The Red Line 70W90 is the most popular gear oil, this is the preferred product in nearly all car and light truck differentials, both conventional and limited-slip. 75W90 is preferred for most racing applications. It contains friction modifier which is recommended for limited-slip units. 75W90 Gear Oil can be used in many transmissions and transaxles; however, other Red Line lubricants have better frictional properties for rapid synchronization. Exceeds API GL-5.
This oil is recommended for Subaru differentials.
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Works good in 2002 wrx
Saltdscott56541 3 years ago
This fluid works great in my 2002 wrx. Don't listen to the people reviewing this who put this i there sti rear dif. The STI has clutches that Wes doesn't so the STI requires a different type of fluid
Works great !
Fidrat 4 years ago
In my 03 WRX rear diff, I use Redline 75W90 at the recommended interval in my owners manual.The bad reviews come from Sti owners. NOT THE SAME DIFF!! , The WRX uses a viscous LSD where the STi uses a mechanical unit. I have 54,000mi on this oil in my rear diff and I haven't given it a second thought.
mkivjacob 6 years ago
i got the same metal grinding sound in my 06 sti i am going to change it to motul and hope the same doesnt come from it!
Not too sure.
faraco3 7 years ago
I recently changed the fluid in the rear differential on my 2006 sti from the OEM fluid to this Redline 75w90 fluid. Initially there seemed to be no difference, but after 4 or 5 days I began to hear a metal on metal sound coming from the rear differential. After 7 days I couldn't stand the sound any longer, so I replaced the fluid with OEM fluid from the dealership. I don't know if the fluid hurt my LSD, but just to be safe I will keep the fluid OEM.
QUESTIONS & ANSWERS
Q: red line 75w90 gear oil Guillermo 2 months agoAnswer
hi I have a 2014 Subaru sti hatchack I was wondering what this rear diff oil would it be okay to use?
A: This will be a great oil to use for your rear diff fluid.
Jared A. 1 month ago
Q: Flywheel change jdsmith123125605 5 years agoAnswer
I'm changing my flywheel in my 06 wrx and putting in an ACT streetlight flywheel what's the best gear oil to go with
A: For the transmission Redline states to use the 75W90-NS gear oil
Kirill C. 5 years ago
Q: is it ok for my diff wrxridehawaii 7 years agoAnswer
Hi is this gear oil going to be ok in my Diff(04wrx)? or am i going to have problems like the guy with the 06 sti and his diff?
A: yeah this should work great, the WRX uses a viscous LSD where the STi uses a mechanical unit. While I have never seen any problems in an STi differential, I have used this personally in several of my WRX rear diffs and I love it. Thanks. :)
Rick C. 7 years ago
This Part Fits
This item is non application specific.
Please verify compatibility before purchase. May require some modification for proper installation.