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It was a blissful -8F (-22C) this morning when I left for work. Granted, I did have the block heater running for a good while to warm up the engine (it was 90F when I started it up), but I could finally feel the gear oil making it a bit more difficult to shift. Not a horrible amount like I've had in previous cars with 75W90 gear oil, but you could feel it. I am still running the OE 75W80 gear oil. I wanted to experience at least one really cold day with it before swapping out. It doesn't get too much colder than that here, so today was the day.
Now, all I need is a nice warmish day to drain and refill the trans with the new Redline 70W/75W.
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