05 LGT 4.11 rear diff fit in wrx?

morrocco88 · 05-20-2008, 01:35 PM

I have an 03' wrx drivetrain swapped into my 97' legacy, but wanted to see if an 05' LGT rear diff will bolt up the same as a wrx? So has anybody put an LGT diff into their wrx to change final drive?

I did search, but couldn't find the answer.

Thanks!

* Registered users of the site do not see these ads.

minifreak · 05-20-2008, 06:34 PM

If you are changing the rear final drive you will need to change your front final drive as well.

03 WRX has a 3.9 front and needs a 3.54 rear ring and pinion to work.

morrocco88 · 05-21-2008, 12:33 AM

Yeah, I'm planning on changing the front diff in the way of an 05' LGT tranny, which came with a rear diff, but just wanted to make sure it will work, or will I have to get a 2.5rs 4.11 or something.

jaxscuby · 05-21-2008, 10:45 AM

legacy center diff is 1:1, not like wrx 1:1.1.

so if your legacy has 4.11 in front, get 4.11 for the rear.

darksc00by · 05-21-2008, 10:47 AM

Quote:

Originally Posted by jaxscuby

legacy center diff is 1:1, not like wrx 1:1.1.

so if your legacy has 4.11 in front, get 4.11 for the rear.

this man speaks the truth!

not going to work unless you get some custom mad tyte front diff made.

morrocco88 · 05-21-2008, 03:01 PM

Custom mad tyte diff?

I have a complete LGT tranny out of 05', and it does have a 1 to 1 center, so I know I need a 4.11 rear end to match, which I have from the same 05' legacy, but just need to know if it bolts up the same as other R160's, or specifically the 03' wrx, because I have that in my car right now. I'm thinking it does, but just wanted to make sure.

ciper · 05-21-2008, 03:33 PM

Just curious why you would think it doesn't fit? I have a 6 r160 in front of me with different ratios and from different years and are essentially identical.

As far as EJ based Subaru's go there are only two differences that could get you -
Male VS female axle stubs (wont be a problem for the two cars you mentioned)
Mounting studs of different lengths (if they are different its REALLY easy to swap them)

darksc00by · 05-21-2008, 04:39 PM

Quote:

Originally Posted by ciper

Just curious why you would think it doesn't fit? I have a 6 r160 in front of me with different ratios and from different years and are essentially identical.

As far as EJ based Subaru's go there are only two differences that could get you -
Male VS female axle stubs (wont be a problem for the two cars you mentioned)
Mounting studs of different lengths (if they are different its REALLY easy to swap them)

We were saying WRX transmission plus LGT rear diff won't work.

Yes WRX motor will work with any EJ series transmission and rear diff.

ciper · 05-21-2008, 08:59 PM

Quote:

Originally Posted by darksc00by

We were saying WRX transmission plus LGT rear diff won't work.

What if he took the LGT rear diff and swapped the WRX ring and pinion into it!

I think the OP needs to be more clear in his first post.

05-20-2008, 01:35 PM	#1
morrocco88 Scooby Specialist Member#: 104098 Join Date: Jan 2006 Chapter/Region: NWIC Location: Eastern WA Vehicle: 1997 LGT 2.1 stroker Rotated S200SX-56 6speed	05 LGT 4.11 rear diff fit in wrx? I have an 03' wrx drivetrain swapped into my 97' legacy, but wanted to see if an 05' LGT rear diff will bolt up the same as a wrx? So has anybody put an LGT diff into their wrx to change final drive? I did search, but couldn't find the answer. Thanks! * Registered users of the site do not see these ads.

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
FS in MA: 05 LGT transmission (=JDM STI) + 4.11 rear diff	unclemat	Drivetrain	22	12-11-2008 04:53 PM
FS in MA: 05 LGT transmission (JDM STI) + 4.11 rear diff	unclemat	NESIC Private Classifieds	6	12-10-2008 10:48 AM
STI Rear diff fit in a 05 WRX?	ng_wrx_05	Transmission (AT/MT) & Driveline	9	01-10-2007 03:24 PM
IN. WTB: 4.11 rear diff for 98 rs needed	cavakilla	Private 'Wanted' Classifieds	1	10-05-2005 09:23 AM
JDM EJ20G w/ 4.11 rear diff in my '03 wrx?	drunkguy	Transmission (AT/MT) & Driveline	2	05-04-2004 09:36 PM

05-20-2008, 06:34 PM	#2
minifreak Scooby Specialist Member#: 116914 Join Date: Jun 2006 Chapter/Region: VIC Location: Beautiful British Columbia Vehicle: 2006 WRX Wagon Obsidian Black	If you are changing the rear final drive you will need to change your front final drive as well. 03 WRX has a 3.9 front and needs a 3.54 rear ring and pinion to work.

05-21-2008, 12:33 AM	#3
morrocco88 Scooby Specialist Member#: 104098 Join Date: Jan 2006 Chapter/Region: NWIC Location: Eastern WA Vehicle: 1997 LGT 2.1 stroker Rotated S200SX-56 6speed	Yeah, I'm planning on changing the front diff in the way of an 05' LGT tranny, which came with a rear diff, but just wanted to make sure it will work, or will I have to get a 2.5rs 4.11 or something.

05-21-2008, 10:45 AM	#4
jaxscuby n00b Moderator Moderator Member#: 10613 Join Date: Sep 2001 Chapter/Region: South East Location: F L O R I D A Vehicle: 2002 USDM WRX WRB	legacy center diff is 1:1, not like wrx 1:1.1. so if your legacy has 4.11 in front, get 4.11 for the rear.

05-21-2008, 03:01 PM	#6
morrocco88 Scooby Specialist Member#: 104098 Join Date: Jan 2006 Chapter/Region: NWIC Location: Eastern WA Vehicle: 1997 LGT 2.1 stroker Rotated S200SX-56 6speed	Custom mad tyte diff? I have a complete LGT tranny out of 05', and it does have a 1 to 1 center, so I know I need a 4.11 rear end to match, which I have from the same 05' legacy, but just need to know if it bolts up the same as other R160's, or specifically the 03' wrx, because I have that in my car right now. I'm thinking it does, but just wanted to make sure.

05-21-2008, 03:33 PM	#7
ciper Scooby Guru Member#: 15543 Join Date: Feb 2002 Location: san francisco, ca Vehicle: 90BJ Legacy LS ABS AWD 946 Rio Red Jpn built	Just curious why you would think it doesn't fit? I have a 6 r160 in front of me with different ratios and from different years and are essentially identical. As far as EJ based Subaru's go there are only two differences that could get you - Male VS female axle stubs (wont be a problem for the two cars you mentioned) Mounting studs of different lengths (if they are different its REALLY easy to swap them)