30,000 miles and you're worried about differential, transmission fluid etc? Sounds like money wasted for absolutely no reason. Go feed some poor people it's better for you.

 

Hello all,

So I recently replaced the oil in my 04 545 gearbox with some Redline D4ATF oil. I have good reason to believe that this was the first gearbox oil change in its 80k life.

Since the oil change, it now seems that the the gearbox is somewhat louder than before. I am not sure if it has to do with viscosity...?

Is there a recommended additive that I can put in to quiet it down a bit... versus removing the brand new oil and putting in something else?

Thanks!