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Not sure if you have seen the other post, so i thought i'd post again for you, hope you enjoy doing it, it was a pain. 
I finally got around to fitting the gearbox and transfer case breathers and what a pain they were, they are not the 1/8 BSP threaded ones like on the differentials, they are presses in place, the manual gearbox one isn't to much of a problem as it can be taken out with the 4 bolts that hold in the gearstick, then you punch out the breather from the other side.
Then tap it out to 1/4BSP
You can then fit you pipe fitting
Refit as normal, to do the transfer case is a little different as you have to get the old breather out and you can't get to the back, what i did was to pull the cap off and tap out the bottom piece to M6 and insert a bolt and crow bar it out (slide hammer would be better if you have one) Then tap the hole out to 1/4BSP but put plenty of grease around the tap and keep removing and cleaning it, this will stop all the aluminum bits falling into the transfer case.
had to use a spanner as the tap wrench wouldn't fit
Fit your pipes and run up to the engine bay
Two pipes for the deferentials, one for the gearbox and the other is for the transfer case, i've just used the two vents/exhausts to keep it neat.
The one on the left is off the differential and the right is from the gearbox/transfer case
I finally got around to fitting the gearbox and transfer case breathers and what a pain they were, they are not the 1/8 BSP threaded ones like on the differentials, they are presses in place, the manual gearbox one isn't to much of a problem as it can be taken out with the 4 bolts that hold in the gearstick, then you punch out the breather from the other side.
Then tap it out to 1/4BSP
You can then fit you pipe fitting
Refit as normal, to do the transfer case is a little different as you have to get the old breather out and you can't get to the back, what i did was to pull the cap off and tap out the bottom piece to M6 and insert a bolt and crow bar it out (slide hammer would be better if you have one) Then tap the hole out to 1/4BSP but put plenty of grease around the tap and keep removing and cleaning it, this will stop all the aluminum bits falling into the transfer case.
had to use a spanner as the tap wrench wouldn't fit
Fit your pipes and run up to the engine bay
Two pipes for the deferentials, one for the gearbox and the other is for the transfer case, i've just used the two vents/exhausts to keep it neat.
The one on the left is off the differential and the right is from the gearbox/transfer case
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