E34 (1989 - 1995)
Car model as I stated is:E34 525i M50
Year:1991 September
It has ZF 310Z gearbox.
My gearbox fluid level might be low because of output shaft leak.
Thats a problem I will soon take care of.
The big question is what kind of transmission oil do I fill in.
I will leak out the old oil I know...