Welcome to the North American Subaru Impreza Owners Club Wednesday December 19, 2018
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Go Back   NASIOC > NASIOC Technical > Service & Maintenance

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 04-20-2018, 07:15 PM   #26
moarboost16
Scooby Newbie
 
Member#: 447202
Join Date: May 2016
Location: Buffalo
Vehicle:
2016 wrx

Default

I did see that, and that's mostly my concern.
* Registered users of the site do not see these ads.
moarboost16 is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 04-21-2018, 12:39 PM   #27
g-heap
Scooby Newbie
 
Member#: 403883
Join Date: Oct 2014
Default

I had used M1 75w90 and got the grinding, so I looked for gear oil without the LSD additives and there weren't many readily available.

I replaced the gear oil with Walmart's supertech(?) 75w90 at the recommendation of someone here, and the grinding went away. It's labelled as a synthetic blend, suitable for "top-up" of LSD. I am guessing it doesn't have LSD additive, so it's adequate for top-off, but not for replacement.

Motul produced synthetic gear oils without LSD additives, and some people seem to be big fans, but they are bit costly.

Never tried to Subaru-branded gear oil, and they seem to have changed formulation a few times.

The grinding problem is/was true for older models 5/6-speed manual gearboxes (mine is ancient '00 model). Don't know if it's still an issue with the recent model's gearbox.
g-heap is offline   Reply With Quote
Old 04-23-2018, 01:11 PM   #28
moarboost16
Scooby Newbie
 
Member#: 447202
Join Date: May 2016
Location: Buffalo
Vehicle:
2016 wrx

Default

Ok, I have already read this but not specific to the 6speed in a 15+ wrx. I am probably just going to give it a try and see how it goes. If it starts acting funny or I don't like it then Ill just change it out for something else without the LS additive.
moarboost16 is offline   Reply With Quote
Old 09-12-2018, 11:08 PM   #29
6spdwrx
Scooby Newbie
 
Member#: 421831
Join Date: May 2015
Default Re-using crush washer

I don't see anywhere about mentioning transmission drain plug crush washer. Can we re-use it if undamaged? Is OEM one made of aluminum?
6spdwrx is offline   Reply With Quote
Old 09-18-2018, 12:16 PM   #30
d2theyip
Scooby Newbie
 
Member#: 405671
Join Date: Nov 2014
Location: Minneapolis, MN
Vehicle:
2015 WRX
Ice Metallic Silver

Default

Quote:
Originally Posted by 6spdwrx View Post
I don't see anywhere about mentioning transmission drain plug crush washer. Can we re-use it if undamaged? Is OEM one made of aluminum?
I'm pretty sure it's a rubber gasket and ~$3 from a dealer. I'm wondering if you can reuse this as well, although I need to go to the dealer anyways so I might as well pick one up.
d2theyip is offline   Reply With Quote
Old 09-18-2018, 12:29 PM   #31
standardtranny
Scooby Specialist
 
Member#: 450713
Join Date: Jul 2016
Chapter/Region: Tri-State
Location: Super bowl LII champs
Vehicle:
2017 WRX Stage 2
world rally blue

Default

Quote:
Originally Posted by 6spdwrx View Post
I don't see anywhere about mentioning transmission drain plug crush washer. Can we re-use it if undamaged? Is OEM one made of aluminum?
Mine is made of steel but I hear they come in aluminum or brass as well depending on the vehicle. I reused mine and torqued it to spec with no issues. It's just a flat washer and not a crush washer.
standardtranny is offline   Reply With Quote
Old 09-18-2018, 12:33 PM   #32
d2theyip
Scooby Newbie
 
Member#: 405671
Join Date: Nov 2014
Location: Minneapolis, MN
Vehicle:
2015 WRX
Ice Metallic Silver

Default

Quote:
Originally Posted by standardtranny View Post
Mine is made of steel but I hear they come in aluminum or brass as well depending on the vehicle. I reused mine and torqued it to spec with no issues. It's just a flat washer and not a crush washer.
@standardtranny, what torque spec did you use for the tranny and rear diff?
d2theyip is offline   Reply With Quote
Old 09-18-2018, 01:16 PM   #33
Canez17
Scooby Newbie
 
Member#: 462785
Join Date: Feb 2017
Chapter/Region: SWIC
Location: Tucson
Vehicle:
2016 WRX
WR Blue

Default I support DIY enthusiasts 💯

Service and maintenance is crucial. DIY is always a great method, following instructions and specs will determine how well the job will turn out. I always ask as many questions as I can on a DIY job.
Canez17 is offline   Reply With Quote
Old 09-18-2018, 02:13 PM   #34
standardtranny
Scooby Specialist
 
Member#: 450713
Join Date: Jul 2016
Chapter/Region: Tri-State
Location: Super bowl LII champs
Vehicle:
2017 WRX Stage 2
world rally blue

Default

Quote:
Originally Posted by d2theyip View Post
@standardtranny, what torque spec did you use for the tranny and rear diff?
https://forums.nasioc.com/forums/sho....php?t=2874775

The front torque spec can be found on the 2015 wrx epic thread of knowledge on here
standardtranny is offline   Reply With Quote
Old 10-25-2018, 03:19 PM   #35
Midnite8
Scooby Specialist
 
Member#: 430858
Join Date: Sep 2015
Chapter/Region: BAIC
Location: Mountain View, CA
Vehicle:
2016 WRX Premium
World Rally Blue

Default

How do you accurately check the fluid levels after, it's difficult because when you take it out it scrapes the sides and you may not get an accurate reading.
Midnite8 is offline   Reply With Quote
Old 10-26-2018, 10:59 AM   #36
tg900
Scooby Newbie
 
Member#: 125099
Join Date: Sep 2006
Default

Iím assuming this is for a manual transmission. Are there any brass pieces in a Subaru trans? Coming from the Toyota world, Iíve heard gear oil doesnít play nice with brass. Recommendation would be to use synchromesh fluid. I did see some complain about grinding. Maybe someone can build upon this to see if it applies to a Subaru manual trans.
tg900 is offline   Reply With Quote
Old 10-26-2018, 12:49 PM   #37
Charlie-III
NASIOC Supporter
 
Member#: 30669
Join Date: Dec 2002
Chapter/Region: Tri-State
Location: USA, North NJ, 07456
Vehicle:
1998 Legacy 2.5GT
Silver Sleeper BK, 5MT

Default

Quote:
Originally Posted by tg900 View Post
Iím assuming this is for a manual transmission. Are there any brass pieces in a Subaru trans? Coming from the Toyota world, Iíve heard gear oil doesnít play nice with brass. Recommendation would be to use synchromesh fluid. I did see some complain about grinding. Maybe someone can build upon this to see if it applies to a Subaru manual trans.
I will say, I am not a trans expert (AT or MT), in general, MT synchros are brass or similar, thus what works in one MT works in another MT UNLESS there is a clutch type LSD in the same fluid. Some clutch LSD's are not happy with some fluids.
I would go by.....FSM first, owners manual second.

A couple "cocktails" for Subaru MT's over the decades may no longer be valid due to different parts in the trans or different fluids available now.
Charlie-III is offline   Reply With Quote
Old 11-05-2018, 09:33 AM   #38
fifapro23
Scooby Newbie
 
Member#: 484112
Join Date: Apr 2018
Default

Just put in redline 75W90 gl5 and no grinding on a 2018 WRX with 8k miles.
Interesting enough, when i drained the factory fluid, it was slightly less than 3 qt (cold engine and level ground).
fifapro23 is offline   Reply With Quote
Old 11-23-2018, 02:34 PM   #39
Ferretts
Scooby Newbie
 
Member#: 416087
Join Date: Mar 2015
Chapter/Region: South East
Location: Naples FL
Vehicle:
2015 WRX
WR Blue

Default

Quote:
Originally Posted by Bikelok View Post
Sorry but I just read though this thread and I canít believe the incorrect information the OP says about the use of impact guns and torque wrenches.
I hope people know better than following the OPís advice on them.
If you can not control an electric impact gun to not destroy your aluminum trans case, you should not ever consider touching anything mechanical.

Go to a race track, see how many people there use impacts like the dewalt to do everything from brackets to drain plugs!!! Quit fear mongering and get out of your hermetically sealed bubble.
Ferretts 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 03:04 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2018 Axivo Inc.
Copyright ©1999 - 2017, North American Subaru Impreza Owners Club, Inc.