Welcome to the North American Subaru Impreza Owners Club Saturday July 22, 2017
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
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 10-20-2015, 04:14 PM   #226
Dill-Ag13
Scooby Newbie
 
Member#: 316535
Join Date: Apr 2012
Chapter/Region: TXIC
Location: The Woodlands, TX
Vehicle:
2007 WRX (Sold 2.0i)
Silver

Default

Quote:
Originally Posted by hybrid gti 2 View Post
Seriously you can't drain, undo a few bolts and Hamer a pin out. Replace a few bearings and put it back. Save hundreds for like an hour of work. Ok well have fun writing that check. There is no adjustments to do.
If it's only an hour of work I'll gladly pay someone an hour of labor to do it right...
* Registered users of the site do not see these ads.
Dill-Ag13 is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 10-20-2015, 04:16 PM   #227
hybrid gti 2
Scooby Guru
 
Member#: 67004
Join Date: Jul 2004
Chapter/Region: SCIC
Location: (818) 300k+ ej205 ppg 5mt
Vehicle:
02 vf30 pnp wagon
silver and cf

Default

They will do a full bearing rebuild and charge $800+
hybrid gti 2 is offline   Reply With Quote
Old 10-20-2015, 04:21 PM   #228
Dill-Ag13
Scooby Newbie
 
Member#: 316535
Join Date: Apr 2012
Chapter/Region: TXIC
Location: The Woodlands, TX
Vehicle:
2007 WRX (Sold 2.0i)
Silver

Default

Quote:
Originally Posted by hybrid gti 2 View Post
They will do a full bearing rebuild and charge $800+
Who? The dealership? Parts are $200. Labor, as you said won't be more than a couple of hours.
Dill-Ag13 is offline   Reply With Quote
Old 10-21-2015, 12:50 PM   #229
hybrid gti 2
Scooby Guru
 
Member#: 67004
Join Date: Jul 2004
Chapter/Region: SCIC
Location: (818) 300k+ ej205 ppg 5mt
Vehicle:
02 vf30 pnp wagon
silver and cf

Default

Ok think about this. Your bearings got ground up in the tail housing. It's making noise now, bringing it to your attention that there is a problem. So that metal has to be going some where in your trans. So the shop will tell you. While your here we need to replace all the bearings that were damaged. So your bill just massively grew by hundreds because you didn't find it before other bearings were damaged. You may not hear all the bad bearings. But they were damaged once the other ones started making noise. So the problem with the wrx and sti. The trans is so long. When the torque is put through the tail housing part it tends to flex and put a hard load on those bearings causing bearing flex and damage. It might start off as pitting and crumbles from there. The more torque the more the problem grows.

So if your a reasonable mechanic you might have caught this early. So this thread helps those who are a reasonable mechanic, who caught the problem early. As well have some skill to pull it off. So while this is an easy fix if you have gone to far then your other bearing now have to be replaced. With that being said. This is where things get complicated. As the front t of the trans requires special tools and exact measurements to get this right.

So this might cover trans repairs a. It for those questioning doing this repair. In my case it was a bandaid that gave me another 6 months before the front bearings were finished. So hopefully this will cover many questions people have about trans bearings repairs.

Note if you have a carbon drive shaft this sound will be drastically muffled and you may miss hearing the warning sounds.
hybrid gti 2 is offline   Reply With Quote
Old 01-04-2016, 04:21 PM   #230
adwinistrator
Scooby Newbie
 
Member#: 421504
Join Date: May 2015
Default

I'm dealing with this issue on my '06 Legacy GT. I don't think I'd be able to do this myself, and am unsure of how much damage has occurred, so I'm trying to decide what the best course of action would be...

Backstory

Transmission was rebuilt at 86,000 miles 3 years ago (lost 5th gear). Sold to previous owner at 110,000 miles, I purchased at 125,000 miles 6 months ago.

I had the transmission fluid changed at the beginning on December. Here's a picture of the fluid that came out.

A few weeks later, I heard some speed related scraping noises that went away after a few minutes. My first thought was wheel bearing.

On 12/26, I start hearing a whining noise, like a wheel bearing would make. It changes pitch and intensity as wheel speed increases, no changes on acceleration, deceleration, steering, gear change, or neutral. I was hoping it was a wheel bearing, but the fact that it didn't change when steering had me concerned. Here's a video of the noise.

In the following days, the noise would come back after about 10-15 minutes of driving.

Took the car into my shop on 12/31 and had them check it out, the sound is coming from the center differential. On the way there, the noise didn't seem to come back while I was on the thruway, but when I got on the side roads, I could hear it again. The range and pitch of the noise/speed seems to have changed.


Diagnosing

I'm not sure exactly what is causing this noise. My main guess is the rear bearing on the transfer driver gear (output shaft) of the center differential. A lot of the people with center diff noise say that the noise is only during acceleration or deceleration, but that's not what my problem is.


Decision Time

They recommended that I purchase a used transmission and swap it out. Their rationale is that it's highly unlikely that one bearing is the only issue with the transmission, and that doing the service might end up being a waste of money.

I've been doing a bit of research online, and this seems like a somewhat common issue. People are writing up DIY center differential bearing replacement guides.

LegacyGT.com guide

The only used transmission in the area would cost $1,400, free delivery, 30 day warranty (parts only), and has 114,000 miles. Labor would be about $650.
If it's just the center differential bearings, parts would be about $175, labor about $400.
If the differential's viscous coupling is damaged, the cost would end up around $1,100.
To just open the center differential and see what it looks like would be about $250.

I'm leaning towards having the shop open up the differential and proceed from there. If it looks like there are worse problems then just the bearings, I'll purchase the local transmission, or order one with less miles and pay shipping, then have them install it.


Questions

What would you do if you were in my shoes?

With the noise being consistent with the wheel speed, and not changing depending on other factors, would that lead you to believe that it's the differential bearings, or the differential's viscous coupling? I would think if there's noise on load, that it's the viscous coupling, whereas if the noise happens all the time, it's a bearing.
Thanks in advance for any advice you can give!

Last edited by adwinistrator; 01-04-2016 at 04:42 PM.
adwinistrator is offline   Reply With Quote
Old 01-04-2016, 04:32 PM   #231
hybrid gti 2
Scooby Guru
 
Member#: 67004
Join Date: Jul 2004
Chapter/Region: SCIC
Location: (818) 300k+ ej205 ppg 5mt
Vehicle:
02 vf30 pnp wagon
silver and cf

Default

Could also be the transfer gears. Being I don't see chunks on the drain plug makes me think it's something other then the bearing or you caught it super early.
hybrid gti 2 is offline   Reply With Quote
Old 01-04-2016, 05:51 PM   #232
ride5000
Scooby Guru
 
Member#: 32792
Join Date: Feb 2003
Chapter/Region: NESIC
Location: lincoln, ri
Vehicle:
2003 GGA MBP
12.9 / 105+

Default

how mechanically inclined are you? do you have access to basic tools?

years back i was certain my cdiff/xfer bearings were going out. speed dependent noise, no relation to gear or rpm, not a wheel bearing or cv joint. sounded like it was coming from directly aft of and beneath the shift lever.

bought the replacement bearing set, got the car in the air, removed the tail housing, inspected the transfer gears and...

they were utterly perfect.

so everything got buttoned back up again. then with the car still on jackstands i put it in 5th gear and carefully crawled underneath to listen to where the whine was coming from.

lo and behold it was the snout bearing in the rear diff. just decided to give up the ghost, had done all maintenance over the last decade myself and nothing of note ever.

sourced a rear diff from a guy who went sti for $50 iirc. swapped it in and problem solved. for a **** of a lot less than $2k for a new tranny...
ride5000 is offline   Reply With Quote
Old 01-04-2016, 06:34 PM   #233
Leafy
Scooby Specialist
 
Member#: 330625
Join Date: Aug 2012
Chapter/Region: NESIC
Location: MA
Vehicle:
2006 WRX
WRB

Default

If I were you I'd pull the driveshaft out and check the U joints. I had the exact same noise you describe and I ended up changing the bearings out even though they didnt have any visible issues, since I already opened it up and bought the parts but the drive U joints were shot on my driveshaft.
Leafy is offline   Reply With Quote
Old 01-05-2016, 03:58 PM   #234
my username
Scooby Newbie
 
Member#: 418749
Join Date: Apr 2015
Chapter/Region: SWIC
Location: Albuquerque, NM
Vehicle:
2002 RS
PSM

Default

I was having a similar problem for a while, it was driving me crazy. I recently replaced my U joints and for now it seems to have solved the problem.
my username is offline   Reply With Quote
Old 01-09-2016, 08:37 AM   #235
spoolinsti05
Scooby Guru
 
Member#: 108051
Join Date: Feb 2006
Chapter/Region: Tri-State
Location: NY
Vehicle:
2005 TickingTimeBomb
Jr tuned TT Sleeved

Default Help with Center Diff Transfer Drive Gear Bearing R&R

Quote:
Originally Posted by ride5000 View Post

lo and behold it was the snout bearing in the rear diff.


That would be called the pinion shaft bearing my friend. Just for those who would prefer to repair the part rather then replace it with the risk of getting another failure.
spoolinsti05 is offline   Reply With Quote
Old 01-09-2016, 09:49 AM   #236
ride5000
Scooby Guru
 
Member#: 32792
Join Date: Feb 2003
Chapter/Region: NESIC
Location: lincoln, ri
Vehicle:
2003 GGA MBP
12.9 / 105+

Default

Quote:
Originally Posted by spoolinsti05 View Post
That would be called the pinion shaft bearing my friend. Just for those who would prefer to repair the part rather then replace it with the risk of getting another failure.
lol

I guess when you "repair" things they never fail again?

that 50 bucks was some of the best money i've ever spent, my friend.
ride5000 is offline   Reply With Quote
Old 01-09-2016, 04:07 PM   #237
spoolinsti05
Scooby Guru
 
Member#: 108051
Join Date: Feb 2006
Chapter/Region: Tri-State
Location: NY
Vehicle:
2005 TickingTimeBomb
Jr tuned TT Sleeved

Default

Quote:
Originally Posted by ride5000 View Post
lol

I guess when you "repair" things they never fail again?

that 50 bucks was some of the best money i've ever spent, my friend.

I'm just giving you isht like you do to me lol just in a more logical way
spoolinsti05 is offline   Reply With Quote
Old 01-20-2016, 08:22 PM   #238
point78
Scooby Specialist
 
Member#: 344329
Join Date: Jan 2013
Location: Summit County
Vehicle:
2008 Wrx, 6mt

Default

Finally got around to pulling the tail shaft off my 2004 6mt, and replaced the 4 bearings I could get to.

Its winter storming out, and traffic was creeping along at 20 MPH, so I couldn't really get a good test run. at least it still shifts haha.

It was all pretty straight forward, except for those two 1/2 needle/roller bearings that sit on the center diffs shaft-UGH-what a pain sliding the tail shaft back on with those things popping off every time. Finally it just popped on, wonder if they just fell off-hope not.

I don't ever want to do that again, just because of those two 1/2 bearings… 9 hours total.
point78 is offline   Reply With Quote
Old 01-20-2016, 10:10 PM   #239
spoolinsti05
Scooby Guru
 
Member#: 108051
Join Date: Feb 2006
Chapter/Region: Tri-State
Location: NY
Vehicle:
2005 TickingTimeBomb
Jr tuned TT Sleeved

Default

Use a tacky assembly lube like Lucas they'll stay in place better.
spoolinsti05 is offline   Reply With Quote
Old 01-21-2016, 07:05 AM   #240
point78
Scooby Specialist
 
Member#: 344329
Join Date: Jan 2013
Location: Summit County
Vehicle:
2008 Wrx, 6mt

Default

Quote:
Originally Posted by spoolinsti05 View Post
Use a tacky assembly lube like Lucas they'll stay in place better.
I was thinking that would be the way to go. I used some grease I had handy(i found my assembly lube while putting everything away afterwards, figures), but it mixed with the tranny fluid that was still in the area(I put some on the bearings before install) and lost its "stickiness". I cleaned it all back off and it did seem to stick better then.

Drove it around a bit more on the highway. I had a bearing noise/growl on deceleration with any level of center diff lock. It appears to be gone now
point78 is offline   Reply With Quote
Old 02-21-2016, 12:20 PM   #241
mtg
Scooby Newbie
 
Member#: 140297
Join Date: Feb 2007
Chapter/Region: RMIC
Location: Denver, CO
Vehicle:
'07 2.5i Wagon 5MT
Crystal Gray Metallic

Default Here we go again

I had this issue just about exactly two years ago @100k miles, fixed it, and now @120k miles, the whining is back.

I think I noticed a pattern in what has accelerated the wear, based on the timing of both times the whining started. Has anybody else picked up on a pattern or know the root cause?
mtg is offline   Reply With Quote
Old 02-21-2016, 12:53 PM   #242
hybrid gti 2
Scooby Guru
 
Member#: 67004
Join Date: Jul 2004
Chapter/Region: SCIC
Location: (818) 300k+ ej205 ppg 5mt
Vehicle:
02 vf30 pnp wagon
silver and cf

Default

Root of the problem is 3 things. 1, to much power going through it. 2, you have metal shavings in the trans still. Or 3 you did something to the bearings when installing.
hybrid gti 2 is offline   Reply With Quote
Old 02-21-2016, 11:11 PM   #243
mtg
Scooby Newbie
 
Member#: 140297
Join Date: Feb 2007
Chapter/Region: RMIC
Location: Denver, CO
Vehicle:
'07 2.5i Wagon 5MT
Crystal Gray Metallic

Default

Quote:
Originally Posted by hybrid gti 2 View Post
Root of the problem is 3 things. 1, to much power going through it. 2, you have metal shavings in the trans still. Or 3 you did something to the bearings when installing.
It's certainly not too much power, my car is a stock '07 2.5i....at high elevation.

Incorrect installation is certainly a possibility, but I took my time to do it to the best of my skill. The design is known to do this, so there's likely to be something other than (or in addition to) a mistake of mine at play.

The pattern I noticed is cold weather. A couple years ago, my driving patterns changed to include parking outside, and my drive home from work includes an interstate entrance ramp about 100 feet from my office. The whine is worst when transmission is cold, so it seems either as the parts expand, or as the oil thins and reaches the back of the trans easier, the noise reduces. I'm wondering if anybody else has noticed a similar trend.
mtg is offline   Reply With Quote
Old 04-12-2016, 11:25 PM   #244
mtg
Scooby Newbie
 
Member#: 140297
Join Date: Feb 2007
Chapter/Region: RMIC
Location: Denver, CO
Vehicle:
'07 2.5i Wagon 5MT
Crystal Gray Metallic

Default

I'm getting ready to replace my bearings for the second time and want to verify the shim thickness needed. Last time, whatever was in there from the factory went back in there.

Does anybody know what to measure and what the spec is supposed to be to determine shim thickness?
mtg is offline   Reply With Quote
Old 04-17-2016, 01:06 AM   #245
mtg
Scooby Newbie
 
Member#: 140297
Join Date: Feb 2007
Chapter/Region: RMIC
Location: Denver, CO
Vehicle:
'07 2.5i Wagon 5MT
Crystal Gray Metallic

Default

Quote:
Originally Posted by mtg View Post
I'm getting ready to replace my bearings for the second time and want to verify the shim thickness needed. Last time, whatever was in there from the factory went back in there.

Does anybody know what to measure and what the spec is supposed to be to determine shim thickness?
Anybody?
mtg is offline   Reply With Quote
Old 05-07-2016, 11:13 AM   #246
hybrid gti 2
Scooby Guru
 
Member#: 67004
Join Date: Jul 2004
Chapter/Region: SCIC
Location: (818) 300k+ ej205 ppg 5mt
Vehicle:
02 vf30 pnp wagon
silver and cf

Default

Never noticed shims on my 02. But just do it the same way it was before.
hybrid gti 2 is offline   Reply With Quote
Old 05-11-2016, 04:24 PM   #247
ride5000
Scooby Guru
 
Member#: 32792
Join Date: Feb 2003
Chapter/Region: NESIC
Location: lincoln, ri
Vehicle:
2003 GGA MBP
12.9 / 105+

Default

Quote:
Originally Posted by mtg View Post
Anybody?
it's detailed in the FSM.
ride5000 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
NEED: Center Diff/Transfer Case MyRuRex Private 'Wanted' Classifieds 8 08-26-2015 08:22 PM
WTB: center diff / transfer case for my 98 2.5RS MR2fanatic Private 'Wanted' Classifieds 1 10-01-2009 12:52 AM
FS: IN: 04 STi 6 Speed With Center Diff And Rear Diff STiGuy46554 Drivetrain 5 09-20-2008 12:10 PM
For sale 02 WRX tranny case,center diff and drive gears felixwankel88 Drivetrain 2 06-06-2007 06:22 PM
Bearing preload for center diff transfer gears. 340Duster Transmission (AT/MT) & Driveline 2 05-21-2007 04:24 PM

All times are GMT -4. The time now is 11:37 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2017 Axivo Inc.
Copyright ©1999 - 2017, North American Subaru Impreza Owners Club, Inc.