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Discussion Starter #1
My 19 sti only has 10k miles on it and I’m getting 2nd gear grind from the 1-2 upshift. Never happens on a downshift. After I let the tranny warm up for a bit it’s better but 2nd is still way more notchy and rough than all the others. When the grind happens it’s usually towards the end of the throw. Took it to the dealer all I got was that they couldn’t replicate. I had the tranny flushed at 7k because I hated the way oem fluid shifted. Any advice? Any driving/ shifting tips? I do live in Canada so it is quite colder right now.
 

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I replied in your other thread but I have a similar issue and I also live in Canada. The only thing I found that prevented it was taking first up to 3500 rpm before shifting. Seems counter intuitive but it works for me.
 

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I have 15 STi, Bought used 30k Km.
No history was found when purchased so I decided to do full tranny flush.
OE Short Throw installed and Gear 3 was not happy (before and after short throw) with factory oil (assuming factory tranny oil)
went with motul becuase all the hype 75W90.
Gave time with motul and still Gear 3 not happy and grinds.

So went back and Got redline tranny oil.
They have two different oil.
75W90NS for your Six speed Tranny
75W90 for your Rear diff.

Night and day. So smooth.
I am happy.

(Also Redline is easier to buy than motul in Alberta.)

Hope this helps.
 
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