Gearbox or Transmission Oil - The Unofficial BMW M5 Messageboard (m5board.com)

ilovemy_e34 · 1st July 2007, 08:16

Currently I have Redline MTL in my transmission, but it is loud and rattles.

Can I use thicker oil? I live in southern California and I have not seen it really does not get below 50 degrees F here -- so I am not worried about hard shifts in the morning.

I have heard that I should use a non-detergent oil in the transmission like SAE 80 Castrol EP -- has anyone tried this oil?

The transmission has about 110000 miles on it.
Thanks!

bimmerm5 · 3rd July 2007, 09:18

Hi Cory,

For your transmission you should use ONLY DEXRON II ATF (automatic transmission fluid) and for your rear differential use only standard GL-5 hypoid type gear oil, SAE 90

JorNor · 17th July 2007, 08:51

Quote:

Originally Posted by bimmerm5

Hi Cory,

For your transmission you should use ONLY DEXRON II ATF (automatic transmission fluid) and for your gearbox try to use only standard GL-5 hypoid type gear oil, SAE 90

Transmission\Gearbox fluid? theres just one fluid in the gearbox right?
supposed to be DEXRON II ATF, thats all? didn't understand..

davidoli · 17th July 2007, 09:19

Quote:

Originally Posted by JorNor

Transmission\Gearbox fluid? theres just one fluid in the gearbox right?
supposed to be DEXRON II ATF, thats all? didn't understand..

The gearbox itself would run on the ATF .

The Final drive i.e. rear axle / diff on the hypoid gear oil .

The M5 Owners Handbook that comes with the vehicle clearly shows all filling capacities .

1.25 litres / 2.2 pints for the gearbox .

1.9 litres / 3.3 pints for the rear axle .

JorNor · 18th July 2007, 04:48

Wich of the Transmax Z or the ATF TQ DIII would be best for the gearbox?
I got the orange label..

AlexA · 18th July 2007, 11:34

I hear Redline D4 has been used with good results (in all climates). I use Redline MTL myself, but it can be a little thick on cold mornings.