Welcome to the North American Subaru Impreza Owners Club Thursday September 19, 2019
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Go Back   NASIOC > NASIOC General > General Community

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 08-24-2019, 05:27 PM   #1
Tango44
Scooby Newbie
 
Member#: 392556
Join Date: Jun 2014
Default Need some advice

I have an 04 Sti that I love with all my heart. It is my dream car. 145k miles. Car is payed off.

I recently had service done to reseal my rear diff, and now it drives like **** when turning at low speeds. I am told my center diff is going out because the rear diff is working better now? I am told it needs replacing.

Questions
1. Does that make any sense to anyone with more mechanical knowledge than me? It may just be coincidence but I am finding it hard to believe that the work they did on my rear diff isnt causing this issue.

2. I keep pouring thousands of dollars into this 04 because I love the model, but I am worried it will be never ending repairs on top of finding parts that are no longer made. On top of that I have already put like 10k into repairs. Should I just bite the bullet and get something new? I am not that big of a fan of the new models.

3. The car currently drives like ****, shuddering and clacking noises coming from the diff at low speeds, I think it will be hard to sell with that going on. Should I replace the center diff and then sell? At that point I feel like I might as well just keep driving it and repairing it.

Things I have replaced on the 04 in last few years.

- Engine bottom block
- Headers
- belts and hoses / general upkeep
* Registered users of the site do not see these ads.

Last edited by Tango44; 08-24-2019 at 06:41 PM.
Tango44 is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 08-24-2019, 07:03 PM   #2
Blktrax
Scooby Specialist
 
Member#: 220971
Join Date: Aug 2009
Chapter/Region: South East
Location: West, NC
Vehicle:
2002 WRX 223K Mi.

Default

Need some more info here...

1) what was resealed? specific parts
2) was this immediately apparent after this work
3) what else was done at this same time.

Most likely probability is the place doing the repair (besides just mucking the job up) didnt use the correct oil. The R180 in the STi has a True Limited Slip Diff and requires an oil with the proper friction Modifier to lubricate it. Without that it will have a ratcheting/clunking feeling when turning. Similar to setting the DCCD to Manual and Full Lock and turning. (it don't sound or feel good)


Last edited by Blktrax; 08-24-2019 at 07:12 PM.
Blktrax is offline   Reply With Quote
Old 08-24-2019, 07:28 PM   #3
Tango44
Scooby Newbie
 
Member#: 392556
Join Date: Jun 2014
Default

Issue - Rear diff is leaking from rear cover and side seals - recommend resealing rear diff.

Service performed-
replace diff side seals and o-rings
replace side seals and o-rings (both sides)
rear axle seal

I also had them flush the power steering and brake fluids.

On the notes it says 80/90 gear oil, not sure if that is the type or what. This location is on the Nasioc list of service locations. They only work on subarus and plenty of STis so I would hope they know which oil to use. Do you know what is the correct oil? I can ask them, it does feel and sound like the locked diff in DccD manual mode so that checks out.

Additional information- On the drive home after picking up the car I noticed shaking when turning at low speeds, brought it in the next day and they said my center diff needed replacing. Now when I drive it I hear clacking noises along with the shuddering when turning at low speeds. It feels and sounds awful. Something is seriously messed up and this wasnt happening at all until they serviced it.

Last edited by Tango44; 08-24-2019 at 07:33 PM.
Tango44 is offline   Reply With Quote
Old 08-24-2019, 07:37 PM   #4
Blktrax
Scooby Specialist
 
Member#: 220971
Join Date: Aug 2009
Chapter/Region: South East
Location: West, NC
Vehicle:
2002 WRX 223K Mi.

Default

The wrong fluid would certainly cause issues , but if they replaced the axle seals and o-rings , they could have botched the job and messed up the diff bearing preload.

If it doesnít howel, or groan at highway speeds on/off throttle, itís likely wrong fluid. If there are other noises, they borked the diff.
Blktrax is offline   Reply With Quote
Old 08-24-2019, 08:26 PM   #5
Tango44
Scooby Newbie
 
Member#: 392556
Join Date: Jun 2014
Default

No issues other than turning at low speeds. I just saw your picture, 80/90 gear oil is what they used according to the service report so I think we can cross that off.

Last edited by Tango44; 08-24-2019 at 08:35 PM.
Tango44 is offline   Reply With Quote
Old 08-24-2019, 08:29 PM   #6
Blktrax
Scooby Specialist
 
Member#: 220971
Join Date: Aug 2009
Chapter/Region: South East
Location: West, NC
Vehicle:
2002 WRX 223K Mi.

Default

Quote:
Originally Posted by Tango44 View Post
No issues other than turning at low speeds. Do you know or know how I can find out which oil was supposed to be used?
The back of the owners manual.
Blktrax is offline   Reply With Quote
Old 08-24-2019, 08:59 PM   #7
Tango44
Scooby Newbie
 
Member#: 392556
Join Date: Jun 2014
Default

80/90 gear oil is what was used so I dont think that is the issue. Any other ideas?
Tango44 is offline   Reply With Quote
Old 08-24-2019, 09:33 PM   #8
WRXnick16
Scooby Newbie
 
Member#: 447898
Join Date: May 2016
Chapter/Region: BAIC
Location: W Sac, CA
Vehicle:
2016 WRX (traded)
2019 STI CWP

Default

Quote:
Originally Posted by Tango44 View Post
On the drive home after picking up the car I noticed shaking when turning at low speeds, brought it in the next day and they said my center diff needed replacing. Now when I drive it I hear clacking noises along with the shuddering when turning at low speeds. It feels and sounds awful. Something is seriously messed up and this wasn't happening at all until they serviced it.
Can you tell if the noise is coming from the center of the car (under your seat) or from the rear of the car?

Did you happen to keep track of the mileage before and after you took the car in for service?

Quote:
Originally Posted by Blktrax View Post
The R180 in the STi has a True Limited Slip Diff and requires an oil with the proper friction Modifier to lubricate it. Without that it will have a ratcheting/clunking feeling when turning.
Agreed.

Did Subaru do the work?

I'm assuming not because the "we fixed the seals so now the diff is working better and going out" response is a bit shady. It seems that the shop has no intention of taking responsibility and fixing the problem.. whether it's just the wrong oil or they screwed up the rear differential. If the car is worse after their 'repair' then it's on them to fix it. It's up to you if you want to fight with them or go elsewhere.

You could try asking them which 80W90 oil they used. Make sure the oil has a friction modifier to lubricate the LSD. The OEM oil is strongly recommended. You'll definitely get some strange noises and clunking if they used the wrong fluid.

If they don't provide a straightforward answer then swapping the rear diff oil with the proper fluid is the cheapest/fastest way to rule that out.

If you don't have the mechanical skills/equipment, you may want to find another trusted shop or just take it to Subaru. You could at least get a diagnosis from another shop to see if if it's the center or rear diff.
WRXnick16 is offline   Reply With Quote
Old 08-24-2019, 10:32 PM   #9
Tango44
Scooby Newbie
 
Member#: 392556
Join Date: Jun 2014
Default

The place I take it to is reputable, it's not Subaru but they specialize in subarus so they probably used oem oil. I have an appointment next Thursday with a Subaru dealership to diagnose, we'll see what they say. Thanks for your help guys. While I'm here let's say it actually is just a coincidence and my center diff needs to be replaced. Any thoughts on my other questions about what to do moving forward?
Tango44 is offline   Reply With Quote
Old 08-24-2019, 10:58 PM   #10
jesseisbeast
Scooby Newbie
 
Member#: 465688
Join Date: Apr 2017
Default

If you really love your car, save up money for a down payment on a new car and keep your subi as your project/weekend driver. Do you do any mechanical stuff yourself? If not, I suggest you read the technicals and learn as much as you can about your car so you can work on it yourself when needed. Save yourself some money and headaches of wondering what the hell they did to your car
jesseisbeast is offline   Reply With Quote
Old 08-25-2019, 02:42 PM   #11
Kottonwood
Scooby Newbie
 
Member#: 505652
Join Date: Aug 2019
Default Pay to play

I had to replace my engine at around 100k even with proper maintenance. The mechanic laughed when I said I thought these cars are supposed to be reliable.... definitely pay to play. Super fun to drive though! PS sounds super suspicious for something to start right after got had work done, unfortunately in my experience it's unlikely they'll do much to remedy it. Good mechanics are hard to find... if you want it done right, do it yourself.
Kottonwood is offline   Reply With Quote
Old 08-26-2019, 09:31 PM   #12
Tango44
Scooby Newbie
 
Member#: 392556
Join Date: Jun 2014
Default

Hey guys just wanted to give you an update. I talked to the shop about the gear oil possibly causing the issue. They said it is an additive and that the additive wasn't on my service list so they took the car and flushed the gear oil, added new oil and additive and the problem is totally fixed.

Just want to thank you so much for your help and insight into this problem. I never would have been able to figure this out if it wasn't for you.
Tango44 is offline   Reply With Quote
Old 08-27-2019, 11:00 AM   #13
08redWRX
Scooby Newbie
 
Member#: 186068
Join Date: Aug 2008
Chapter/Region: South East
Location: NC
Vehicle:
2019 STi
DGM

Default

Glad it wasn't anything more serious and they took care of it for you with no issues!
08redWRX 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 09:06 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2019 Axivo Inc.
Copyright ©1999 - 2019, North American Subaru Impreza Owners Club, Inc.