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Hi guys - this has probably been asked many times before, but what trans fluid should I use??

I have an R33 GTR 5sp behind a mild (300awkw - not sure if this makes any difference..??) RB26.... I know it will invariably be clunky before it warms up, but it's not a real nice shifter even when warm, and will crunch on most upchanges if they are even moderately fast. I don't know what fluid was used after the conversion, but I figure try something good, and see if it improves the shift quality before I start to panic. clutch seems to be ok, by the way...

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https://www.sau.com.au/forums/topic/175460-what-trans-fluid-to-use/
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