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Old 01-30-2013, 12:24 PM   #1
Scooby Newbie
Member#: 345405
Join Date: Jan 2013
Default '03 WRX Gear Oil Low (5mt)

So I took my car in to a lube shop to have the front/rear diff fluid changed. I didn't realize at the time that the front diff and transmission share the same fluid. I don't think the retards at the lube shop realized that either.

I got my car back and about a hundred miles later I noticed a whining noise coming from underneath whenever I was in gear and giving it gas. It would increase in pitch as I accelerated. It's not a grinding noise or anything like that. Just sounds like there is excess friction going on.

So I checked my gear oil dipstick... dry as a bone.

I don't wanna deal with those baddies at the lube shop anymore. Do you think I could get away with just trying to top off my gear oil with any GL-5 rated 75w90 oil? I have some Mobil1 LS synth stuff but I have heard bad stuff about it.

I know about the Uncle Scotty's mix. And frankly, if I were to change the fluid myself, I would just go with the OEM Extra-S stuff. But only if I have to.

Is it safe to just add some gear oil? What kind would you recommend? I saw some of that Pennzoil synchromesh stuff at Advance.

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Old 01-30-2013, 12:52 PM   #2
Uncle Scotty
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Member#: 16200
Join Date: Mar 2002
OK buy Nates beans


there are hundreds of threads on this same exact subject

stay away from synthetic lubes and you do NOT want ANY 'LS' type lube in the trans

it CERTAINLY needs to be changed......do that
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Old 01-30-2013, 01:10 PM   #3
Scooby Newbie
Member#: 345405
Join Date: Jan 2013

Yeah most of them are not definitive. Just people arguing back and forth.

I would try your mix if I could get the ingredients locally. Also, some threads state that the extra-s stuff is synthetic. But it's OEM so... ?

Just didn't know if I could get away with a top off of something or if I should just change it again. The stuff in there is new.. just low.

EDIT: you say to stay away from the LS stuff but the ingredients in http://forums.nasioc.com/forums/showthread.php?t=920674 say to use the castrol hypoyc stuff which has been relabed as "axle Limited Slip". Can LS mean more than limited slip? Or is it just the synthetic part that makes it bad?

Last edited by betamax; 01-30-2013 at 01:17 PM.
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