Been having a look round the 80 and so far I have found
The reason the brake warning light was on was low fluid topped it up and it went off, so went for drive and it was back on. So after further investigation I found a worn though pipe from the rear brake proportioning valve, and it looks a pig to change
I then dropped the diff oils after a major struggle with the filling plugs, a welder helped a lot here.
The front was pretty clean but the rear was disgusting with a few metal shards in the plug, but seen worse.
The gearbox and transfer box oil were not to bad but looked like it was overdue a change.
An other thing I have noticed is the front axel balls have a bit of pitting on them, will this be a problem ??
I could not find any chassis rot so far so pretty pleased with that
It goes for it's mot next Thursday so we will see what that turns up