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Old 11-17-2002, 06:09 PM   #1
keithja
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Default Socket size for a tranny and rear end fluid change/fluid question too

Hi,

I am going to perform a tranny and rear end fuild changes. The vehicle is a 2003 WRX and I live in the USA.

What size socket is needed? Any brand oil pump recommended for the rear end?

I have also narrowed down my fluid choices to:
-Redline 75W90NS for the tranny and 75W90 for the rear end OR
-Royal Purple Max-Gear for both the tranny and rear end.

Snookem did alot of research and ended up liking Royal Purple. Any other opinions?

Snookem's negatives on Redline were that he had not data sheet that said it was OK with bronze synchos plus several negative reports (or at least confusing reports from users). Any thoughts?

I know the fluid thing is old turf, but after reading all the threads I am still pretty confused.

Thanks in advance, Keith
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Old 11-17-2002, 06:17 PM   #2
HndaTch627
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22mm socket for the drainplug on the trans a 1/2" extension and ratchet for the rear end.

jeremy

FWIW you are going to get grinding if you use Redline or any synthetic in the trans.
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Old 11-17-2002, 06:18 PM   #3
cnk
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I'm using Redline in my tranny and rear diff and have never gotten grinding. Been using it for about 6000 miles now.

Calvin
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Old 11-17-2002, 09:47 PM   #4
8Complex

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Jeremy probably just missed the 75W90NS above. Redline fluids with the NS are non-synthetic.

Note, I do get grinding on NS fluid, but I think it's the way the dealership crappily rebuilt my transmission.
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Old 11-17-2002, 10:04 PM   #5
cnk
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75W90NS is synthetic. The NS only indicates that it doesn't have friction modifiers. Per the Redline Oil website:

75W90 NS - a GL-5 which does not contain the friction modifiers for limited-slip hypoid differentials. This makes the transmission synchronizers come to equal speeds more quickly, allowing faster shifting and much easier low-temperature shifting. Can also be used in racing limited-slip differentials where weak spring design causes too much wheel spin.

Calvin
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Old 11-18-2002, 01:36 AM   #6
HndaTch627
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Quote:
Originally posted by 8Complex
Jeremy probably just missed the 75W90NS above. Redline fluids with the NS are non-synthetic.

Note, I do get grinding on NS fluid, but I think it's the way the dealership crappily rebuilt my transmission.
how dare you wait till you get about 10k-15k on it.

jeremy
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Old 11-18-2002, 08:08 AM   #7
mav1c
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I plan on doing the same thing this week. Do you know how many quarts are need for the tranny? I'm assumming just one will do it for the rear diff. I've never done either change myself, so any tips, hints, or instructions anyone wants to pass along?

Thanks
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Old 11-18-2002, 11:39 AM   #8
tuca33
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Question

Is it really worth to change the tranny fluid??
what are the benefits??
and about brake and other fluids??
should i chankge them?
Thanks
Tuca
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Old 11-18-2002, 03:33 PM   #9
BlkRexWagon
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Hey guys, I was wondering if those of you who changed the tranny/diff fluids did so for improved reliability/longevity or for a performance enhancement? I was thinking of changing mine, but it would only be because I plan on having this car for a looooong time and would like to protect my investment. Thanks!
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Old 11-18-2002, 05:21 PM   #10
keithja
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Default Going to DOT 5 Brake Fluid would be another change

that could be considered. Is the WRX brake system DOT 5 compatible?
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Old 11-19-2002, 02:41 AM   #11
HndaTch627
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Default Re: Going to DOT 5 Brake Fluid would be another change

Quote:
Originally posted by keithja
that could be considered. Is the WRX brake system DOT 5 compatible?
dot 5 no, dot 5.1 yes....look in the suspension/brakes/tires forum, there's a good post about brake fluids by 8complex.

jeremy
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Old 11-19-2002, 09:53 AM   #12
8Complex

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Quote:
Originally posted by HndaTch627
how dare you wait till you get about 10k-15k on it.
Was rebuilt around 29k... I have about 44k on it now. Still sucks arse.

Here is that brake fluid post, BTW... http://forums.nasioc.com/forums/show...hreadid=159647
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Old 11-19-2002, 01:04 PM   #13
HndaTch627
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Quote:
Originally posted by 8Complex


Was rebuilt around 29k... I have about 44k on it now. Still sucks arse.

Here is that brake fluid post, BTW... http://forums.nasioc.com/forums/show...hreadid=159647
that's cause of the morons that rebuilt yours
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Old 11-19-2002, 06:06 PM   #14
rotorbaru
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To get back on topic,

I put redline light weight shock proof in my trans and rear diff.

I can't tell any difference on the rear differencial but the transmission definately shifts smoother now with no grinding - so far I recommend it. Cobb has a right up on fluids, he recommends ultra light weight shockproof if you go with shock-proof, but I had light weight and it seems to work fine.

I have seen a racing transmission rebuilt that had shock-proof used in it, the stuff is amazing how well it clings to metal.

BTW does anyone else get a faint gear whine from the rear end (I think) when doing 60 mph and the drive line isn't under any load, i.e. between on throttle and off throttle? I got gear whine with the original oil too.
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Old 11-19-2002, 06:40 PM   #15
Steppin Razor
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Quote:
Originally posted by rotorbaru

I put redline light weight shock proof in my trans and rear diff.

BTW does anyone else get a faint gear whine from the rear end (I think) when doing 60 mph and the drive line isn't under any load, i.e. between on throttle and off throttle? I got gear whine with the original oil too.
can't wait to hear what hndatch has to say about this

Also, the tranny holds 3.7 US quarts. Tighten the drain plug to 33 ft/lbs.

The rear diff hold 0.8 US quarts. Tighten the filler and drain plugs to 36 ft/lbs.
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Old 11-19-2002, 07:26 PM   #16
BeavisNuke
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I'm still a little confused here - so which brand/weight is best exactly?

Red line?

Should I ask for tranny fluid specifically or do I just go to pep boys and buy oil?
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Old 11-19-2002, 07:35 PM   #17
cnk
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You'll get different opinions. I'm using Redline 75W90NS in the tranny and 75W90 in the rear diff.

Calvin
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Old 11-19-2002, 07:40 PM   #18
Steppin Razor
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As far as I can tell, almost everyone will agree that Redline 75w90 is the way to go in the rear diff.

As far as tranny fluid goes, it's still up in the air. What's the diff between Redline's superlightweight shockproof and their 75w90NS?
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Old 11-20-2002, 08:35 AM   #19
rotorbaru
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[As far as tranny fluid goes, it's still up in the air. What's the diff between Redline's superlightweight shockproof and their 75w90NS?]

You may want to go to Redlines website to read about the exact difference between superlightweight shock proof and 75W90NS.

I can tell you I know shockproof has special additives to cling to the metal parts, so basically everything is always coated with oil - even after sitting for weeks! Shockproof aslo has friction modifiers added so it is say to use with limited slip differentials.

According to Redline, light weight shook proof has the equivalent shock protection of a 75W140 oil with having the thickness of a heavy oil.

If someone can come up with definate proof of why this isn't good stuff to use (besides being real expensive) I am willing to hear it, until them I am sticking with the shockproof!

(Besides, most transmission failures you hear about here on I-club come from shockloading, i.e. 5k+ rpm then clutch drop, what better than shockproof to prevent that)
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Old 11-20-2002, 09:40 AM   #20
dwx
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There are a few of us in this area that put in the Redline Ultralight Shockproof at one time. I've got 10-15k miles on the car since then and it shifts perfectly fine. It was definitely smoother after doing the MT swap from the old stuff. I'd probably use the lightweight as opposed to the ultralight though if I change it again. For the rear diff just use regular Redline 75W90. There are lots of thread in the _transmission_ forum discussing these things.

Phil
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Old 11-20-2002, 09:48 AM   #21
omahasubaru
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Quote:
Originally posted by HndaTch627
FWIW you are going to get grinding if you use Redline or any synthetic in the trans.
I haven't hand any problems with grinding and all in my car since I put in Redline MT-90... however I haven't really driven it too hard, just got the clutch broke in this morning.

Off Topic
Speaking of clutch break in... I've never heard of a break in period for most other vehicles when replacing a clutch... why the heck are these so different??

Thanks - Jon
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Old 11-20-2002, 09:56 AM   #22
BlkRexWagon
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Quote:
[i]
Off Topic
Speaking of clutch break in... I've never heard of a break in period for most other vehicles when replacing a clutch... why the heck are these so different??

Thanks - Jon [/b]
I have had friends replace clutches in everything from VW Rabbits to V8 Firebirds and they have all had a break-in period for the new clutch. I would assume it depends on the clutch manufacturer, but we all know what assuming does
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Old 11-20-2002, 10:52 PM   #23
tuca33
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So,,my car is 1000 miles and i dont know if i change those oils now,,or wait a little longer..
i will change my engine oil with 1500miles..
Thanks
Tuca
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