when i put it in 4th, i get like a little crunch noise (not grinding)... may be the synchro is worn out? and what can i do to make the gears a little bit smoother to shift? the guy i know that owns a car repair place says it's because subaru uses gated trannys instead of H-matics? i dont know
Use penzoil's synchromesh. Its a parafin based oil that is supposed to allow your shifting to be much smoother. I picked up a quart from amazon.com. I am going to drain about 1 quart of oil, and fill it back up with the synchromesh.
I did something very similar to uncle scottys cocktail and it fixed my problem which was a grind/crunch from 3-4 and 4-5. I think the syncro mesh is the key ingredient. The problem was fixed immediately. I would try that first.
take the drain bolt out from under the tranny and let it drain heres a link for directions http://www.wrxatlanta.com/forums/showthread.php?t=10511 /edit your bolt size is probably different than the 03 everything else should be the same