300Tdi Issues - Drain plug missing? Fluid leaks

Hi, I've had my 90 for a while - its got a galv chassis - however I'm looking further underneath it etc & it's looking a bit strange.

There seem to be a lot fluids underneath & quite a bit of surface rust on the front suspension/brakes.

The most worrying thing for me though is when looking underneath I saw there was just a hole into the gearbox (or is it the transfer box) - at the lowest place which looks like there should be a drain plug there?!





Those are the photos of it - should there be something in there?! and if there should - does that mean there will be no fluid in there?

I've got a few other problems like a lot of fluid underneath - it looks like its coming from the prop shaft (diff maybe) - & from the sump seal - heres the photos:








Finally, heres my final (on this occasion) worry - the front suspension looks quite rusty, and the ball joints look like the seals are perished - can these be replaced? Here's the photos:






Any help or advice on these issues would be great!

I've got a few more questions to be coming on the wiring side of things - but I'll have a separate thread for that I think!

Thanks,

Max

pic 1 is the bell housing and the hole is for the wading plug. so no there isnt anything missing from pic 1. The oil crank seal is leaking by the looks of it thats were the oil is coming from (pic 1)pic 3 looks like u might have an axel breather blocked or rear diff ool seal that needs replacing

While it leaks its ok,problems start when the oil stops coming out.