Welcome to the North American Subaru Impreza Owners Club Friday August 22, 2014
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 Technical > Transmission (AT/MT) & Driveline

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 04-12-2004, 09:30 AM   #1
powerlabs
Scooby Specialist
 
Member#: 45790
Join Date: Oct 2003
Chapter/Region: Tri-State
Location: New Jersey
Vehicle:
2006 Corvette C6 Z51
SUPERCHARGED

Default Short throw shifter buzzing / 5th gear drops out by itself. Can someone help please?

I have a short throw shifter on my 1999 Impreza 2.5RS; Since I got the car at 58000miles I've noticed that the shifter vibrates very hard at high RPMs on certain gears. This vibration makes a really loud buzzing sound that is extremely annoying. It will stop if I hold the shifter, so I know that the buzzing is caused entirely by it vibrating. I had the dealership replace my shifter bushing by a hard polyurethane bushing and that did not help the problem at all. Lately (I'm at 61000 miles now) it buzzes on all gears, even at 4000RPM. Now this weekend, comming back from a 300 mile trip, 5th gear popped out by itself 4 times. I would be on cruise control at 80MPH and the gear would simply pop out and the cc would redline the engine trying to maintain speed while the car was in neutral. Or 2 other times it popped out when I lifted my foot from the gas or when I hit the brake hard after cruising for half an hour or so. These issues are making me very frustrated with the car. I had the dealer replace my clutch (it was shot) and the shifter bushing and I had them take another look at the buzzing problem and it never got fixed. Now I am thinking about replacing the transmition mount by a harder one (Cobb or STI). Would that help? Is the car dropping out of 5th because of this buzzing problem or is that something unrelated?
Any help on this is highly appreciated!
Thanks in advance.
* Registered users of the site do not see these ads.
powerlabs is offline   Reply With Quote
Old 04-12-2004, 10:33 AM   #2
DrMSH
Scooby Newbie
 
Member#: 59379
Join Date: Apr 2004
Default

anytime a gear pops out on its own is not a good sign, I'm afraid.. it's worse for reverse and 1st gear, though.. does it grind when you get into 5th gear at all?

btw, if it pops out of gear while you're using your cruise control, quickly tap on the brakes to deactivate the CC to prevent the engine from redlining..
DrMSH is offline   Reply With Quote
Old 04-12-2004, 11:12 AM   #3
powerlabs
Scooby Specialist
 
Member#: 45790
Join Date: Oct 2003
Chapter/Region: Tri-State
Location: New Jersey
Vehicle:
2006 Corvette C6 Z51
SUPERCHARGED

Default

None of the gears seem to grind at all. 1st gear whines and is difficult to get into when the car is moving but it seems like this is a standart thing for Subarus. Otherwise the car shifts smoothly. I am thinking the shifter vibration/buzzing might be strong enough to be popping it out, but it seems to pop out even when the shifter isn't vibrating too much, so I'm not sure...
Another thing I noticed is that the shifter moves a lot; if I mash on the throttle I can see it move forward by about 1/2 an inch. If I pull my foot off the gas it will move back by 1/2 an inch. I think all this play in the shifter is what allows it to vibrate and buzz when the engine is reving fast (on or off throttle). This is the reasoning behing my suggestion that a harder transmition mount may help, although I am really not sure here, thus my asking you for help

Quote:
btw, if it pops out of gear while you're using your cruise control, quickly tap on the brakes to deactivate the CC to prevent the engine from redlining..
Yeah, or push the clutch, or hit the CC button... That's what I was doing, but I think the idea here is that it *shouldn't* pop out of gear Also most times it popped out I didn't realize it untill the engine was bouncing on the redline!
powerlabs is offline   Reply With Quote
Old 04-14-2004, 12:37 PM   #4
RB5 Clone
Scooby Specialist
 
Member#: 30909
Join Date: Dec 2002
Chapter/Region: NESIC
Location: lastditchracing.net & 03 STI
Vehicle:
RA East Open Class
Champs 07-08-09

Exclamation check trans mounts

mu 00 RS has started doing same thing recently. pops out of 5th, sometimes in cruise mode, other times when lifting off gas in 5th, sometimes just pops out as if by dark magic.

check your transmission mounts. if they are worn, loose, or both, the trans will pop out of 5th without warning.

simple check: get car up on jackstands or lift. take a big prybar and lever up/down between trans housing and the trans corssmembers. if the transaxle moves more than about a quarter inch, you got shot mounts (or loose bolts)

tighten all bolts around trans x-members, also look at the rubber bushings between xmembers and the trans and body. these wear out, esp if they get greasy or oily and are softened up. replacing these is reasonably easy if you're mechanically inclined, otherwise have a dealer do it.

another warning sign of loose trans mounts is that the clutch will shudder when taking off in 1st gear and/or sometimes in other gears as well. You may also get an awful CLUNK when you take up on clutch after a fast downshift.

Good luck, if it's not loose trans mounts or worn busings, it may be that your gearbox is toast.

cheers,

Dave G
Serial Scooby Thrasher and Gearbox Torture Tester
Last Ditch Racing
RB5 Clone is offline   Reply With Quote
Old 04-14-2004, 01:15 PM   #5
North Ursalia
Miss You Mom
Oct 1940 - Feb 2008

Super Moderator
 
Member#: 809
Join Date: Jan 2000
Chapter/Region: NESIC
Location: NH, Land Of Many Trees
Vehicle:
2000 2.5 RS, '14 For
92 5MT SVX

Default

Search for "main shaft nut" and my name. There is a TSB on the main shaft nut loosening. My 5th gear used to pop out because of this.


Brian

North Ursalia is offline   Reply With Quote
Old 04-14-2004, 06:52 PM   #6
powerlabs
Scooby Specialist
 
Member#: 45790
Join Date: Oct 2003
Chapter/Region: Tri-State
Location: New Jersey
Vehicle:
2006 Corvette C6 Z51
SUPERCHARGED

Default

Thank you RB5 Clone, you gave me hope I am going to replace the transmission mount with a harder one and have everything re-tightened and report back on what happens.
North Ursalia; The only post containing main shaft nut and your name is this one and another one where you also ask the reader to search
Would you mind elaborating please?
I really hope its not my tranny
Is there any difference between the hardned mounts Cobb sells and STI mounts?
powerlabs is offline   Reply With Quote
Old 04-14-2004, 09:51 PM   #7
Supraru
Scooby Specialist
 
Member#: 23313
Join Date: Aug 2002
Location: Collegeville,Pa
Vehicle:
99' 2.5Rs
black

Default

I had this problem. Then one day on the highway I was in 5th and it poped out, usually i would just put it in 4th and continue but this time I just tried to put it back in 5th. Well I got a totally different grinding noise then if you messed up a shift so I tried to put it into 4th and got the same. Tried once more to put it into 5ht and it did it again. I then put it into 3rd then 4th and it was fine. When I got home I tried to reverse and I couldn't put it in. Took it to the dealer and they fixe it. Now I'm getting a small grind at mid rpm in 4th. I hope that doesn't happen to you.
Supraru is offline   Reply With Quote
Old 04-14-2004, 10:18 PM   #8
North Ursalia
Miss You Mom
Oct 1940 - Feb 2008

Super Moderator
 
Member#: 809
Join Date: Jan 2000
Chapter/Region: NESIC
Location: NH, Land Of Many Trees
Vehicle:
2000 2.5 RS, '14 For
92 5MT SVX

Default

http://forums.nasioc.com/forums/show...main+shaft+nut

and

http://forums.nasioc.com/forums/show...highlight=gear

and most importantly

http://forums.nasioc.com/forums/show...main+shaft+nut

The TSB number is 03-48-99 from July 1999, though I didn't know that at the time of any of those posts . Your dealership should know about it without the number anyway.


Brian

North Ursalia is offline   Reply With Quote
Old 04-15-2004, 11:39 PM   #9
twizzstyle
Scooby Guru
 
Member#: 18941
Join Date: May 2002
Chapter/Region: NWIC
Location: Kenmore, Washington
Vehicle:
2005 Lotus Elise
Orange

Default

as far as the buzzing, your shifter probably has ball bearing bushings on the shifter itself. Mine had that, and at certain RPMs would start rattling like crazy, drove me nuts. So I drill out the bearings, and put the stock bushings in their place, works like a charm now!

No idea about the popping out of gear though
twizzstyle 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

Similar Threads
Thread Thread Starter Forum Replies Last Post
Factory Short-throw Shifter and downshifting from 4th to 3rd gear.. wrxfx Newbies & FAQs 29 08-13-2004 02:13 PM
WTB: STi Short Throw Shifter or Cobb Double Adjustable Short Throw Shifter rich22 Private 'Wanted' Classifieds 8 05-05-2004 03:27 AM
Can someone HELP..PLEASE.. WRX-U Mid Atlantic Impreza Club -- MAIC 11 02-10-2003 05:51 PM
How can I tell if I have the short-throw shifter? rharder General Community 3 07-18-2002 10:06 AM
Kartboy Short Throw Shifter Can Wait Psi-Fire Transmission (AT/MT) & Driveline 12 08-12-2001 03:20 PM


All times are GMT -4. The time now is 04:52 PM.


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