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Old 10-21-2004, 09:25 PM   #1
Converted
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Default Any thing to know before I change my tranny fluid ?

Just one bolt on the tranny case right? Let it drain, then fill it up on throught the tranny dipstick ? Right?

Thanks!
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Old 10-21-2004, 10:15 PM   #2
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Its a LOT easier if you get funnel with a tube attached. That way you don't have to take the intercooler off.
And please,,,for the love of GOD...do not use Mobil 1 in your tranny.
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Old 10-21-2004, 10:19 PM   #3
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Ok, so use a funnel, I probably would of but good lookin out, I have a perrin FMIC, so it should be even easier.

What do you suggest, NEO or Redline ?
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Old 10-21-2004, 10:25 PM   #4
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Quote:
Originally Posted by Converted
Just one bolt on the tranny case right? Let it drain, then fill it up on throught the tranny dipstick ? Right?

Thanks!
I'd like to know the same... I'm due to flush my fluid too.
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Old 10-21-2004, 10:41 PM   #5
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To be honest with you, tranny oil has been pretty much been a hit or miss topic with members on here. There have been inconsistent results with everything and anything. What works for me may work for the next person but the next two in line may report back with grinding issues. So I say find one, use it and see how it goes - hopefully it'll be good results so you're spared with trying out a different ones. I've tried two synthetics (Redline and Neo) and they both caused grinding. Using whatever the dealer put in now and it's working as smoothly as when the car left the lot. FWIW, I bought some Valvoline 75W-90 for my next tranny oil change so I'm keeping my fingers crossed.

I suggest checking the sticky up top about tranny oils:

http://forums.nasioc.com/forums/showthread.php?t=416514

or another recent one:

http://forums.nasioc.com/forums/showthread.php?t=620448
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Old 10-21-2004, 10:52 PM   #6
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Be prepared for battle too. That tranny bolt can be a bear to loosen.
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Old 10-21-2004, 10:54 PM   #7
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2004 uses a torx T-70 for the transmission bolt, right? If so - you are going to need one of those...
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Old 10-21-2004, 11:22 PM   #8
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Is the torque spec for the 2004 tranny drain plug still 33 ft-lb?

-Charles-
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Old 10-22-2004, 12:15 AM   #9
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My 'cocktail'(see Hank3's second link) seems to have worked for a few people and I'm still lovin' it.....the HypoyC seems to be smoother than the Valvoline.

I've had people PM me and grab me at meets and tell me that they are real happy with it.....
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Old 10-22-2004, 12:32 AM   #10
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Dammit I can't find ANY of the "cocktail" ingredients anywhere, except he redline shockproof. Thoughts anyone? I can't find the gm syncromesh (which I figured would be easy to find) and the unicorn-like 75w-90 gear oil, valvoline or castrol. GRrrrr

EDIT:: Just saw Scotty's post on the other thread.
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Old 10-22-2004, 01:13 AM   #11
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The Autozone's and the Discount's near me have both the synchromesh and the HyopyC.....

Call around....NAPA will have/can get them both....Carquest near me has some 'oddball' stuff and ALWAYS has what the others don't....
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Old 10-22-2004, 08:18 AM   #12
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GM dealers (Chevy, GM, Pontiac at least) should stock the GM Branded Synchomesh, as it's called for in the 5 speed C/K1500 tranny and the later Fiero trannies. You will pay top $$$ though. None of the regular outlets (Pep Boys, Autozone, Penn Jersey, etc.), et al near me stock the Pennsoil version - I would have to order a case.
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Old 10-22-2004, 10:00 AM   #13
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I am changing both the tranny and diff oils this weekend on my car (99 L 5 spd) the manual says there should be a dipstick for the tranny fluid. I don't have one.
Second, where is the fill for the tranny? I see the drain bolt plain as day, but not the fill.

What to use for the rear diff plugs? they are the square holes? been told I could use a 1/2 inch drive for it.

Using Mobil 1 syn for both. I tried redline in a previous car and didn't have much luck with it.

thanks
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Old 10-22-2004, 10:18 AM   #14
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Quote:
Originally Posted by Jaker
Second, where is the fill for the tranny? I see the drain bolt plain as day, but not the fill.
you fill through the dipstick tube.
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Old 10-22-2004, 10:20 AM   #15
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There should be a yellow-handled dipstick toward the rear of the engine compartment. If you bought the car used it could conceivably be missing, which would be a bad thing.
There is no separate filler, the trans is filled through the dipstick tube. This requires a long, thin funnel (transmission funnel, available at parts stores).
I highly recommend against using Mobil 1 synthetic gear oil in the trans. It contains friction modifier additives (intended for use with wet LSDs) that will interfere with proper synchro operation. There is a version of Mobil 1 w/o these additives but you won't find it in stores. People who have used the standard Mobil 1 in their trannies have had shifting problems afterward.
What Redline did you use previously? The proper selection for the transmission is the 75W90 NS, which does not have friction additives. Standard Redline 75W90, like the Mobil 1, does have the additives and should not be used.
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Old 10-22-2004, 11:05 AM   #16
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So even with Redline 75w90NS people have seen grinding issues ?

I dont grind now, its just not smooth like id like it to be. My brother switched to Neo on his 02 and it was much smoother so I thought i would ?
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Old 10-22-2004, 11:08 AM   #17
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There is no dipstick on three of the GC8s I looked at. My friend has a 98 RS, 96 L and mine is a 99 L.

I used RedLine 75/90 regular stuff. Changed the oil to redline at 175k Worked fine for a little then the tranny blew about 25k later. second tranny used reg oil and lasted only 10k, third tranny still going after 50k. '97 Tercel currently has 247k on it.
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Old 10-22-2004, 12:00 PM   #18
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It took my friend and I a few minutes to find the tranny dipstick to his 00' Impreza RS. The handle isn't that big (compared to the WRX one) and it didn't help that it was REALLY dirty...
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Old 10-22-2004, 12:05 PM   #19
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thanks, we will look again this weekend.

OT: HankIII rules!!
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Old 10-22-2004, 02:41 PM   #20
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Quote:
Originally Posted by Jaker
thanks, we will look again this weekend.

OT: HankIII rules!!
- thanks
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Old 04-28-2005, 10:53 PM   #21
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Default Inexpensive T-70 source $4.70/ea

Quote:
Originally Posted by DrD
2004 uses a torx T-70 for the transmission bolt, right? If so - you are going to need one of those...
Boy it was hard to find!!!
Sunex tools carries the t-70 torx that fits 1/2" standard rachect for MSRP $4.70 each. Their part # is 2690S8:
Ph: (864) 834-3182
Now, would anyone help answer some of my posts (under Jerry Xu)??
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Old 04-29-2005, 09:28 PM   #22
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Ok so a place by my house changed my tranny fluid and my rear*diff fluid. I forget what kind they used but I know it was not synthetic they told me before they put it in. I have a '04*WRX and now every time I shift into 5th it grinds???? Is this because of the fluids they used or is it that I need a new tranny from driving to hard?? now its making me think what do you guys think??? it happened right after they did the change and it only does this when I go from 4th to 5th gear. This never happend before.Any help would be great.

Last edited by Blackpantherwrx; 04-29-2005 at 09:42 PM.
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