I have an 11 wrx and I've started to notice my 3rd gear has a slight catch to it sometimes. Not a grind but when I put it in sometimes I feel a metal catch.. Took it to the dealer (I'm stage 2) said they couldn't do anything because of the mods. They recommended mixing my gear oil wi h Redline shockproof. I am at 32k miles so it's time to replace it.
My two questions are what gear oil weight do I need and what is a good mixture to use with the shockproof. I've searched around on forms but nobody has a new wrx they've put shock in. I've red to mix it all sorts of ways. I'm just curious what everybody recommends.