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Old 08-04-2009, 06:04 PM   #1
WheelieMonster
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Default shifting into 4th gear issues

Recently I have been having a issue while shifting only into 4th gear...it will shift fine into 4th for about 15min but after it gets warmed up it grinds (like its goin into 4th hard) when going into the gear from 3rd to 4th but not from 5th to 4th...if i shift super slow letting my rpms get all the way down it wont grind sometimes...does anyone have any ideas of what might be causing this?
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Old 08-04-2009, 06:06 PM   #2
alexmartynyuk
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Worn out synchros maybe?
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Old 08-04-2009, 06:08 PM   #3
WheelieMonster
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how big of issue might this be to have fixed?..should i trust a local guy that does good work or go to a dealer?
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Old 08-04-2009, 06:09 PM   #4
seanathanq83
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syncros, i am having the same problem, i went and put plain coastal 80/90 gear oil and it went away for a little while, about 5k, i am going to redo it and see, have been contemplating putting some of the redline lightweight or whatever it is they call it
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Old 08-04-2009, 06:10 PM   #5
seanathanq83
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you could prbably buy a new tranny for the price someone would charge you now days 5 speeds are cheap, and syncros normaly are not to much but you might as well do all of them while you are in there
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Old 08-04-2009, 06:10 PM   #6
WheelieMonster
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i had a bad feeling thats what was going on..how much r the redline syncros your talkin about?
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Old 08-04-2009, 06:12 PM   #7
ej_trbo_si_eater
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use thicker non synthetic gear oil or just wait an extra half to 3/4 seconds to put it into gear.. double clutching helps you to wait.. i have the same problem its just that the gear ratios from third to 4th are such a big difference... best solution- DOGBOX
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Old 08-04-2009, 06:14 PM   #8
ej_trbo_si_eater
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an the sychros for just fifth an reverse were somethin ridiculous like 280 at cost from the dealership.. oh an by the way dont go to the dealership they would rather put a new trans in it or charge you an unbelievable amount of money .. find somebody local or do it urself theres a thread on here somewhere on how to do it iv done it its reall not all that hard
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Old 08-04-2009, 06:34 PM   #9
solidace46
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I have the same exact problem you do, if it bothers you that bad, shift into fifth first, then back down into fourth and it won't give you problems. At least that works on mine, but mine has been doing it for about a year so I know how to shift into it perfectly fine, just gotta be slow and easy with it and its fine. I just dont wanna fork up a couple hundred if I don't need to
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Old 08-04-2009, 06:37 PM   #10
Haelan
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I thought my 4th gear synchro was dead. I used a transmission cocktail available at Grimmspeed and not only did it clear up all my grinding...I can shift into 1st gear rolling at 20 mph.

Needless to say I am happy as hell
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Old 08-04-2009, 06:52 PM   #11
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I had the same exact problem. Grinding on the 3>4 upshift when the fluid warmed up and thinned out.

I kinda wonder what kind of oil you using? I was using Redline 75W90NS and it worked OK for a while, but I won't use it again since better options are available.

I've come to learn Subaru transmissions break down their fluid rather quickly as some owners are changing tranny oil at 10,000 miles.

Anyway after researching doing a rebuild on the tranny I came across some useful info. If you use Swepco 201 80W90 or Subaru Extra S 75W90 chances are the tranny will go back to shifting like a dream. As I said I had the same exact problem. A few weeks ago I changed out to the Swepco oil.

IT'S AWESOME!!!

Today for instance I took a spirited drive. The car shifts better than it ever has. At high RPM I can upshift instantly. Downshifting has become easier too even with double-clutching.
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Old 08-04-2009, 06:57 PM   #12
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I had grinding issues going from neutral to 1st, and then from 3rd to 4th, especially when shifting fast at the track. New fluids cured that problem.
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Old 08-04-2009, 11:49 PM   #13
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thanks for the help..i think i am goin to train the fluid and try the transmission cocktail at Grimmspeed and hope that cures my problem..this will be the first time changing it since i bought the car about 10000 miles ago..whats the best way to do it..any tips or tricks i should know about?
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Old 08-05-2009, 12:12 AM   #14
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do i use all of the fluids they have together for the cocktail?


Quote:
Originally Posted by Haelan View Post
I thought my 4th gear synchro was dead. I used a transmission cocktail available at Grimmspeed and not only did it clear up all my grinding...I can shift into 1st gear rolling at 20 mph.

Needless to say I am happy as hell
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Old 08-05-2009, 07:54 AM   #15
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Quote:
Originally Posted by WheelieMonster View Post
thanks for the help..i think i am goin to train the fluid and try the transmission cocktail at Grimmspeed and hope that cures my problem..this will be the first time changing it since i bought the car about 10000 miles ago..whats the best way to do it..any tips or tricks i should know about?
http://www.scoobymods.com/manual_tra...43.html?t=1743

You'll probably get ~12K-15K out of the cocktail before you start getting a grind on 4th again. It worked great for me, but I wanted a fluid that I could get more life out of, so I tried Extra-S and it's heavenly.
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Old 08-05-2009, 08:33 AM   #16
Haelan
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Quote:
Originally Posted by WheelieMonster View Post
do i use all of the fluids they have together for the cocktail?
Yes, mix them all in a large container. Drain your existing fluid. Put drain plug back in. Get a long funnel and fill through the transmission dip stick hole. Pour it SLOWLY or your new fluid is going to gargle and splash all over the place.
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Old 08-05-2009, 02:14 PM   #17
SubySal
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Quote:
Originally Posted by Spenk View Post
http://www.scoobymods.com/manual_tra...43.html?t=1743

You'll probably get ~12K-15K out of the cocktail before you start getting a grind on 4th again. It worked great for me, but I wanted a fluid that I could get more life out of, so I tried Extra-S and it's heavenly.
"Heavenly", "Liquid gold"...seems to be the concensus on Extra S. I figure I'll go to 20-25,000 with the Swepco unless the tranny starts acting up first. Depending on how the Swepco performs I may try Extra S next change. This time around Swepco was easier to get.

FWIW I'm not a big fan of cocktails. Results have been mixed at best from "this stuff is awesome" to "my transmission now needs a rebuild".
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Old 08-05-2009, 02:19 PM   #18
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I continually recommend 3-quarts of Redline Lightweight Shockproof and 1-quart of Motul Gear300-75W90.

The only complaints I've ever gotten about this mixture are from people who had literally broken synchros. No fluid will fix that.

Phil
Andrewtech Automotive
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Old 08-12-2009, 12:00 AM   #19
WheelieMonster
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u have changed my mind on the cocktail and think im goin to go with the "extra s" but can i get this at a parts store or is it somethin i need to order online?..a a 2002 is 3.6 quarts rite?
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Old 08-12-2009, 05:09 AM   #20
SubySal
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Extra S is available from Subaru, but only in 5 gallon (20L) drums that go for about $150-170 (like this).

However some Suby sites online have started to sell it by the quart out of said drums. This shop for example... http://www.fredbeansparts.com/servle...ra-S%22/Detail
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Old 08-15-2009, 11:29 PM   #21
subbie37
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i have the same problem. shift from 3rd to nuetral then to 4th. its stops the grind
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Old 08-17-2009, 03:52 PM   #22
reyrey
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i have that same prob and i wanna do an sti tranny swap but too pricey so i plan to rebuild wid double syncros and harder gears
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