Welcome to the North American Subaru Impreza Owners Club Thursday November 27, 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 12-15-2007, 01:57 PM   #1
PERRIN_Ken
Scooby Newbie
 
Member#: 165212
Join Date: Nov 2007
Location: Hillsboro, OR
Vehicle:
2002 WRX
Blaze Yellow

Default DIY Perrin Rear Differential Cover Installation

While changing all of the fluids on PERRIN Project 15K we decided that we would take advantage of the situation and not only change the differential fluid but also add a little style and functionality to the rear end. Our rear diff cover is made from high strength, heat-treated cast aluminum. We’ve incorporated cooling fins into the design helping to reduce oil temps, in addition to looking good and cooling the oil better we’ve also increased the oil capacity more than 30% over stock. For a little more info click here.

Needed tools and gear:
1) New differential gasket (Can be purchased from any local Subaru dealer)
2) 1/2” drive wrench
3) 17mm wrench or socket
4) 14mm socket
5) Jack and jack stands

This is a very straight forward installation that can be done on either a commercial vehicle hoist or floor jack.



Step 1) Raise vehicle to desired height allowing you enough room to move freely. For this you will want to use jack stands to support the vehicle while removing and installing the differential cover. NEVER WORK ON A VEHICLE SUPPORTED ONLY BY A JACK.

Step 2) Once the vehicle is raised to the desired height you will want to use the 1/2”: drive wrench to remove the lower “drain plug”. You will also want to remove the upper “fill plug” at this time as well. Place these two plugs aside to be reinstalled later.

Step 3) Time to remove tension from the differential, this will allow you to remove the studs connecting the differential to the cross support. You’ll need to get a floor jack for this next step. Placing the jack under the differential you’ll want to raise the differential roughly .5”.

Step 4) Using a 17mm socket remove the 17mm nuts securing the differential to the cross support. Remove the studs from the differential and the cross support by using the “Jam-Nut” method. (this is where you “jam” 2 17mm nuts together on one stud. Then you can remove the stud by unscrewing the nut closest to the differential). Repeat this process on the remaining stud. If this method doesn’t work you’ll have to use a stud-extracting tool.

Step 5) Once the two studs are removed from the differential and the cross support, its time to lower the differential. If needed you may want to remove or lower the exhaust system allowing yourself more working room. Because our vehicle had a differential skip plate we had to remove the exhaust. You now should see and have access to all 8 14mm bolts securing the differential cover to the differential. Using a 14mm socket remove the bolts. (NOTE: WHILE REMOVING THE DIFF COVER THERE WILL BE ADDITIONAL OIL THAT WILL BEGIN TO COME FROM THE BOTTOM OF THE DIFFERENTIAL). Once the cover is removed you’ll want to wipe out as much excess oil from the differential as possible.

Step 6) Once everything is clean you can place THE NEW DIFFERENTIAL GASKET to the PERRIN differential cover. Using the 8 14mm bolts remove earlier loosely place the cover back into place. Starting at the top two bolts tighten the bolts to 21.7ft-lbs.

Step 7) Raise the differential back into place using the floor jack. Once the differential is in place (you’ll be able to tell because the differential nut holes will line up with the cross support holes). With everything lined up you’ll want to place and tighten the two bolts/nuts removed earlier to 52ft-lbs. Before doing this thread studs into differential cover until they are bottomed out.

Step 8) Reinstall the lower drain plug into the newly installed PERRIN differential cover. Tighten this drain plug using the ½” drive wrench to 36.2ft-lbs.

Step 9) Fill differential with proper high quality gear oil until oil starts to drip from the upper fill hole. Install the upper plug and tighten to 36.3ft-lbs.

Step 10) Lower vehicle and take it for a test drive. Check for oil leaks after the test drive.


Ken Jubb
Sales
PERRIN Performance™
AIM: altaperrinsales4
1-503-693-1702 Ex. 113
ken.jubb@perrinperformance.com
* Registered users of the site do not see these ads.

Last edited by PERRIN_Ken; 12-23-2007 at 01:29 AM.
PERRIN_Ken is offline   Reply With Quote
Old 12-16-2007, 09:43 PM   #2
Str8Gone
Scooby Specialist
 
Member#: 147972
Join Date: May 2007
Chapter/Region: MAIC
Location: severna park md
Vehicle:
2004 wrx hybrid 18g
jbp

Default

Thats looks mean, now I just need to go out and get an STI rear diff
Str8Gone is offline   Reply With Quote
Old 12-16-2007, 11:57 PM   #3
PERRIN_Ken
Scooby Newbie
 
Member#: 165212
Join Date: Nov 2007
Location: Hillsboro, OR
Vehicle:
2002 WRX
Blaze Yellow

Default

Quote:
Originally Posted by Str8Gone View Post
Thats looks mean, now I just need to go out and get an STI rear diff
We did this application on our 2002 WRX. I also recommend that when you replace the diff cover you also install our P.S.P. I only say this because you have to go through half of the same steps for both.

Have a good one

Ken

Ken Jubb
Sales
PERRIN Performance™
AIM: altaperrinsales4
1-503-693-1702 Ex. 113
ken.jubb@perrinperformance.com

Last edited by PERRIN_Ken; 12-23-2007 at 01:33 AM.
PERRIN_Ken is offline   Reply With Quote
Old 12-17-2007, 12:01 AM   #4
djerickd
Scooby Guru
 
Member#: 3782
Join Date: Jan 2001
Chapter/Region: South East
Location: Tampa B*tch!
Vehicle:
02 WRX WFC#040
Clean on 19's

Default

Quote:
Originally Posted by Str8Gone View Post
Thats looks mean, now I just need to go out and get an STI rear diff
I too thought these were only for the STi...
djerickd is offline   Reply With Quote
Old 12-17-2007, 08:19 PM   #5
BenMara
Scooby Newbie
 
Member#: 82949
Join Date: Mar 2005
Chapter/Region: South East
Location: Everywhere: SC
Vehicle:
2011 Tacoma

Default

Quote:
Originally Posted by PERRIN_Ken View Post
I also recommend that when you replace the diff cover you also install our P.S.P. I only say this because you have to go through half of the same steps for both.
what Perrin product are you referring to ?? P.S.P.???
BenMara is offline   Reply With Quote
Old 12-18-2007, 04:16 AM   #6
PERRIN_Ken
Scooby Newbie
 
Member#: 165212
Join Date: Nov 2007
Location: Hillsboro, OR
Vehicle:
2002 WRX
Blaze Yellow

Default

Quote:
Originally Posted by BenMara View Post
what Perrin product are you referring to ?? P.S.P.???

Nope we have a diff cover that works on the STI and one for the WRX. PSP I dont know what I was thinking I ment S.L.S. (Subframe Lockdown System). It is a really simple install. It helps firm up the rear end.

Sorry for the typo....

Ken

Ken Jubb
Sales

PERRIN Performance™
AIM: altaperrinsales4
1-503-693-1702 Ex. 113
ken.jubb@perrinperformance.com

Last edited by PERRIN_Ken; 01-12-2008 at 01:09 PM.
PERRIN_Ken is offline   Reply With Quote
Old 01-10-2008, 12:57 PM   #7
PERRIN
NASIOC Manufacturer
 
Member#: 6776
Join Date: May 2001
Chapter/Region: NWIC
Default Coupon Code And Details Check It Out!

Quote:
Originally Posted by djerickd View Post
I too thought these were only for the STi...
The same cover won't work on both STi and WRX. The rear end is different. BUT we do offer both styles.

WRX Style Click HERE!

STi Style Click HERE!


Also as a special deal for our NASIOC friends, order direct form PERRIN either of the styles above and receive and addl. 15% off the purchase price!

During checkout use coupon code COOLDIFF (must be caps) for 15% off. Price good for 30 days!

Thanks again everyone!

adam.taft@perrinperformance.com
PERRIN is offline   Reply With Quote
Old 01-29-2008, 01:03 PM   #8
kingmissil
Scooby Newbie
 
Member#: 41024
Join Date: Aug 2003
Location: miami, fl
Vehicle:
2004 wrx
WR Blue

Default

ordered this and the lock down kit. Look forward to the install.
kingmissil is offline   Reply With Quote
Old 01-29-2008, 01:15 PM   #9
Crazykev
Scooby Specialist
 
Member#: 93667
Join Date: Aug 2005
Chapter/Region: MWSOC
Location: Cincinnati,Oh
Vehicle:
'03 Build'n a 2.12L
331whp/331wtq

Default

Very nice cover. I swapped to an R180 and used your cover. Looks freakin' killer





Also made my own magnetic alum. plug from the factory magnet. Rivited and J B welded. It can't ever fall off and makes the diff look even more trick.

Crazykev is offline   Reply With Quote
Old 01-29-2008, 02:42 PM   #10
djerickd
Scooby Guru
 
Member#: 3782
Join Date: Jan 2001
Chapter/Region: South East
Location: Tampa B*tch!
Vehicle:
02 WRX WFC#040
Clean on 19's

Default

nice plugs!
djerickd is offline   Reply With Quote
Old 01-29-2008, 04:07 PM   #11
kingmissil
Scooby Newbie
 
Member#: 41024
Join Date: Aug 2003
Location: miami, fl
Vehicle:
2004 wrx
WR Blue

Default

that came out nice, excellent work.
kingmissil is offline   Reply With Quote
Old 01-29-2008, 06:43 PM   #12
PERRIN_Ken
Scooby Newbie
 
Member#: 165212
Join Date: Nov 2007
Location: Hillsboro, OR
Vehicle:
2002 WRX
Blaze Yellow

Default

Looking good and I love the plugs

Ken

Ken Jubb
Sales
PERRIN Performance™
AIM: altaperrinsales4
1-503-693-1702 Ex. 113
ken.jubb@perrinperformance.com
PERRIN_Ken is offline   Reply With Quote
Old 01-29-2008, 10:08 PM   #13
scby rex
Scooby Guru
 
Member#: 104878
Join Date: Jan 2006
Chapter/Region: TXIC
Location: copperas cove
Vehicle:
02 wrxbastardchild
aw, MPS 2.34 breaking in

Default

this isnt really related but could be. How do you tell the difference between the 06 sti r180 and the others from the outside? Mine just came in and I want ti be sure.
scby rex is offline   Reply With Quote
Old 01-29-2008, 10:11 PM   #14
Crazykev
Scooby Specialist
 
Member#: 93667
Join Date: Aug 2005
Chapter/Region: MWSOC
Location: Cincinnati,Oh
Vehicle:
'03 Build'n a 2.12L
331whp/331wtq

Default

You have to take off the cover and get the tooth count numbers off the ring gear and they should be a 3.54 ratio. Divide the larger number by the lower. I don't remember what the numbers are off hand.
Crazykev is offline   Reply With Quote
Old 01-29-2008, 10:17 PM   #15
scby rex
Scooby Guru
 
Member#: 104878
Join Date: Jan 2006
Chapter/Region: TXIC
Location: copperas cove
Vehicle:
02 wrxbastardchild
aw, MPS 2.34 breaking in

Default

I dont know what you mean but divide the larger# by the smaller#, It should be 3.54, I just dont want to take it apart as if its wrong Ill be shipping it back. Are there any #s on the outside? Sorry jeff for mudding up your thread.
scby rex is offline   Reply With Quote
Old 01-29-2008, 10:59 PM   #16
PERRIN
NASIOC Manufacturer
 
Member#: 6776
Join Date: May 2001
Chapter/Region: NWIC
Default

acby rex: No muddy issues here! We like a nice interchange of information.

They covers are different sizes as well. The holes are different etc. Maybe we can get Ken to take a side by side, so you folks can see better.

Thanks again!

Adam.Taft@perrinperformance.com
PERRIN is offline   Reply With Quote
Old 01-29-2008, 11:04 PM   #17
scby rex
Scooby Guru
 
Member#: 104878
Join Date: Jan 2006
Chapter/Region: TXIC
Location: copperas cove
Vehicle:
02 wrxbastardchild
aw, MPS 2.34 breaking in

Default

ok I just put this in my thread, but I have a 06 sti rear diff and is has this on the bottom
ND1058
o2
56D
layed out like this on the bottom, Adam do you know if this is a 06 for sure and not a 05 or 07? Thanks.

Last edited by scby rex; 01-29-2008 at 11:07 PM. Reason: wrong person
scby rex is offline   Reply With Quote
Old 01-29-2008, 11:17 PM   #18
Crazykev
Scooby Specialist
 
Member#: 93667
Join Date: Aug 2005
Chapter/Region: MWSOC
Location: Cincinnati,Oh
Vehicle:
'03 Build'n a 2.12L
331whp/331wtq

Default

R160 and R180

Crazykev is offline   Reply With Quote
Old 01-29-2008, 11:24 PM   #19
scby rex
Scooby Guru
 
Member#: 104878
Join Date: Jan 2006
Chapter/Region: TXIC
Location: copperas cove
Vehicle:
02 wrxbastardchild
aw, MPS 2.34 breaking in

Default

do all r180s have the 21 stamp on them like the r160 have the star?
scby rex is offline   Reply With Quote
Old 01-30-2008, 12:01 AM   #20
Token-Negro
Scooby Specialist
 
Member#: 81659
Join Date: Feb 2005
Chapter/Region: NWIC
Location: Sammamish
Vehicle:
2006 STI / 2010 FXT
Aspen White / Silver

Default





Last edited by Token-Negro; 01-31-2008 at 01:44 PM.
Token-Negro is offline   Reply With Quote
Old 01-30-2008, 12:03 AM   #21
scby rex
Scooby Guru
 
Member#: 104878
Join Date: Jan 2006
Chapter/Region: TXIC
Location: copperas cove
Vehicle:
02 wrxbastardchild
aw, MPS 2.34 breaking in

Default

nice^
scby rex is offline   Reply With Quote
Old 01-30-2008, 12:16 AM   #22
Paranoid Fabrications
NASIOC Vendor
 
Member#: 140712
Join Date: Feb 2007
Chapter/Region: SCIC
Location: San Diego, CA
Vehicle:
2008 WRX STI
White

Default

yea, that green one is nice looking
Paranoid Fabrications is offline   Reply With Quote
Old 01-30-2008, 12:17 AM   #23
modaddict
Scooby Guru
 
Member#: 95840
Join Date: Sep 2005
Chapter/Region: NWIC
Location: Pasco, WA
Vehicle:
sold to a good bud
awaiting next car

Default

yellow FTW!
modaddict is offline   Reply With Quote
Old 01-30-2008, 01:55 AM   #24
Paranoid Fabrications
NASIOC Vendor
 
Member#: 140712
Join Date: Feb 2007
Chapter/Region: SCIC
Location: San Diego, CA
Vehicle:
2008 WRX STI
White

Default

Quote:
Originally Posted by modaddict View Post
yellow FTW!
no no no. Green FTW
Paranoid Fabrications is offline   Reply With Quote
Old 01-30-2008, 08:35 AM   #25
Crazykev
Scooby Specialist
 
Member#: 93667
Join Date: Aug 2005
Chapter/Region: MWSOC
Location: Cincinnati,Oh
Vehicle:
'03 Build'n a 2.12L
331whp/331wtq

Default

Thread size is 3/4" NPT and not 1/2" NPT sorry if I screwed anyone up

The plugs that I used were 3/4"" NPT incase anyone is interested.

Nice work on the painted ones guys. I was also going to use SS allen bolts on my cover, but decided to skip it. Looks good. I did do the SS bolts on my bearing caps . Almost all bolts under my hood are SS allen bolts. 90% are including all the bolts for the intake mani including the long 8mm ones that bolt it down to the head. All the ones that can be seen are SS allen.

Last edited by Crazykev; 02-01-2008 at 08:20 AM.
Crazykev 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
DIY Perrin Rear Differential / Subframe Lockdown System PERRIN_Ken NASIOC Project Cars 158 09-15-2014 06:21 PM
perrin rear differential cover arrowscooby Drivetrain 2 04-05-2009 03:04 AM
Perrin Rear Differential Cover JSC Speed Drivetrain 2 12-22-2008 06:45 PM
Will ProDrive rear diff cover fit Perrin rear diff cover subbiedo04 Transmission (AT/MT) & Driveline 5 04-01-2007 10:30 AM


All times are GMT -4. The time now is 02:45 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.