[Spridgets] Datsun 5 speed tranny fluid?

[BJNoSHOV8]

You'll need to search for more specific recommendations for your vehicle 
model and year.  In the old days manual transmissions usually used 90W 
gear lube.  More recently I've noticed that a lot of manual 
transmissions have used a form of ATF.

If the rear main seal is leaking, you can probably sample the drip and 
figure out what it is.

> What fluid should I use?
> I put some in last year but I think the rear main seal went.. What fluid
> should I use?