good cars i have a 93, apparantly without LSD so maybe not all em come with it??
you could search for" Profile gasket "
this was a common failure.
but due to the cars age maybe it's been replaced.
Trailing arms in the rear, the bushes can get worn & rip out of the floor $$$
but being a 318 it probably hasn't been Torque abused, like a 325/28 might have been