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Old 03-16-2009, 10:27 PM   #40
FuJi K
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Member#: 3687
Join Date: Jan 2001
Chapter/Region: MWSOC
Location: St. Paul, MN
Vehicle:
MY99 GF4 JDM 6spd
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Quote:
Originally Posted by Dragon963 View Post
Interesting thread!

I am thinking of rebuilting my '02 WRX transmission with STi RA gear set. I made some calculation and it seems that the ratios with the 3.90 FD will be similar to a STi 5spd 4.44FD (non-RA), except for the first gear that will be quite a bit longer.

If someone have done it before, what's the feeling of it? is the first gear too long when you start from a complete stop, or is it fine?

STi Gears
1st 3.166 * 4.44 = 14,05704
2nd 1.882 * 4.44 = 8,35608
3rd 1.296 * 4.44 = 5,75424
4th 0.972 * 4.44 = 4,31568
5th 0.738 * 4.44 = 3,27672

WRX with sti RA gear
1st 3.083 * 3.90 = 12,0237
2nd 2.062 * 3.90 = 8,0418
3rd 1.545 * 3.90 = 6,0255
4th 1.151 * 3.90 = 4,4889
5th 0.825 * 3.90 = 3,2175
I think You'll like it. It's decent. 1st gear may be long, but most say it's too short. It'll feel like a USDM '07 STi with the 3.900FD with slightly longer 1-2. That's all.

The WRX running the Outback tranny is like the USDM '07 STi running through gears 1-4.
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