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Originally Posted by desertman123
I've seen people mention 75w90 and 75w140 for the diff, does it really matter which? I might switch to a heavier diff oil since I'm in Florida (it's still in the 80s here, almost December, god I love having summer tires all year round!). Might have to get in contact with Redline to see what they recommend.
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Well... BMW says one should use Castrol SAF-XJ 75w140 diff oil in the 135i(and also in M model cars). So that is why I run a 75w140 viscosity diff oil.
Quote:
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Also I've noticed the trans is a bit harder to shift on cold mornings (it's gotten to the 40s at night here) but nothing too bad. I try and take it easy until the tires/fluids are nice and warm.
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Since June I have been running
Redline's MTL in my six speed manual trans. I really like it. I had been using
Redline's ATF D4 forever.
A lot of guys on this forum (including
MightyMouseTech )talked me into using
MTL and for the most part I am happy with it. But this week its getting kind of cold in Germany... (bellow freezing, highs of only 3'C and lows of -9'C at night)... and I have noticed that the first three or four shifts(in the first kilometer of driving) are kind of hard to go into gear. Its possible, but it takes some force to move the shifter into position. IF you have to do a lot of shifting when you first drive away from your haus MTL might not be for you.
I think IF you live in a cold climate and park your car outside... I would use
Redline ATF D4 or even
D6(since its thinner than D4). I usually don't drive my 135i in the winter(my e39 540i is down at the moment)... but soon it will go to sleep for the winter months. Maybe in the Spring I might switch back to
ATF D4 since I have a gallon of that fluid in my garage.
Dack