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Old 02-09-2000, 02:12 PM   #1
Miller3339
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Question Lower Gearing

Any Idea about where to get Lower gearing for my 92 Leagcy ??

Miller

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Old 02-09-2000, 03:53 PM   #2
PeteH
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The US spec Legacy turbo uses the 3:90 ratio. '93 Legacy "RS" and '97 Legacy "GT-B" uses 4:11. All of the STi's and the '96 Legacy "RS", '93 &'99 Legacy "GT-B" use the 4.44 ratio. And let's not forget the Imprezza 2.5RS uses the 4:11 as well.

Now if you are talking about the transmision gear ratios there are several STi gearbox's to choose from, check the SPD site.

PeteH
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Old 02-10-2000, 08:57 AM   #3
Miller3339
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for some reason, my messages are not getting posted on this thread. so I'll try again.

what the heck is a GT-B and where can I find a wrecked one?? or a 96 Legacy RS??

help!!
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Old 02-10-2000, 09:02 AM   #4
Submerk
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I think GT-B is a turbo version in Japan(twin turbo)
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Old 02-10-2000, 01:39 PM   #5
Shik
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Submerk is right. The GT-B was the twin turbo wagon that was fitted with "tuned" Bilstein struts, hence the "B" . The Legacy RS was the single turbo Legacy sedan from 89-92 and then was twin turbo'd from 93 to 98.
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Old 02-10-2000, 02:01 PM   #6
Miller3339
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So, I'm pretty much hosed for the 4.44 gears. I've heard that the standard legacy had 4.11's but they do not have the hydralic clutch so I cant swap the Tranny and 3rd member. how about the Impreza can I swap the Tranny and rear Diff.?? or swap the internals?? any help would be appriciated.

Miller
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Old 02-10-2000, 03:17 PM   #7
Patrick Olsen
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From what I understand the recent Legacy 2.5GT's and Impreza 2.5RS's have 4.11s in the 5 speeds and 4.44s in the automatics. I assume the differentials (front and rear) are the same with either tranny - I know the center diff is different, but the front and rear should be the same. So, there are 4.44s out there if that is what you want.

Pat Olsen
'99 Legacy 2.5GT 5 speed sedan
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Old 02-10-2000, 10:11 PM   #8
Submerk
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Miller, your rear differential is LSD, why you want to change it?
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Old 02-11-2000, 02:18 AM   #9
Shik
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Miller, FWIW, the majority of transmission internals were the same between the turbo and non-turbo tranny so it may be possible just to switch diffs and still keep your original tranny, not totally sure though. For the work that is involved though, maybe it would just be easier to pick up a WRX-RA tranny( 4.44's I believe and should bolt right up). Then just pick up a rear diff.

BTW Submerk, according to Subaru, only the 91's had rear LSD's.
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Old 02-11-2000, 10:57 AM   #10
Miller3339
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the question is where can I find a WRX-RA tranny?? I'm going to see how hard it would be to swap the internals from a 2.5GT or RS and see if the Gears from the Automatic would work. if so then your right all I need is the rear Diff, and a whole lot of Labor. I'd much rather have the 4.44 gears from the auto, but the 4.11's would be good too. if the Auto internals will work maybe I can "Borrow" the ones from Sub_gal!!

SHIK, sorry for my ignorance but what does FWIW mean??

by the way if any of you have an Idea of where I can pick up 2 stock Rims from a Legacy Turbo I'd greatly appriciate it.

Submerk, I was under the impression like Shik that the 92 didn't have a LSD. I wonder if a 91 AUTO has a LSD and 4.44 gears and if they would swap with mine?? if so that would be the ticket.

my need for lower gears is because now at 80mph in 5th gear I'm still running under 2500RPM. I'd like to have more off the line.

thanks a bunch people and if you have any more suggestions keep them comming.
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Old 02-11-2000, 11:22 AM   #11
Submerk
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Miller, try to contact Aaron auto wrecking, he might have some. I think the 95-96 legacy outback also use the same wheel. Anyway this is his phone number 1-800-541-7271. He is in white center area. I believe he also can get the engine and trans from Japan because he has the EJ20 engine in stock. Also there is a guy in Vancouver, he tries to sell 91 engine, trans, ecu, and intercooler. The intercooler is from Minnam. I asked him about the intercooler for you but he want to sell with his engine. He said he got the STI Version V or IV.
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Old 02-11-2000, 02:20 PM   #12
Patrick Olsen
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Maybe I'm completely out to lunch here, but I think people are talking about changing more than needs to be changed. Can the front ring and pinion not be changed out, or does the front diff use some method other than a ring and pinion? I know it's inside the transmission, but I would think that, if it is a ring and pinion system, there has to be some way to swap them out without changing the whole transmission.

Pat Olsen
'99 Legacy 2.5GT 5 speed sedan
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Old 02-11-2000, 05:02 PM   #13
PeteH
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Question

Miller3339 wrote "my need for lower gears is because now at 80mph in 5th gear I'm still running under 2500RPM." What? According to Road&Track magazine at 60mph you should be turning 2480 rpm's, look here:
http://www.xmission.com/~dac/
Even with my 215/45/17's my '92 Turbo 5-sp is still within 200rpm's of stock, what's going on here?

Sorry guys, I still don't believe that my '92 doesn't have a rear LSD, maybe mine is a early '92 model and still has it? No one has yet to explain to me why when pushed hard it will leave four equal length black marks if it doesn't have LSD's. It may explain why I need to replace my clutch though............

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Old 02-11-2000, 09:14 PM   #14
euroauto
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Cheap way: How about small tires that stick way outside the wheel openings with gold plated wire wheels!
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Old 02-11-2000, 10:49 PM   #15
Submerk
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I still think 92 has LSD because one of the guy I know he owns 92 or 93, he has a rear LSD. I think 91 5spd has both front and rear LSD. Automatic and any 92+ have only rear LSD. This information I got it from Turbomagazine and a guy who owns 92. So PeteH maybe you can take a look at you rear diff, and lets us know. If it has, it should say LSD on it. I will take a look at Miller car this weekend at autocross, if he goes.
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Old 02-15-2000, 05:20 AM   #16
Flatfour
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I have a 92 turbo 5spd and it most definately did not have LSD Rear. I actually built one from the old RX-Turbo units by swaping the ring gear.I dont know how strong the unit is but its been in 2 years now and performs beautifully. Its not viscous but rather a clutchpac type and will still hold and lay down rubber with one side raised, so plenty strong..and if it fails I have 3 more of them because scrap yards round here virtually give em away ($20) so I buy every unit I find..

Quote:
Originally posted by PeteH:
Miller3339 wrote "my need for lower gears is because now at 80mph in 5th gear I'm still running under 2500RPM." What? According to Road&Track magazine at 60mph you should be turning 2480 rpm's, look here:
http://www.xmission.com/~dac/
Even with my 215/45/17's my '92 Turbo 5-sp is still within 200rpm's of stock, what's going on here?

Sorry guys, I still don't believe that my '92 doesn't have a rear LSD, maybe mine is a early '92 model and still has it? No one has yet to explain to me why when pushed hard it will leave four equal length black marks if it doesn't have LSD's. It may explain why I need to replace my clutch though............

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Old 02-15-2000, 06:34 AM   #17
Radio Flyer
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Miller -

FWIW: For What It's Worth

Now, then, what the heck is: YMMV?! Your M??? May Vary?

Maybe webbreviations should be put into the FAQ as well...

And running <2500 at 80 mph? Wow. At that point, I'm turning close to 3700. I'd rather like a taller final gear (though maybe not quite that tall...)

**- Eric
****'98 2.5 GT Wagon - <a href="http://208.9.184.110/MembersList/ViewMemberPics.cfm?MemberID=143" target="_blank">Pics</a> - <a href="http://users.vei.net/lanam/eric/radioflyer.htm" target="_blank">Page</a> -
****ICQ: 9292601

[This message has been edited by Radio Flyer (edited February 15, 2000).]
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Old 02-16-2000, 12:48 AM   #18
Miller3339
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I'll get the numbers tonight on my way home.
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Old 02-18-2000, 04:52 PM   #19
PeteH
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Submerk, I checked my rear diff but there is no mention of the letters "LSD" anywhere on the tag, I assume this is where it would be?

Flatfour, is the RX-7 Turbo diff a direct "bolt-in" other than the ring swap? Which years will fit? How difficult is it to swap?
If properly pushed my '92 will leave four equal length black marks, how can it do this if it doesn't have LSD's???????

PeteH
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Old 02-19-2000, 01:59 AM   #20
Shik
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Pete, I think Flatfour was talking about the old Subaru RX's that all came with LSD's in the rear, maybe not though. If so, they were made from 85 to 88(?).

As for your burn out marks, I was under the assumption that all four wheels do get some degree of power sent to them but on the non LSD cars, when it comes to transfering the power, it goes to the wheels with the least resistance, not both like a LSD would have happen. Maybe on a surface like a garage floor where all four wheels are on nearly identical surfaces, there is no "transfering" from side to side since one side has no better or worse traction then the other. I don't know, I'm just throwing things around. Maybe you could try and find some fairly deep snow and have someone check the rear wheels out when you are in it?
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Old 02-19-2000, 07:43 AM   #21
PeteH
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Lightbulb

Thanks for clearing up the "RX" question for me Shik :-) What is your opinion on this swap, do you think the 'plate type' diff has any advantages of the 'viscous' setup? I believe the STi Imp's still use the 'mechanical' type rear diff, I wonder what the advantage is, quicker reaction? stronger 'lock-up'?

When I first bought the car 8 months ago I took my buddy for a ride, I placed the two passanger side wheels off the side of the road on the gravel and took off hard with NO wheel spin..........I will go play in the snow and have someone watch, the debate rages on............:-)
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Old 02-19-2000, 08:24 AM   #22
Flatfour
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SubMerk,
Yeah the swap is a direct bolt in, no problem at all. Essentially I took my open 3.9 carrier out,removed its ring gear, mounted the 3.9 gear on the 3.7 (rx)LSD carrier, then re-installed into the 3.9 unit. The hardest part was finding the tool to remove bolt which runs through the center of the axle stubs to get the carriers out. Its a "Torx" (#10 I think But I can check) socket but I needed to use 1/4" drive socket to get access. It was very hard to find, but I finnaly got it from "snap-on".

The surest way I can think of the check your current rear (apart from taking it off and tearing it open) might be to disconnect the driveshaft, then raise only one side of the rear and try to turn it. My unit is so strong it took a 4' bar to get the plates to slip! Plenty strong. The open rear would just free spin. I disconnect the shaft to completely isolate the rear diff by itself, because drivetrain drag through the center diff, etc, can be enough to trick you into thinking its LSD.

If your rear has a tag, LSD,in LARGE letters would be very obvious. I dont know when they dropped the id tags.

Also, there's a night and day difference in the way the car corners and drives with the LSD...Oversteer Oversteer, so much fun!

These old units are gettin harder to find round here though because there's quite a few XT6 owners now snagging them as a direct bolt in, same ratio..

Flatfour.


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