Welcome to the North American Subaru Impreza Owners Club Tuesday March 2, 2021
Home Forums Images 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.







* As an Amazon Associate I earn from qualifying purchases. 
* Registered users of the site do not see these ads. 
Reply
 
Thread Tools Display Modes
Old 01-03-2017, 12:09 AM   #51
gnashville
Scooby Newbie
 
Member#: 460638
Join Date: Jan 2017
Vehicle:
2004 Forester X
Blue

Default

Quote:
Originally Posted by dead_eye View Post
Excellent!
I say!
* Registered users of the site do not see these ads.
gnashville is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 01-25-2017, 10:41 PM   #52
LeeRSti
Scooby Newbie
 
Member#: 266394
Join Date: Dec 2010
Location: Colorado
Vehicle:
2001 2.5 RS
Black Diamond Pearl

Default

I just want to verifiy, the R160 came in all Imprezas and WRXs, and the R180 came in all STis? JDM and USDM?
LeeRSti is offline   Reply With Quote
Old 01-31-2017, 04:04 PM   #53
R31oH
Scooby Newbie
 
Member#: 265702
Join Date: Dec 2010
Chapter/Region: South East
Vehicle:
96 lgacy
white

Default

Awesome post and awesome 818 in the background of the 1st pic! Kind of a noob question here... but how did you get the rear diff out of its casing?
I am currently doing a diff swap on my 96 legacy gt, I believe its an R160. The diff is off the car, I have the rear cover and side bearing retainers off, but I cant seem to wiggle the diff out! I thought I had to pull off the side bearings off the actual diff to slide it out of the housing, but you have bearings on all your rear diffs! This is my first time doing diff work and it is driving me nuts!!! Do i just yank it out of there or am I missing something?

Last edited by R31oH; 01-31-2017 at 04:16 PM.
R31oH is offline   Reply With Quote
Old 04-15-2017, 11:23 AM   #54
johnnyw2007
Scooby Newbie
 
Member#: 463614
Join Date: Feb 2017
Location: ohio
Vehicle:
2007 wrx
black

Default

Not sure if this is the right spot but pretty sure it is. But my front diff seems to be slowly leaking and I checked the levels and it's barely covering the L on the dipstick and I was wondering if this little leak is a common problem and just needs a little bolt snugging or what and also what kind of gear oil should I use? 2007 wrx 5 speed btw. Thank you!
johnnyw2007 is offline   Reply With Quote
Old 04-24-2017, 05:08 PM   #55
WhiteRguyX
Scooby Newbie
 
Member#: 126782
Join Date: Sep 2006
Default

Question for the diff experts:

Has anyone seen or heard any info on a front 1-way LSD for a 6MT 2016 WRX? Stage 2 with flex fuel ate mine on the track a week ago and I can't find any info on it.

Any help is much appreciated!!
WhiteRguyX is offline   Reply With Quote
Old 06-27-2017, 06:00 PM   #56
Awd1stgen
Scooby Newbie
 
Member#: 440351
Join Date: Feb 2016
Default

Does a 4eat front ring gear mount in a 5mt given same ratio?
Awd1stgen is offline   Reply With Quote
Old 03-20-2018, 08:51 AM   #57
JDM_mes
Scooby Newbie
 
Member#: 201914
Join Date: Feb 2009
Chapter/Region: International
Location: Japan
Vehicle:
1997 Impreza
White

Default

cant see any of the photos. would be great posts... but not
JDM_mes is offline   Reply With Quote
Old 06-06-2018, 01:50 PM   #58
Fierysun
Scooby Guru
 
Member#: 82745
Join Date: Mar 2005
Chapter/Region: SCIC
Location: So Cal
Vehicle:
2005 Subaru STI
2003 EJ207 S204 Wagon

Default

How does the car handle/behave between the AP suretrac, Torsen, and clutch style diff? Basically, if i have a Torsen, is there a good reason for me to switch to suretrac or clutch type?
Fierysun is offline   Reply With Quote
Old 06-21-2018, 03:32 PM   #59
rain164845y
Scooby Newbie
 
Member#: 419917
Join Date: Apr 2015
Default

So is this a simple bolt in for 2015+ WRX? I have never seen the various splines to know if it is compatible or not. Also, is this a legit suretrac, or vlsd? How do I know?
Thanks!

https://rover.ebay.com/rover/0/0/0?m...2F273292043770
rain164845y is offline   Reply With Quote
Old 06-30-2018, 06:45 PM   #60
mihael
Scooby Newbie
 
Member#: 296973
Join Date: Oct 2011
Location: Romania
Vehicle:
2007 Forester XT
Blue

Default

What are the TBD (torque biasing) options for 5MT? Can you please also tell which one uses male and which one uses female axles? Thanks everyone!
mihael is offline   Reply With Quote
Old 07-05-2018, 01:00 PM   #61
mihael
Scooby Newbie
 
Member#: 296973
Join Date: Oct 2011
Location: Romania
Vehicle:
2007 Forester XT
Blue

Default

And another question: Can a 6MT diff fit into a 5MT?
mihael is offline   Reply With Quote
Old 07-15-2018, 12:26 AM   #62
matz73z
Scooby Newbie
 
Member#: 70032
Join Date: Sep 2004
Location: North Bend, Wa
Vehicle:
2004 WRX
White/cf hood

Default

Can someone confirm if there is a difference between the axle/splines of an 03 JDM R180 and an 05 USDM R180?
matz73z is offline   Reply With Quote
Old 09-06-2018, 03:47 PM   #63
Crazyced
Scooby Newbie
 
Member#: 378119
Join Date: Jan 2014
Chapter/Region: E. Canada
Location: Ottawa
Vehicle:
2004 Impreza WRX
World Rally Blue

Default

I would like to add that since buying a 6MT with a suretrac front, I have done research on how it worked exactly other then 'some magic happens'.

Here's the document that put it all together for me:
http://www.lezo.hu/szerkezettan/hajt...fferencial.pdf

For anyone else that would like to understand how their suretrac LSD works.
Crazyced is offline   Reply With Quote
Old 09-07-2018, 03:24 PM   #64
mrsaturn7085
Scooby Specialist
 
Member#: 375462
Join Date: Dec 2013
Chapter/Region: NWIC
Location: Portland, OR
Vehicle:
2006 Impreza WRX STI
WR Blue

Default

Great find - thanks for posting!
mrsaturn7085 is offline   Reply With Quote
Old 10-29-2018, 02:31 PM   #65
BLOB-I STI
Scooby Newbie
 
Member#: 493342
Join Date: Oct 2018
Default Very helpful

Very helpful thank you!
BLOB-I STI is offline   Reply With Quote
Old 03-24-2019, 06:44 PM   #66
pontoontodd
Scooby Newbie
 
Member#: 484507
Join Date: Apr 2018
Default

This is a fantastic thread, thank you for posting all the pictures and info!
What years/models were the version 1 and 2 VLSD found in?
I have broken two sets of spiders gears in R160 open diffs now and like the idea of the four idlers in the V1 VLSD. I have never seen rear axles with the double spline though, was that ever sold in the US?
pontoontodd is offline   Reply With Quote
Old 05-22-2019, 06:45 PM   #67
juliolucero12
Scooby Newbie
 
Member#: 469779
Join Date: Jun 2017
Default

Here is my problem i hope someone can answer it.

Will mismatching a transmission (from a stock 2005 wrx) and a rear differential (from a stock 2002 impreza) work? or, would it be a catastrophic disaster?

Reason i am asking, is because i had this set up, car drove fine, but then the transmission died 3 days after the full swap with exception of the rear differential because i though, and im puzzled.

Symptoms,

while driving i heard a noise and it sounded like a bad wheel bearing, then the car would shake then stop shaking and then back to normal, noise stayed.

2 nights ago the car stalled on me on the freeway on my way home. i first thought it was the clutch because i had just put a new one on it. took the car home, removed the engine and everything looked good.

The shaft from transmission turns but it will not go into any gear.

Did i shoot myself on the foot by not swapping the rear diff?

looking forward to your reply.

Thanks,
Julio
juliolucero12 is offline   Reply With Quote
Old 05-25-2019, 12:38 PM   #68
Kids_Subie
Scooby Newbie
 
Member#: 500329
Join Date: Apr 2019
Default

Hello Julio,
I am new to Subarus and I am sure some of the smarter guys on here will correct me if I am wrong but if the new transmission is JDM then the gears are different and you would have had to also change the rear diff. If not it might make your center diff work to hard and it might lock up. When that happens it will cause stress on the transmission. My son 05 WRX had the center diff lock up and then it caused a bearing in the transmission lock lock up. Right now I have the transmission apart and I am trying to figure out what gears to use to make sure I don't have that problem.
Kids_Subie is offline   Reply With Quote
Old 05-26-2019, 11:05 AM   #69
mihael
Scooby Newbie
 
Member#: 296973
Join Date: Oct 2011
Location: Romania
Vehicle:
2007 Forester XT
Blue

Default

Dear Julio,

My experience is with manual transmissions:

The front differential has a final drive ratio, eg. 3.7, 3.9, 4.11, 4.44. The transfer case (which is the rear part of the transmission and contains the center differential) has a trasfer ratio which could be 1 or 1.1. The rear differential also has a final drive ratio. The front final drive ratio has to be equal with the rear final drive ratio multiplied by the transfer ratio.

Example: 4.11 = 4.11 x 1. Another example: 3.9 = 3.54 x 1.1

Subaru has viscous center differentials which tries to match the rotational speed of the front axle with the one of the rear axle. They do that by means of friction which generates heat. In case your transmission had a mismatch between the front final drive and the rear final drive multiplied with the transfer ratio, your center diff worked hard to oppose that difference in rotational speed and heated up very much - maybe to the point of seasing.

I am sorry for your trouble.

You can check the final drive ratios and transfer ratio in a document like: https://www.rallispec.com/downloads/...art_Public.pdf
mihael is offline   Reply With Quote
Old 06-21-2019, 08:35 PM   #70
spaceframe
Scooby Newbie
 
Member#: 503462
Join Date: Jun 2019
Question Differential Spline Profile

Thanks for the info on diffs. I am building a Lotus 7 style roadster with Suby rear diff, axles, hubs and brakes. I purchased a diff online that I was told was from a 2005 JDM Legacy Outback Turbo. It was said to be a 3.27 LSD, perfect for what I need. It appears to be a LSD, the ratio I have not confirmed. I had already bought 2009 Outback CV's as they were the correct length (30.5") for my build. The spline count on both the diff and the axles is the same at 25, however, the spline profile is different. The axles have V shaped groves with flattened peaks, whereas the diff has V shaped groves and sharp peaks. The diameter appears the same, but the spline profile is different and the axles will not fit the diff splines. I can return the axles, but I need to know what to get that will fit. Has anyone got an idea? Alternately, I can swap spider gears, but a comparable axle is easier. Any help, knowledge, or even a friggin good guess would be appreciated.
spaceframe is offline   Reply With Quote
Old 06-27-2019, 05:23 PM   #71
papak
Scooby Newbie
 
Member#: 503246
Join Date: Jun 2019
Default

Can I swap the ring gear from a viscous LSD to a mechanical one?
papak is offline   Reply With Quote
Old 06-27-2019, 05:25 PM   #72
papak
Scooby Newbie
 
Member#: 503246
Join Date: Jun 2019
Default

What model and year would have a Torson style LSD in an R160?
papak is offline   Reply With Quote
Old 11-04-2019, 01:35 PM   #73
kashmir
Scooby Newbie
 
Member#: 457074
Join Date: Oct 2016
Default

Nice to see that photobucket basically ruined the forum! Bravo!
kashmir is offline   Reply With Quote
Old 01-12-2020, 06:24 PM   #74
Cifcik_
Scooby Newbie
 
Member#: 510646
Join Date: Jan 2020
Location: Los Angeles, California
Default

Quote:
Originally Posted by JarHarms View Post
Awesome post. This is a good great resource. I get pretty irritated when I see people selling R160 VLSDs and CLSDs as Suretracs.
Do you know if there is there is a Subaru factory R160 clutch LSD that uses the symmetrical axles instead of the bolt in stubs? I thought there might be some of those available but never able to confirm true or false.

* - hmm maybe these exist after all?



You read my mind!!!! Everything you just said I was about to reply! Wth LoL Iím tripping out. This is good stuff man
Cifcik_ is offline   Reply With Quote
Old 02-17-2020, 07:05 PM   #75
World Rallysaurus X
Scooby Newbie
 
Member#: 500572
Join Date: Apr 2019
Location: NYC
Vehicle:
2019 WRX Premium
Ice Silver G1U

Default

Hello Everyone!
I purchased a 2019 WRX last year and am looking to swap the rear open diff to an LSD. Im hoping to purchase one new from the dealer. Would you guys be able to help me find the correct part number for one that will fit?
Thanks!
World Rallysaurus X 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 06:41 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2021 Axivo Inc.
Copyright ©1999 - 2019, North American Subaru Impreza Owners Club, Inc.

As an Amazon Associate I earn from qualifying purchases.