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Old 04-30-2008, 12:19 PM   #1
Rex_Guy
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Join Date: Oct 2003
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2004 WRX
WRB Cobb Stage 2

Default Tranny fluid ---> Grinds

Yet another thread on tranny and grinding. Did a search but didnt find anything to what I have. At 60k I did the tranny fluid change with Mobil 1 synthetic (Heard its good and others say bad). Anyway since then Ive had a grind going into 1st, also what concerns me more is upshifting into 4th at higher than 2K rmps gives me a fairly decent grind.

Last week I changed the fluid with valvoline 75w90 non-synthetic. Still no change at all.

So I am asking what could be causing the grinding in 4th at > 2K rpms??
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Old 04-30-2008, 01:04 PM   #2
subyduby
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04 wrx 16g'd
silver

Default redline lightweight shockproof...

I had a similair problem getting into 4th gear. I called Andrewtech after double cluthing for months. He said to try Redline Lighweight shockproof gear oil. I put it in and presto, sychros work again. I will say that the oil is not a GL5 rated product, but many people use it anyway. For example it is a big ingredient in the mixture that many members are using, something (cocktail), not sure of the first name. Otherwise I was going to open the tranny up and change some things out for the fix. This, (even if only temporary) has solved my problems for the time being. if the tranny goes i know I did all i could before a rebuild is necessary.

Hope this helps!
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Old 04-30-2008, 01:07 PM   #3
Audiosavvy
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Default

I had the same problem, as well as grinding going into 1st from neutral, and the car did not want to downshift. I added Scotty's Cocktail to the tranny and it's been working smooth as butter for 25k miles.

I tried just Redline at first, and it helped just a tiny bit, not nearly enough, but it may work for you as it did for subyduby
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Old 04-30-2008, 01:35 PM   #4
smurfwrx
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redline works for me. I'll be adding a little motul300 based on andrewtech's recco. for a little bit smoother shifts. < this guy needs shifter bushings
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Old 04-30-2008, 01:38 PM   #5
bluesubie
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Synchros gone bad?

-Dennis
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Old 04-30-2008, 03:35 PM   #6
Rex_Guy
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hmm, well I'm going to have to try scotty's cocktail and see if thats a fix. If not I suppose its off to the dealer to get checked, aka get porked.

Thanks for the help and anymore input would be excellent.
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Old 04-30-2008, 04:39 PM   #7
Audiosavvy
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Quote:
Originally Posted by Rex_Guy View Post
hmm, well I'm going to have to try scotty's cocktail and see if thats a fix. If not I suppose its off to the dealer to get checked, aka get porked.

Thanks for the help and anymore input would be excellent.


I'd be willing to put down a bet saying it will fix your problem and then some. You will be pleasantly surprised
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Old 05-01-2008, 12:16 PM   #8
growling_boxer
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Default

it seemed to take a while for my tranny oil to "settle in." i have no idea why, but when i had my MT fluid changed from factory to Mobil1 at 135,000 it seemed to only get a little better. but then over the next 5000 miles, the grinding completely went away (bad 5th gear grinding from skipping a gear or two into 5th too frequently back when i first got my legacy). i thought i was going to need a tranny rebuild, but in dragging my feet for financial reasons, the problem solved itself.
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Old 05-03-2008, 12:03 AM   #9
mikeythejew
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Mothballed until winter

Thumbs up

cancel

Last edited by mikeythejew; 05-03-2008 at 12:11 AM. Reason: because I'm a retard
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Old 05-03-2008, 03:07 PM   #10
jac04
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..oops, didn't read the part about dumping the M1....

Last edited by jac04; 05-03-2008 at 03:10 PM. Reason: reading comprehension
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Old 06-02-2008, 03:19 PM   #11
Rex_Guy
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WRB Cobb Stage 2

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just to cose out this thread. Put in scotty's cocktail and the tranny is working great!!! All fixed....for now atleast.
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