Changing fluids tomorrow..
 

Hello all, I am taking my 96 LSI in for a transmission fluid change and oil change. Should I stick with the Subaru transmission fluid, or should I change over to Red Line. I have used Red Line in my other cars for years and love it, but those cars were manual transmission cars. This is my first Automatic and I want to be sure I use the correct stuff.. Also, should I change the rear differential fluid at the same time? Thanks in advance...

I use synthetics (Mobil 1), but some advise against it.

yes to rear dif, and don't forget the front diff too. these can be synthetic as well. I'm not sure on 96 models but the rear is probably a LSD unit, so make sure whatever you put in covers that issue.