hii there iv change the oil in the front and rear diffs on my p38 got oil to do the transfer box as well but is the gear box and transfer box the same thing ?

p.s had to make new profile as i could not login iv got post on here as gareth 38 cheers

No, gearbox and transfer box are completely separate and have their own fluid fillers (both need Dexron3 ATF). Transfer case is the easy one, there's a drain plug and a level fill plug, drop the old fluid out and pour the new stuff in until it dribbles out of the filler plug. Gearbox isn't quite as straightforward, especially if you have the later one with no dipstick.

cool i did not think they are can find gear box plug but not transfer box

Although quite why they tell you to disconnect the battery I have absolutely no idea......

cheers il have look under it tomorrow