Welcome to the North American Subaru Impreza Owners Club Sunday August 28, 2016
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Go Back   NASIOC > NASIOC Technical > Normally Aspirated Powertrain

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 11-18-2000, 03:09 PM   #1
Geoff
Warden of NASIOC Timeout
Super Moderator
 
Member#: 592
Join Date: Dec 1999
Chapter/Region: TXIC
Location: P-Ville, Texas
Vehicle:
'11 X5 xDrive35i
'09 135i 6MT/'15 GTI 6MT

Exclamation Immediate help needed: '00 RS Tranny and LSD with axles on '99 OBS?

Anyone know if a '00 RS2.5's tranny with rear differential and axles would bolt up to my '99 OBS? Any help is appreciated; this is urgent.
Thanks,
Geoff
* Registered users of the site do not see these ads.
Geoff is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 11-18-2000, 03:21 PM   #2
MPREZYA
SCIC
Moderator
 
Member#: 85
Join Date: Jul 1999
Chapter/Region: SCIC
Location: www.themonkeystrunk.com
Post

I don't recall any reason why not.
Hell it's more of an upgrade for you. Just find out how many bolts are on the tranny and your bell housing as IIRC they changed from 8 to 4 but I believe that was in 99.
Rich
MPREZYA is offline   Reply With Quote
Old 11-18-2000, 06:37 PM   #3
rao
Scooby Specialist
 
Member#: 52
Join Date: Jun 1999
Location: Naperville, IL
Vehicle:
2005 Legacy GT
98 BMW 540i LS2/T56

Post

Rear diff and axles - no problem, you do need the axles becasaeu they are different with LSD.

The tranny on the Phase II engines was changed to the 8 bolt pattern. It is possible to make those tranny's fit the older motors with some fairly minor work.

I guess you are not selling anymore
rao is offline   Reply With Quote
Old 11-19-2000, 03:42 PM   #4
Geoff
Warden of NASIOC Timeout
Super Moderator
 
Member#: 592
Join Date: Dec 1999
Chapter/Region: TXIC
Location: P-Ville, Texas
Vehicle:
'11 X5 xDrive35i
'09 135i 6MT/'15 GTI 6MT

Post

Robert,
No, I've decided that it doesn't make financial sense to. Shouldn't the bolt pattern from a '99 OBS and RS match up? What "modification" would need to be done?

Thanks,
Geoff
Geoff is offline   Reply With Quote
Old 11-19-2000, 06:50 PM   #5
MPREZYA
SCIC
Moderator
 
Member#: 85
Join Date: Jul 1999
Chapter/Region: SCIC
Location: www.themonkeystrunk.com
Post

Drill out the bolts that don't match holes .
Rich
MPREZYA is offline   Reply With Quote
Old 11-19-2000, 10:00 PM   #6
Geoff
Warden of NASIOC Timeout
Super Moderator
 
Member#: 592
Join Date: Dec 1999
Chapter/Region: TXIC
Location: P-Ville, Texas
Vehicle:
'11 X5 xDrive35i
'09 135i 6MT/'15 GTI 6MT

Post

Mprezya: To answer your question on the chat, yes...I am.
Geoff is offline   Reply With Quote
Old 11-20-2000, 06:59 AM   #7
rao
Scooby Specialist
 
Member#: 52
Join Date: Jun 1999
Location: Naperville, IL
Vehicle:
2005 Legacy GT
98 BMW 540i LS2/T56

Post

Geoff, The bolt pattern changed on the 2000 trannys - they went from 4 bolts to 8 bolts. It is fairly easy to put a 2000 tranny on a 99, IIRC 3 of the 4 new holes match up with dowel locations. You also need to play around with the starter motor - on the 2000 the starter bolts also serve as tranny bolts. If you do a search Joel Gat did this with his Impreza L.

rao is offline   Reply With Quote
Old 11-20-2000, 08:41 AM   #8
Geoff
Warden of NASIOC Timeout
Super Moderator
 
Member#: 592
Join Date: Dec 1999
Chapter/Region: TXIC
Location: P-Ville, Texas
Vehicle:
'11 X5 xDrive35i
'09 135i 6MT/'15 GTI 6MT

Post

Robert,
What specifically do you mean by the starter motor and tranny use the same bolts? They're held to the engine using the same bolt going through both of them? Assuming West Houston knows how to work around something that isn't book-perfect, I don't think they should have a problem if this is all that's involved. Any probs with bolting up the tranny using only 3 bolts? :P
-Geoff
Geoff is offline   Reply With Quote
Old 11-20-2000, 09:00 AM   #9
efoo
Scooby Specialist
 
Member#: 80
Join Date: Jul 1999
Post

Robert, don't you mean 1999? I'm fairly sure my MY1999 transmission had 8 bolts connecting it to the engine block. I think the Subaru marketing material for MY99 also points out the change from 4-8 bolts.

Anyways, what I'm saying is that perhaps Geoff's MY99 engine may already have 8 holes and so it should match up nicely. But I don't know if the 4-8 bolt change happened for the 2.2L engines as well.

-Edwin
efoo is offline   Reply With Quote
Old 11-20-2000, 09:00 AM   #10
rao
Scooby Specialist
 
Member#: 52
Join Date: Jun 1999
Location: Naperville, IL
Vehicle:
2005 Legacy GT
98 BMW 540i LS2/T56

Post

On the 2000's the bolts that hold the starter on also go thorugh the tranny housing and act as tranny bolts (I never pulled a 99 tranny so I don't know if that changed as well). From what I remember, the new bolt holes ligh up with existing dowel locations (there are only 2 on the 2000 at the bottom) and it is pretty easy to make the 2000 fit a 99. I haven't done this, but I remember the discussion. Here is one discussion of a similar topic in reverse - http://www.i-club.com/ubb-files/Foru...ML/004531.html

Using only 3 bolts to hold the tranny on might not be the best way to go
rao is offline   Reply With Quote
Old 11-20-2000, 09:03 AM   #11
rao
Scooby Specialist
 
Member#: 52
Join Date: Jun 1999
Location: Naperville, IL
Vehicle:
2005 Legacy GT
98 BMW 540i LS2/T56

Post

You know Edwin you may be right - I think the change may have been made with the "Phase II" motors in 99, but I don't know about the 2.2. I poseted a bunch of details about the changes in 99, but I can't find them using the search function.
rao is offline   Reply With Quote
Old 11-20-2000, 09:10 AM   #12
8Complex

Moderator
 
Member#: 922
Join Date: Feb 2000
Chapter/Region: MWSOC
Location: Schaumburg, IL
Vehicle:
16 WRX (white)
04 FXT (red)

Post

RAO - Speaking on the mechanical side and countering your 3-bolt comment. I don't think it's such a big deal if the trans is held on with only 3 bolts on such low-power cars as ours. The main output shaft of the engine would go directly into the trans - taking up most/all of the stress of holding up the tranny, the bolts holding it on serve only two purposes - stopping the trans it from rotating (which you don't have to worry about much since you have the front axels coming out either side of it as well), and keeping the trans/housing against the block of the motor.

Anyway, just my 2 cents. For some reason I feel like a smartass today.
8Complex is offline   Reply With Quote
Old 11-20-2000, 09:17 AM   #13
rao
Scooby Specialist
 
Member#: 52
Join Date: Jun 1999
Location: Naperville, IL
Vehicle:
2005 Legacy GT
98 BMW 540i LS2/T56

Post

No problem Nick, bring you car over this weekend and I'll take out 5 of the tranny bolts! We'll see how it works.
rao is offline   Reply With Quote
Old 11-20-2000, 09:20 AM   #14
8Complex

Moderator
 
Member#: 922
Join Date: Feb 2000
Chapter/Region: MWSOC
Location: Schaumburg, IL
Vehicle:
16 WRX (white)
04 FXT (red)

Post

LOL, you know, I just might do it if it was summertime. I'm pretty sure that theory holds solid.
8Complex is offline   Reply With Quote
Old 11-20-2000, 10:11 AM   #15
Geoff
Warden of NASIOC Timeout
Super Moderator
 
Member#: 592
Join Date: Dec 1999
Chapter/Region: TXIC
Location: P-Ville, Texas
Vehicle:
'11 X5 xDrive35i
'09 135i 6MT/'15 GTI 6MT

Post

All,
I called Performance Subaru in New Orleans; They told me that the transmission housing change came in 7/98 and all cars made after (ie MY99+ 2.2/2.5) have the exact same part number for the transmission housing. This being the case, the '00 RS tranny should bolt right up!

Robert:
I'm guessing Joel Gat's Impreza-L was a pre-99.

Edwin:
I need to trade in my old tranny (core deposit) in order to get the new transmission, but I'll see if I can get the guy to let it go for $100 to you.


Thanks!
Geoff
Geoff is offline   Reply With Quote
Old 11-20-2000, 11:22 AM   #16
rao
Scooby Specialist
 
Member#: 52
Join Date: Jun 1999
Location: Naperville, IL
Vehicle:
2005 Legacy GT
98 BMW 540i LS2/T56

Post

Geoff - IIRC, Joel's is a 97. Good deal, should be an easy job then, my memory must be slipping

Nick - any time you like - I'm ready.
rao is offline   Reply With Quote
Old 11-20-2000, 03:17 PM   #17
Joel Gat, 1.8L
Scooby Specialist
 
Member#: 32
Join Date: Jun 1999
Post

Hello,

I'm so insulted. Y'all don't remember my car. Sheesh. L model. What do you think I am, some foo foo plush luxury lover? L models are heavy! YEah! I have a base model. Mine came with a radio prep kit (wires, but no speakers or headunit even). And mine's a '95.

As for the tranny... '99 saw the introduction of the 7 bolt pattern from the 4 bolt older trannies. The 7 bolt uses the same 4 bolts plus three more. The 7 and 4 bolt setups use the same dowels. So the 7 is held in by 4 bolts, plus the dowels, plus a bonus 3 more bolts. Those three holes on the tranny housing don't match to anything on the older engines. To use a '99+ tranny on a -98 engine requires simply bolting up the 4 bolts... and adding a second bolt to hold the starter in place since on the older cars, the starter sits on a stud, while on the newer cars, it sits on a through bolt. To remedy that, you simply put a bolt sunken into the tranny facing out of the tranny as if it were coming from the engine and then secure the back side of the starter with a nut.

Then, as for diff differences, always check the ratio of the diff, too. I dunno if any current subarus use different final drive ratios but it sucks to discover you didn't match your ratios. Especially at 130 mph. Scary stuff! Not that I would know.

Joel

Edit: to answer the original question - yeah, 100% compatible. 2.2s and 2.5s use the same tranny, same axles, same everything!

[This message has been edited by Joel Gat, 1.8L (edited November 20, 2000).]
Joel Gat, 1.8L is offline   Reply With Quote
Old 11-20-2000, 11:50 PM   #18
ARG
Scooby Specialist
 
Member#: 386
Join Date: Oct 1999
Chapter/Region: SCIC
Location: Upstairs in the bedroom
Vehicle:
1999 Impreza RS-S
Rally Blue & Supercharged

Thumbs up

Here is some NEW and IMPORTANT news for you guys going to swap to a 2000 LSD into a 99. For 2000, Subaru completely redesigned the LSD. The early LSD's had a limited slip unit that mounted on one side of the spyder gears and this resulted in one axle being longer than the other.

The 2000 LSD has the clutch plates mounted INSIDE the outboard spyder gears. Freaken ingenious. The outboard spyder gears are larger and wider than the earlier models. What this means is that the 2000 LSD WILL WORK WITH 1999 AXLES. You don't have to buy 2000 axles in order to make the LSD work properly.

Why do I know this? Because I just put a 2000 LSD in my car and I ordered 2000 axles from a wrecking yard. I pulled the axles out of my 1999 RS and laid them side-by-side with the 2000 axles. No difference at all. So I spent an additional $300.00 for no reason. I called Don Heck, a Master Subaru Tech at Irvine Subaru, and he verified with Subaru tech line that the 2000 LSD does use 1999 axles.

So, anyone like a pair of "like new" rear axles for a good price? Will fit 99-00 Subaru.

ARG
ARG is offline   Reply With Quote
Old 11-21-2000, 07:10 AM   #19
rao
Scooby Specialist
 
Member#: 52
Join Date: Jun 1999
Location: Naperville, IL
Vehicle:
2005 Legacy GT
98 BMW 540i LS2/T56

Post

Sorry Joel Not bad though going from memory - I pulled my tranny over Thanksgiving weekend last year. 7, 8 - who's counting?
rao is offline   Reply With Quote
Old 11-22-2000, 07:53 AM   #20
Geoff
Warden of NASIOC Timeout
Super Moderator
 
Member#: 592
Join Date: Dec 1999
Chapter/Region: TXIC
Location: P-Ville, Texas
Vehicle:
'11 X5 xDrive35i
'09 135i 6MT/'15 GTI 6MT

Post

Well, the swap seems to be going well so far. I'll know by this afternoon how things went. So far, ARG is right, the axles are the same. Info came in handy since one of the guys at the yard sliced one of the axles they were going to give me open when removing it from the car...so I'm using my old axles.

The shift fork had to be changed to accomodate my OBS's cable-driven clutch vs. the RS's hydraulic...hopefully that will be the extent of the problems...everything looks to be going A-OK!
-Geoff
Geoff is offline   Reply With Quote
Old 11-22-2000, 11:19 AM   #21
Geoff
Warden of NASIOC Timeout
Super Moderator
 
Member#: 592
Join Date: Dec 1999
Chapter/Region: TXIC
Location: P-Ville, Texas
Vehicle:
'11 X5 xDrive35i
'09 135i 6MT/'15 GTI 6MT

Cool

Install went flawlessly! I'm off to pick up my car for the first (and last) time at West Houston.
-Geoff
Geoff is offline   Reply With Quote
Old 11-22-2000, 11:23 AM   #22
rao
Scooby Specialist
 
Member#: 52
Join Date: Jun 1999
Location: Naperville, IL
Vehicle:
2005 Legacy GT
98 BMW 540i LS2/T56

Thumbs up

Great news!
rao is offline   Reply With Quote
Old 11-22-2000, 06:43 PM   #23
Geoff
Warden of NASIOC Timeout
Super Moderator
 
Member#: 592
Join Date: Dec 1999
Chapter/Region: TXIC
Location: P-Ville, Texas
Vehicle:
'11 X5 xDrive35i
'09 135i 6MT/'15 GTI 6MT

Talking

Welp, I got the OBS back today!
Comments:

At 80MPh, I'm getting about 150-200 more RPM. No big deal.

I forgot how well a non-hacked-up transmission drives! I enjoy the car again.

...do I have the only OBS out there with a LSD in the rear now?
-Geoff
Geoff 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
Need help with installing replacement OEM rear springs on '99 OBS Ski4Ever Impreza Forum 0 06-26-2009 04:36 PM
Immediate Help Needed: APS CAI Dont Try To Run Factory 2.5L Turbo Powertrain (EJ Series Factory 2.5L Turbo) 5 03-23-2009 09:54 PM
Immediate Help Needed: APS CAI Dont Try To Run General Community 6 03-23-2009 05:08 PM
Help me find Motul fluids for STi tranny and LSD AlxSti Transmission (AT/MT) & Driveline 15 03-04-2007 04:12 PM
FS: 2000 RS tranny and rear LSD w/axles Thug Private 'For Sale' Classifieds 2 08-12-2004 01:13 PM

All times are GMT -4. The time now is 01:21 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2016, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2016 Axivo Inc.
Copyright ©1999 - 2016, North American Subaru Impreza Owners Club, Inc.