4th gear grind scotty COCKTAIL question.

[02WRXbugeye]

I have a 06 wrx salvage title with 30,000 on it and im getting a grind into 4th gear when I shift above about 3,000rpms. I have changed the tranny fluid and the oil had no little metal shavings or anything. I was just looking for opinions on the cocktail and if anyone knows where to find the redline lightweight shockproof stuff. i went to autozone and shucks oriely and walmart and they all didnt have it. is there anything that is a different brand that does the same thing? i also got a different brand instead of Castrol Hypoy C 80w90 it is 80w90 though. is that ok?

let me know, thanks.

[man show]

You might want to avoid Uncle Scotty's Cocktail altogether. True, it may cure grinding issues and smooth out your shifting, but it's also been proven to turn acidic over time and that can be bad for your transmission internals too. Another option you might want to consider is the Andrewtech Cocktail: 3 Quarts Redline Shockproof + 1 Quart Motul Gear 300. Both can be found online.

What fluid did you use when you changed it the last time?

[02WRXbugeye]

I just use the recommended non synthetic fluid. Is the andrewtech supposed to get rid of my grind as well?

[c2bcoolwrx]

Andrewtech (them and DS1 motorsports are the "best" subaru tranny guys in the USA) swears by that cocktail and I have heard nothing but good things on NASIOC about it.

Personally, I just use straight Motul Gear 300 (Turn in Concepts/TIC recommends it) and it works great. I have over 80k miles on my tranny, 20k of which has been at 320whp/294wtrq. I have yet to see any shavings when draining my tranny fluid and do not have any grinding issues (knock on wood). Best fluid I have used (compared to Redline 75w90NS and Subaru Extra S).

[AkSoul]

I use Royal Purple 75-90w gear oil no probs so far after 75k miles

[man show]

I've been using Redline 75W-90NS in my transmission and Redline 75W-90 in my rear differential from 3,000-41,000 miles and haven't had any issues. I think I might switch to the Andrewtech Cocktail when I change the fluids again at 60,000 miles because I've heard nothing but good things about it too and I'm curious to see what all the fuss is about.

02WRXbugeye: As far as whether or not it will solve your griding issues, I don't know. The guys at Andrewtech Automotive might know though, or you could just try it and see for yourself. Good luck!

[newtothegame]

Mat, formerly of 555 Motorsports (who worked in conjunction w/DS1) and I just talked the other day about my build. Part of which includes upgrading to PPG helical 1-4. Even with the upgrade he mentioned/suggested to use the andrewtech blend, so when I change out gear sets I will be using that also.

[phatmike0704]

i use scotty's. took out the grind but its real stiff and sometimes i gotta double clutch for 2nd. guess its gettin real thick since its gettin cold out

[airplnmdls]

I bought Subaru 75W-90 Extra S from fredbeansparts.com ...I got it in the mail last week...just waiting for my baby back and then I'll throw it in!

[turmic]

The 90 LS is for the limited slip....or that's what the can said on the shelf at my subaru dealer the other day. Which is rear diff oil anyways...