What is the difference between gear oil or fluid and manual transmission oil or

JeffyLube

New member
fluid for Subaru WRX? What is the difference between gear oil or fluid and manual transmission oil or fluid for 2002 Subaru WRX Sedan Manual 2.0L?

And what type (gear or manual transmission) oil or fluid should I use?
I was told 75W90 or 75W90NS, but I really don't know which one to use for the manual transmission. Like when I'm in 2nd, 3rd, and 4th gear and let go of the gas pedal, I hear it rattling underneath and a mechanic told me perhaps change the gear/manual transmission oil or fluid?

Also, what oil or fluid should I use for the rear differential (LSD)?

Thanks.
 
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