The Subaru SVX World Network   SVX Network Forums
Live Chat!
SVX or Subaru Links
Old Lockers
Photo Post
How-To Documents
Message Archive
SVX Shop Search
IRC users:

Go Back   The Subaru SVX World Network > SVX Main Forums > Technical Q & A

Thread Tools Display Modes
Old 07-30-2018, 03:00 AM
jetboy's Avatar
jetboy jetboy is offline
Very Terrific Driver
Join Date: Oct 2011
Location: Norway, way of Jupiter
Posts: 626
Registered SVX
I need new diff(s) and need expert advice

First of all, a transmission swap is not my preferred route at this point. I plan for 6 DCCD in the future.

My rear diff has play in the yoke/pinion part (where the propshaft connects). This is causing noise, vibration and general mental discomfort. It needs to be replaced.

My current driveline is a EUDM VTD with 3.7 final drive. Finding such diffs is fairly difficult and I'm considering going 3.9 to retain lower RPM while increasing my options. I would like to keep LSD. So here's my questions:

1) How interchangable are the Subaru front diffs, considering my stock 4EAT?
a) Can I use any front diff from any transmission?

2) Exactly what modifications need to be done to an R180 to make it fit?
a) Are there any consequences I need to consider?
b) Do I need to modify the diff itself (i.e Yoke/Pinion) or is it true bolt in? Keep in mind that the input part is the problem on my current diff

3) Are there any 3.7 LSDs available? Some sources claim some USDM WRX came with 3.7.
a) Is there any experience with this?
b) Is this a R160/R180/LSD etc?

4) Are there any cheapo 3.7 non-LSDs that are a direct bolt in?

By and large, I would need the "definitive" advise on what to do. I would also be very happy to receive instructions on front diff swap unless it's fully covered in the service manual.

I got my girl,
I got my glass,
I got my car and
I'm ready to f...
Reply With Quote

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 -6. The time now is 01:11 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
2001-2015 SVX World Network