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Old 05-17-2002, 06:33 AM   #1
mitch808
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Join Date: Sep 2001
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2002 Subaru WRX

Default amount of fluid in tranny?

I've heard of people changing their tranny oil and only putting in roughly 5-7qts when changing.

In the manual it says 9.5qts or 10 liters, IIRC. I'm guessing that is a dry measurement?

How much oil do I really need to buy? At $10-12 a qts for redline oil, I don't want to buy 10 qts, but I don't want to buy 5 and realize that I'm short.

At least I know what the rear diff uses
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Old 05-17-2002, 12:56 PM   #2
sperry
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4EAT or MT? I just swapped the oil in my Manual Tranny last night... 3.7 qt went in, but I think I'm a little on the high side of full, since <3.7qt drained out... the manual says 3.7qt.

I'm guessing you have the 4EAT since the numbers you mention sound like the auto's oil capacity. I've read that you're supposed to get the auto flushed if you're gonna swap the fluid. That usually means you have to take it to a place w/ the crazy flushing machine, but I read a home-brew way of doing it on www.scoobymods.com (i think it was there...) that involves draining the fluid while running the motor to turn the tranny (sounds dangerous to me!), either way, I wouldn't swap it unless you can swap all 10qts... what's the point of all that work / expense to have half synthetic tranny oil?

--Scott
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Old 05-17-2002, 04:46 PM   #3
Jademonkey
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If it's a 4eat, yea those numbers sound right. But if you're just going to drop the pan, it's only like 4 quarts. To get everything out, you have to pump the tc.

You don't have to flush the fluid. If it's burned though, you'd better flush it. If your fluid is normal, you can just drop the pan, and put in your new stuff, then drive it a few weeks then drop the pan again and dump some more in. That's what I plan on doing with mine. I'm going to get some redline. There isn't anything wrong with having a synthetic blend.
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Old 05-17-2002, 04:58 PM   #4
mitch808
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Sorry this is for a 5MT
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Old 05-17-2002, 05:07 PM   #5
sperry
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For my 5MT I dropped by Summit and grabbed 4qts of RedLine 75w90ns gear oil. DO NOT get the 75w90 (no "ns") for the transmission, as the friction modifier in it is BAD for the synchros (but the non-"ns" stuff works great in the rear diff). I followed the instructions for changing fluids from Scooby Mods.

I changed my oil (installing a fumoto valve in the process), changed my tranny oil, and rear differential oil in 4 hours. That includes a dinner break, and a trip to Pep Boys for a fluid pump so I could add the 75w90 to the rear diff.

The quantities for the WRX:

5MT Transmission: 3.7 US quarts (I used RedLine 75w90ns, RedLine Shockproof gear oil also has good reviews)

Rear Differential: 0.7 US quarts (I used RedLine 75w90)


--Scott
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Old 05-24-2002, 09:21 PM   #6
NotoriousWRX
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Default Re: amount of fluid in tranny?

Quote:
Originally posted by mitch808
At $10-12 a qts for redline oil
It's $7 a quart at www.myoilshop.com
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Old 05-24-2002, 11:21 PM   #7
mitch808
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Default Re: Re: amount of fluid in tranny?

Quote:
Originally posted by NotoriousWRX
It's $7 a quart at www.myoilshop.com
Thats nice and all, but you should try and live in Hawaii. Shipping things here will more then make up for the cheaper price. There is no such thing as UPS ground. We only have 2nd day or faster.
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Old 05-25-2002, 12:45 AM   #8
COwannago
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Quote:
5MT Transmission: 3.7 US quarts (I used RedLine 75w90ns, RedLine Shockproof gear oil also has good reviews) Rear Differential: 0.7 US quarts (I used RedLine 75w90)
Aye, I changed mine just last month with the above and it works great!

Nick C.
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Old 05-26-2002, 05:24 PM   #9
shortlid
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Default Shipping

How much is shipping at these prices??
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Old 05-28-2002, 02:08 PM   #10
Stanley
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Talking

Quote:
Thats nice and all, but you should try and live in Hawaii.
OK. I'll pay more for shipping, beer and steak for never ending summer and miles of warm water beaches!



Sorry, couldn't resist. Seriously, even if it costs you $15 a delivered quart that's ~$65 for a job you only have to do every 30K or so. Think of this expense in relation to the amount you spend on fuel and it won't seem like as much money.
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