hi guys i have engine oil leaking from my gearbox the underneath sid of the box and ideas cheers

 

Rear crankshaft seal, or maybe simple like sump gasket.
Can't imagine that it is the crank case joint?
has the engine been given any work recently?
Check all joints, rocker covers too.
There is an oil feed to the turbo, a pipe with a banjo connection, real awkward to get at, might be loose?
Buy Jap Performance Magazine and check for a specialist near you. Stacks of ads there.
911

 

Yep agree with 911, rear crank seal.

I can change it at your house if you want

Rob

 

how much cheers