Cold Weather Trans Flud (for DD use)
 

Although this is about my 944 I have had similar issues in my 911 (but it sees far less cold weather use) so Im posting the question here as well.

This may have been addressed before but ill ask it again as its some what specific.

What is the best cold weather transmission fluid. My 944 is my DD and its getting cold out here in PA. I got in the car this morning (it was around freezing last night) and the gears were very difficult to engage. I have experienced this before with both my 911 and 924S in the winter. The car sits out side most of the time so it cant be kept warm at night in a garage. This question goes out to all the people living up north who DD there 944's or 911's and have had similar issues. Once warmed up the car shifts fine but it takes about 10 minutes of driving to get it warm. I will be changing the fluid around thanksgiving so I will be researching until then.

Regards
Dave

In the past (non-Porsches), I have used Redline to combat this problem. While I don't (and wouldn't) use Redline in my 911, it has worked well in previous BMWs and such.

In your 944 use Mobil 1 or another synthetic. In your 911 run Kendall 80/90 and let it warm up