Hi, back again, I'm afraid.
I tightened the handbrake as per RAVE but I'm not convinced that it is working properly. If I pull the lever up to the second click, which is as far as it now goes, then it holds the car. But if I am driving along and I pull up the handbrake then the car doesn't really slow down very much. Probably about the same slowing down as when I lift off the throttle, when travelling at about 10 mph. The car will eventually stop, but the performance isn't especially good, from what I can see.
I took a couple of pictures of the rear of the transfer case, which shows oil around the bottom of the case. This oil is also on the handbrake drum but I don't know if oil has got into the drum without stripping it.
I did try holding on the handbrake while travelling but it hasn't made any difference, so I am not sure if there actually is oil inside the drum. I couldn't smell overheated oil, anyway.
So, how difficult is it to change the seal, or gasket, at the back of the transfer case ? Does the gearbox need to be taken out to do it ?