2 or 3 leg puller(biggish one tho) get it all tight, tap with a hammer, and hey presto. Maybe a day or two soaking in wd40 or similar tho first.
Its odd how people get the completely opposing image about a shop tho. Ive had dealings with LA Supertrux twice, first time owner hung back on saturday waiting for me, then showed me round workshop(and MONSTER TRUCK) had a brew, and was a thoroughly nice bloke, seconde time went OK, parts arrived ,no problems. I have heard that Calamini are pretty crap in their distribution of parts tho. Specialist leisure have given me the 'its on its way from the states ' promise before, and I really do believe that Calamini dont exactly rush to get them parts across to the UK.
As mentioned, breather covers pop off dead easy(mole wrench does trick well) AND hose pipe fits nicely onto the spigot to make up axle breathers.......
Transfer case breather is a smaller diameter tho, dont forget that, and the gearbox want to breath fresh air eh?????