pics
1) Old crown wheel, gears, washers and diff pin

2) engine and block together (still need to clean engine and paint)

Sorry no inbetween pics due to been busy and oily hands. I need an assistant to take photos lol.