I'm pretty sure even the H145 diff has a threaded breather. I use the right angle outlet from a fuel pump, connect some clear plastic hose to it & either run it into a bottle in the boot, or usually make a large loop so any oil coming out under cornering will run back into the diff. I point the fuel fitting 'uphill', & make a loop which comes back to the fitting, then use a large cable tie to attach the hose to the fitting & close off the end, so only a little is lost if it gets to the end of the hose. I've seen some cars where the hose is run into the cabin, so you can smell if the diff get hot, but to me all you smell is diff oil, constantly.