Welcome to the North American Subaru Impreza Owners Club Saturday April 25, 2015
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Here you can view your subscribed threads, work with private messages and edit your profile and preferences Home Registration is free! Visit the NASIOC Store NASIOC Rules Search Find other members Frequently Asked Questions Calendar Archive NASIOC Upgrade Garage Logout
Go Back   NASIOC > NASIOC General > Newbies & FAQs

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads.
Reply
 
Thread Tools Display Modes
Old 03-03-2015, 12:48 AM   #1
kctqnoah
Scooby Newbie
 
Member#: 411461
Join Date: Jan 2015
Vehicle:
2004 Subaru WRX

Default PLEASE HELP! 4th gear grind!

Hello everyone!! I recently picked up a stage 2 04 wrx about a month ago, and so far it has been the best purchase I have ever made!lots of fun to drive, but I have come into a problem recently. When I purchased the car(has 132k miles) the trans was shifting nice and smooth. No grinds at any rpm or gear, it ran real nice.

The previous owner mentioned I should probably change the tranny fluid, and that is exactly what I did a few weeks ago. I bought some subaru super s and used that to replace my fluid, but ever since I changed it I have been getting a grind going from 3-4 if I am shifting above around 3.4k rpms, or going above 60-65. It will also do it when downshifting from 5-4 on the highway. I looked this up and it seems most people that had this issue were using a cocktail mix, and they would switch to the subaru super s to fix it. But im getting the grind with the subaru fluid. When I checked the drain plug when I changed out the fluid, there were some shavings but no chunks or anything that looked major. Also my 1st gear sometimes seems like i need to force it in to get it in gear when im stopped

Should I try a cocktail mix to see if this fixes the grind?? It only grinds in fourth gear, no where else. I do live in NH so it has been a pretty cold winter(0-35 degrees) but it seems like it shifts smoother when the tranny is cold, and gets worse as it warms up. I was thinking about trying the grimmspeed mix (redline shockproof, penzoil synchromesh and castrol hypoy c) but any input would me much appreciated. Thanks!
* Registered users of the site do not see these ads.
kctqnoah is offline   Reply With Quote
Old 03-03-2015, 06:35 AM   #2
HinshawWRX
Medium Frank
Moderator
 
Member#: 140114
Join Date: Feb 2007
Chapter/Region: MAIC
Location: Common Sense, VA
Vehicle:
2014 Porsche
GT3 (Currently on Fire)

Default

I would verify you have enough fluid in it.
HinshawWRX is offline   Reply With Quote
Old 03-03-2015, 06:50 AM   #3
Jack
Add Lightness
Moderator
 
Member#: 13699
Join Date: Dec 2001
Chapter/Region: NESIC
Location: Hopkinton, MA
Vehicle:
2007 Lotus Elise
(From General)

Default

I expect it has a billion miles on it. Synchros do wear out. Learn how to double clutch. That will help a lot. On top of that, stop downshifting.
Jack is offline   Reply With Quote
Old 03-03-2015, 09:08 AM   #4
Stealthfish
Scooby Specialist
 
Member#: 392920
Join Date: Jun 2014
Chapter/Region: TXIC
Location: Houston, TX
Vehicle:
2015 WRX STi
Lightning Red

Default

Quote:
Originally Posted by Jack View Post
... Synchros do wear out. Learn how to double clutch. That will help a lot. On top of that, stop downshifting.
This is exactly what I would recommend. Just stop downshifting if necessary. My 2004 WRX first gear syncro was worn to the point where I had to put it in second prior to going into first gear at stop lights. It had 140K miles when that had started happening. Syncros do wear (wear and tear) over time. Learning to rev match and double clutch would also help. Is this your first manual transmission vehicle as well?
Stealthfish is offline   Reply With Quote
Old 03-03-2015, 12:28 PM   #5
kctqnoah
Scooby Newbie
 
Member#: 411461
Join Date: Jan 2015
Vehicle:
2004 Subaru WRX

Default

Quote:
Originally Posted by Stealthfish View Post
This is exactly what I would recommend. Just stop downshifting if necessary. My 2004 WRX first gear syncro was worn to the point where I had to put it in second prior to going into first gear at stop lights. It had 140K miles when that had started happening. Syncros do wear (wear and tear) over time. Learning to rev match and double clutch would also help. Is this your first manual transmission vehicle as well?
No this is not my first manual. Im pretty good at my downshifts and double clutches, but it did not make any kind of grinds until i changed it out with new super s. And it seems like I have to do the second then first at a stop light more and more, just going into first seems like i need to force it in
kctqnoah is offline   Reply With Quote
Old 03-03-2015, 12:29 PM   #6
kctqnoah
Scooby Newbie
 
Member#: 411461
Join Date: Jan 2015
Vehicle:
2004 Subaru WRX

Default

Quote:
Originally Posted by Jack View Post
I expect it has a billion miles on it. Synchros do wear out. Learn how to double clutch. That will help a lot. On top of that, stop downshifting.
It has 132k miles. I have been double clutching, but even when I double clutch going from 5-4 it still grinds. It dosent when I do it going from 3-4 which is kind of confusing
kctqnoah is offline   Reply With Quote
Old 03-03-2015, 12:29 PM   #7
kctqnoah
Scooby Newbie
 
Member#: 411461
Join Date: Jan 2015
Vehicle:
2004 Subaru WRX

Default

Quote:
Originally Posted by HinshawWRX View Post
I would verify you have enough fluid in it.
It is actually just a tad over the full line, so i don't think the fluid level would be the issue
kctqnoah is offline   Reply With Quote
Old 03-03-2015, 10:36 PM   #8
BugeyeMe
Scooby Newbie
 
Member#: 415039
Join Date: Mar 2015
Chapter/Region: E. Canada
Location: Toronto,Canada
Vehicle:
2002 WRX
World Rally Blue

Default

May be a clutch problem
BugeyeMe is offline   Reply With Quote
Old 03-04-2015, 01:02 AM   #9
kctqnoah
Scooby Newbie
 
Member#: 411461
Join Date: Jan 2015
Vehicle:
2004 Subaru WRX

Default

Quote:
Originally Posted by BugeyeMe View Post
May be a clutch problem
if it was a clutch problem wouldnt it do it in all gears? It an exedy stage 2 racing clutch, no slip at all
kctqnoah is offline   Reply With Quote
Old 03-04-2015, 02:05 AM   #10
Scary
NASIOC Supporter
 
Member#: 362063
Join Date: Jul 2013
Chapter/Region: SWIC
Default

I would drain and refill with Uncle Scotty's v3 Cocktail. Fixed all the little sync issues I had.

http://forums.nasioc.com/forums/show...tty+s+cocktail
Scary is online now   Reply With Quote
Old 03-04-2015, 02:42 AM   #11
fox0947
Scooby Newbie
 
Member#: 386350
Join Date: Mar 2014
Location: Florida
Vehicle:
2000 impreza L
red

Default

Had the same problem on my 00 impreza, except it grinded from 2-3, but not 3-4 Also had the problem of it not wanting to go into first when stopped. Turned out the 3-4 shifter fork broke and the piece from the shifter fork was jamming 1st. So i bought a 2004 wrx transmission with a bad center diff for 150, swapped everything from the 04 transmission(all shift forks, front diff, and the two gear shafts)into my 2000 case and used my center diff and now it shifts perfect. Crack the trans open and see whatca got! Fix it now before it becomes a bigger problem

Sent from my SM-G900T using NASIOC mobile app
fox0947 is offline   Reply With Quote
Old 03-04-2015, 06:18 PM   #12
Mikevar94
Scooby Newbie
 
Member#: 388535
Join Date: Apr 2014
Chapter/Region: NESIC
Location: Waterbury CT
Vehicle:
2008 WRX
Red

Default

I would try another fluid or a mix perhaps. I had this same issue with 4th but then I put in subaru extra s (they switch the name to super s) and it completely got rid of the grind. Idk if the super s is any different then extra s but it def seems like its the fluid causing this.
Mikevar94 is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -4. The time now is 03:21 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2015 Axivo Inc.
Copyright ©1999 - 2014, North American Subaru Impreza Owners Club, Inc.