Quote:
|
Originally Posted by Dean
Quote:
|
Originally Posted by MikeK
Quote:
|
Originally Posted by Dean
I personally would reccomend the Subaru factory fluid.
|
I disconcur with this. My transmission shifted like arse on the factory fluid. I am sure you guys are sick of hearing about me bitch about it by now. Last month before thunderhill Nate put redline lightweight shockproof in and the difference has been night and day. The shifting is smooth, no grinds, and it is much easier to get into first now. |
I understand you have had issues, but do we know the impact of having the shockproof in the diff?
I have the stock fluid in my 02, and have had no problems at all, and I slam first like nobody's business.
All I am saying is that Subaru engineers proabably spent many hours selecting te right fluid for the complete system covered by that fluid, and if it ain't broke, don't fix it.
If you are having a specific issue, talk to knowledgeable people and try something, but understand the risks involved in doing so. I personally have know idea what any fluid will do to the diff, and tranny combination in the STI. |
Shockproof is essentially a 90w140(ns?) weight oil with a property that makes is stick to *everything* creating a coating layer that won't spin off gears easily. In fact, it's damn near impossible to drain a tranny of the stuff unless you get the gearbox nice and hot 1st.
I don't know about using the oil in a diff, but if it performs as well as a "regular" synthetic in the diff regarding the proper amount of friction, plus it sticks to the gears to provide a layer of protection against gear shock, then I can't imagine there's a downside to the stuff aside from cost and possible warranty issues (as it's not a GL-5 oil technically).
As far as "if it ain't broke"... most people w/ Subarus *do* think "it's broke". I know I *hated* shifting my car before the switch to synthetics. It's still not as easy as I think it should be, but at least now it's consistant. I used to grind all sorts of gears shifting... and not even speed shifting. Now with the Redline oil, I can go 1-2-3-4-5 as fast as possible with no issues, and only a quick downshift to 1st requires double clutching to avoid grinding.
The only point of contention to me is "how is the 6MT different from the WRX's 5MT?" I don't think there's really any significant difference that would affect oil selection, but I don't know that for sure. However, if Nate were to recommend it, then I'm on board, since that meshes with my experience w/ gear oils.