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Old 03-18-2008, 02:57 PM   #1
fort
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Default gear oil

I'm approaching 75K on my 02 WRX and wanted to get some ideas/recommendations on what to go with when I change the transmission and rear dif oils.

lets try to get a response or two before unibomber "moves" this to the nooby section............................no disrespect meant UB.
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Old 03-18-2008, 03:04 PM   #2
berge56
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I used Redline lightweight shockproof for the Transmission (Manual) and for the rear diff I used Amsoil synthetic 75w90. You can use any GL-5 gearlube in the rear diff....syn may be best for lowering friction and operating temperatures. I have had zero issues with the tranny or diff.
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Old 03-18-2008, 03:10 PM   #3
Chino Bling
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currently i'm using amsoil severe gear 75w-90 in the rear diff. in the tranny, i'm using regular valvoline.

i was using the severe gear in the tranny, but i broke my tranny after about 1200 miles (not related to the gear lube). now i'm just using cheap valvoline gear lube on the new tranny (since i need to change the lube after 500 miles), and i haven't noticed any difference over the more expensive gear lube. when i change the tranny fluid, i may just stick with the non-synthetic since i didn't notice any difference with the expensive stuff.
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Old 03-18-2008, 03:25 PM   #4
litebrite2001
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Mobil 1 75W-90 in both the tranny and diff. I did it at 30,000 and will again at 60,000 when I get there. The rear diff is dead easy, but re-filling the tranny was a PITA. I wound up just removing the intercooler to do it.
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Old 03-18-2008, 03:37 PM   #5
fort
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thanks for the responses.
now just cause I don't have the info with me at work and i may be ording online.............how much in each?
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Old 03-18-2008, 03:47 PM   #6
litebrite2001
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Tranny is 3.5L or 3.7 US Quarts
Diff is .8L or .8 US Quarts
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Old 03-18-2008, 04:19 PM   #7
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redline 75w90 in my tranny and valvoline synth 75w90 in my rear diff.

have fun re-filling the rear diff took me forever b/c I was squeezing it through a tiny vinyl tube. SLOW process.
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Old 03-18-2008, 05:34 PM   #8
enominus
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ive only done the tranny and that was cakewalk, as long as you have a long funnel. all i had to do literally was unscrew a 21mm(?) bolt at the bottom and take the dipstick out from the tranny to fill, easier then an oil change lol

btw i filled with the uncle scottys mixture,

1 qt redline lightweight shockproof(might have to hunt for it)
1 qt penzoil syncromesh
2 qt castrol hypox 80w 90
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Old 03-18-2008, 05:36 PM   #9
Ike83
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Quote:
Originally Posted by enominus View Post
ive only done the tranny and that was cakewalk, as long as you have a long funnel. all i had to do literally was unscrew a 21mm(?) bolt at the bottom and take the dipstick out from the tranny to fill, easier then an oil change lol

btw i filled with the uncle scottys mixture,

1 qt redline lightweight shockproof(might have to hunt for it)
1 qt penzoil syncromesh
2 qt castrol hypox 80w 90
I also used Uncle Scotty's cocktail for the transmission, along with Redline gear oil in the differential.
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Old 03-18-2008, 05:44 PM   #10
03WRX_Rich
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Dino up front

Synthetic 75w-90 for rear. Duct tape a larger diameter tube to the bottle and SQUEEZE to fill the rear w/o a lift.

cheers
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Old 03-18-2008, 05:48 PM   #11
Chino Bling
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you can buy a tool to make filling the rear diff easier at any autoparts store for like $8...
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Old 03-18-2008, 05:50 PM   #12
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^^^^ that tool is crap.....
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Old 03-18-2008, 06:07 PM   #13
IIdiceII
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scottys cocktail

give it a search. did wonders for my trans.

i can downshift into first (not that i do it) at 25mph without double clutching. before i couldnt get the car into first sitting still cars shifts SOOOOOO much easier now.
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Old 03-19-2008, 06:06 PM   #14
ajwrxwgn
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Quote:
Originally Posted by enominus View Post
ive only done the tranny and that was cakewalk, as long as you have a long funnel. all i had to do literally was unscrew a 21mm(?) bolt at the bottom and take the dipstick out from the tranny to fill, easier then an oil change lol

btw i filled with the uncle scottys mixture,

1 qt redline lightweight shockproof(might have to hunt for it)
1 qt penzoil syncromesh
2 qt castrol hypox 80w 90

got the redline and syncromesh but couldn't find anything other than Castrol Hypoy C 80w 90 will that have the same results?
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Old 03-19-2008, 06:22 PM   #15
Chino Bling
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Quote:
Originally Posted by SUBYDOODIE View Post
^^^^ that tool is crap.....
what's wrong with it? it works just fine for me...
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Old 03-19-2008, 08:15 PM   #16
enominus
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Quote:
Originally Posted by ajwrxwgn View Post
got the redline and syncromesh but couldn't find anything other than Castrol Hypoy C 80w 90 will that have the same results?

huh? thats what i typed, i just miss spelled.. oops.
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Old 03-20-2008, 11:13 AM   #17
fort
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I went through the Scotties cocktail posts and from what I see you need to change it every 20K or so; what is the word if you go 50-50 on the RL Shockproof and Pens-oil Syncromesh?
what was the size for the torx bolt on the rear diff?
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Old 03-20-2008, 11:22 AM   #18
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Quote:
Originally Posted by Ike83 View Post
I also used Uncle Scotty's cocktail for the transmission, along with Redline gear oil in the differential.

Me too. Scotty's Cocktail is unbelievable! And I felt a difference with the new Redline 75w-90 in the rear diff. Nobody that has ever used Scotty's Cocktail will recommend anything else
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Old 03-20-2008, 11:23 AM   #19
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Quote:
Originally Posted by fort View Post
I went through the Scotties cocktail posts and from what I see you need to change it every 20K or so; what is the word if you go 50-50 on the RL Shockproof and Pens-oil Syncromesh?
what was the size for the torx bolt on the rear diff?

All you need is a 3/8 ratchet. You don't need to change it any more often than normal tranny fluid, and you need to stay as close to the specs as possible, I know from experience it won't be the same otherwise
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Old 03-20-2008, 11:28 AM   #20
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man, why do always see "US cocktail is good!" "No, US cocktail is bad!"

It's like, are eggs good or bad for you?
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Old 03-20-2008, 11:30 AM   #21
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can anyone link the original post to scotty's mix
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Old 03-20-2008, 12:22 PM   #22
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Quote:
Originally Posted by Poekin View Post
can anyone link the original post to scotty's mix
yes sir

http://forums.nasioc.com/forums/showthread.php?t=920674
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Old 03-20-2008, 12:25 PM   #23
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Quote:
Originally Posted by smurfwrx View Post
man, why do always see "US cocktail is good!" "No, US cocktail is bad!"

It's like, are eggs good or bad for you?

I've never known anyone to speak badly about it who's actually used it. As for me, I had a grind any time I would up-shift into 4th, and could never put the car into 1st gear unless I was almost completely stopped. With the cocktail, I can go into 1st sometimes over 20mph! and no grind in any gear EVER (except the 3 times a year from neutral into 1st, even that is better). I can shift smoother and faster into every single gear, revmatching/downshifting is smoother, everything about the tranny feel and performance was much improved
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Old 12-06-2008, 09:45 PM   #24
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Quote:
Originally Posted by Audiosavvy View Post
All you need is a 3/8 ratchet. You don't need to change it any more often than normal tranny fluid, and you need to stay as close to the specs as possible, I know from experience it won't be the same otherwise
? no need for the T70 bit?
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Old 12-06-2008, 10:35 PM   #25
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Not usually. Although I've never seen a 3/8" square, I've only seen the much more standard 1/2" square. Maybe the WRX uses a different, smaller plug than the other Subarus I've had or worked on.
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