Lost power on motorway, clutch/gearbox problem? Help wanted

Hi guys, I lost power last week on the motorway, heard a noise followed by slight clunking so I applied the clutch, went onto the hard shoulder and got towed back to Nottingham where my student digs are.
Pushing it back onto the drive with ignition off and in neutral on both sticks it still made a clunking noise as it was moving, it only doesn't when the clutch is applied. I've checked the props and they're fine, so I'm guessing its a clutch/transfer/gearbox problem, I don't seem to be able to get it back into high ratio, and if I try driving it in diff lock it will move juddery but still clunks.

It's a 1988 2.5TD 110 with a LT77 gearbox.

Just wondering if any of you guys would have an idea what would be the problem and better yet if you knew any independant people around the Nottingham area who would tow and repair the vehicle, I want to get it back onto the road asap, it's like staring at an ill loved one whenever I leave the house

cheers,
Monty

It sounds like something to do with the clutch, possibly the clutch cover, BUT it could be the gearbox. You are almost certainly going to need to drop the gearbox so I would get it stripped and have a look at your clutch.

However, if you can ascertain that it is defiantly the clutch, I would remove the engine in your vehicle, it’s MUCH easier to do, I had a 4 post lift and I still would prefer to take the engine out than drop the box.

If you do take the engine out and it turns out to be the gearbox well at least you can get at it from another angle.