Hi John,
It really depends on the condition of the box and how often it has had oil
changes.
You might get oily lumps of gunk that aren't too much of an issue
espescially since you are changing the oil, however if you start finding
lumps of metal in there, then panic!
Also from memory I think there are a couple of magnets actually in the pan -
these will also need to be checked and cleaned.
It reminds me of when I changed the gearbox oil of my first car, a Triumph
Spitfire - I knew the synchro was a bit chunky but when I changed the oil
the magnet in the drain plug had two ball bearings and a lot of iron filings
stuck to it.
Needless to say, being a poor student at the time (doing Agricultural
Engineering) I just shoved in some thicker oil probably from one of the
drums in the college workshop and the gearbox was fine for then next 18
months before selling it!
--
Regards,
Julian Voelcker
Mobile: 07971 540362
Skype: julianvoelcker
Cirencester, United Kingdom
1994 HDJ80, 2.5" OME Lift