Originally Posted by compressro
Looking for some help Fuji,
Running 2.5/2.0 hybrid swap in my 02 WRX. Looking for mostly reliability. JDM STI RA gear set or LGT trans?
both of those arent bad choices. Difference would be gear spacing between those two. The LGT's gear spacing is similar to say a '00 2.5RS. The difference is that your tranny is a 3.900FD and the 2.5RS is a 4.111FD. Speed in each gear will be a tad faster in your tranny than a 2.5RS. The STi RA gearset you'll notice a taller 1st gear, which you may find helpful because you can get a bit more speed before shifting into 2nd for daily driving. After 1st gears, spacing is much shorter making acceleration much better, but note that 5th gear is a .825 ratio on a 3.900FD, which will have higher revs than stock; my JDM 6spd is a .842 with a 3.900FD.