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When to change manual tranny oil


goatman
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I was just looking at my records and the last time I changed the tranny fluid on my subie was about 20K ago. When I changed it last I used Redline 75W-90NS. Its an 84 wagon 4wd with the 4spd, what do you guys think? Leave it in or change it out?

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I was just looking at my records and the last time I changed the tranny fluid on my subie was about 20K ago. When I changed it last I used Redline 75W-90NS. Its an 84 wagon 4wd with the 4spd, what do you guys think? Leave it in or change it out?

'83 FSM says 30,000 miles for replacement. That's with a conventional gear oil tho. Redline is a synthetic and should be good well beyond the 30,000mi mark let alone 20,000mi. I'd leave it in.

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