Wurring Sound from Gearbox

Mark,
Have you checked the oil level?
Could be low oil...or... Worn front/rear bearings, chipped or worn gears, excessive layshaft end float... all require the box to be overhauled. 4wd Systems in Adelaide qoute Cruiser gearboxes at $3499 outright or $1499 change over, or overhaul kits for between $500-700 depending on exact box model. Check out there web side for more info.
Mick.

If it make the noise in neutral with the clutch out and then goes with the clutch in it could be your thrust bearing and if thats the case it shouldnt cost that much. Ive got the same thing with my triton and after having a full clutch kit put in it still makes the same noise wombats tritons have the same noise.
Guy

This wirring noise is common in the 1986-1990 75 series troopies and utes. All of mine made that noise a bit. It always started when the engine and box was cold and got better when they warmed up. My vehicles all did it and had under 100,000 kms on the clock. It seemed to get better after they warmed up and eventually it stopped. I live in a fairly cold area in Victoria and I have noticed that during winter a lot of the cruisers around here do it. I always thought that it was oil viscosity problems when it was cold. I never did anything about it and I never had a gearbox failure. No one I know has ever had a gearbox failure around here that I have heard about and most families, farmers and businesses have a landcruiser of some kind.

Your car has done a lot of miles. My box in my 1986 factory Turbo blew the main shaft at 300,000 after many years of towing a heavy fibreglass ski boat. The new box was expensive to rebuild (3400 with clutch and transfer case). If your box is the original it would probably need doing, if it has been done and has less than 250,000 kms, I would not expect that the box needs a major rebuild.