I don't have a manual unfortunately.
So you think then that the diff lock fuse will disable rear wheel drive ?
I did try putting a fuse in there and went for a drive around the block, the steering was heavier and there was less power similar to what it would be like if it was only 2wd, it also felt a bit strange going around corners.
I just can't understand though why they would call that fuse Diff Lock and not 4WD as they do other GT's ?