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Old 05-02-2001, 10:51 PM   #1
Jonathan
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Member#: 4021
Join Date: Feb 2001
Chapter/Region: NESIC
Location: Natick, MA USA
Vehicle:
1999 Legacy GT Ltd
Quick Silver Metallic

Post 97 - 99 Subaru Legacy GT Final Drive ratios ?

Somewhere I read that my 5spd (like all Legacy GT Limiteds) has a 4:40 to 1 Final drive, while the regular GT has a 4:11 to 1 Final drive. My understanding is that the Limited's 5th gear set is slightly taller so that at highways speed the two cars perform the same, but the Limited accelerates a shade faster. Nobody believes me though.

I took a quick peak at my tach in both 3rd and 5th gear while travelling at 70 MPH, and here is what I found :

3rd gear 70 MPH = 5900 RPM

5th gear 70 MPH = 3100 RPM

I know some of you rarely bother to travel so slowly... but as a personal favor to me, could you manage to slow down to 70 and give me your engine speeds ?

I think this is the best way of answering my question as to whether or not the limited & the regular GT are geared the same or not.

Thanks very much !

- Jonathan

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Old 05-03-2001, 05:13 AM   #2
JoeT
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Location: Toronto, Ontario, Canada
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2000 Turbo Legacy GT
Titanium

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I emailed Subaru of America about the 2000 Legacy GT.

The response they gave me was 4.11 for the final drive ratio.

The only difference between final drive ratios on the GT of you model year is between the automatic and the manual.

Traditionally in Canada the Limited is sold only as an automatic and has a final drive ratio of 4.44 and all GT manual (5 Speed) have 4.11.

Email Subaru of America through their web site, I got a response within 1 day.

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Old 05-03-2001, 09:09 AM   #3
subarurabbit
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Jonathan,

you have a 4.11 with your 5spd manual.
4spd autos (including Limiteds) have 4.44.

if you really want to know, put your car in neutral on a lift an rotate the tires 10 times. If you coun't 41 revs of the axle, you have 4.11, 44 revs and you have 4.44.

Roger
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Old 05-04-2001, 06:35 AM   #4
Patrick Olsen
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1997 Legacy 2.5GT
QuickSilver Metallic

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OK, I checked on my way to work this morning. At 70mph in 3rd I'm at about 5850rpm, and at 70mph in 5th I'm at about 5150. Close enough for government work (and eye-balling the gauges at speed).

Just to further check things, here's what my speed is at 3000rpm in each gear:
1st - 15mph
2nd - 25.5mph
3rd - 36mph
4th - 48.5mph
5th - 68.5mph

Obviously I'm guesstimating on those xx.5 numbers, but that should be close enough to give you an idea of all 5 gear ratios. I think you'll find that what JoeT and Roger said is correct. It would be cool if the Limited had a special gearset, but I doubt that Subaru would bother for such a limited (hehe) number of vehicles.

Pat Olsen
'97 Legacy 2.5GT sedan
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Old 05-04-2001, 10:27 AM   #5
Jonathan
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1999 Legacy GT Ltd
Quick Silver Metallic

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Thanks, Patrick.

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Old 05-07-2001, 06:49 PM   #6
rrubel
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2008 Legacy Outback
Atlantic Blue Pearl

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These are the gearings for 97; they should be identical to a 99.
5-speed manual: 4-speed auto:
1- 3.545 3.027
2- 2.111 1.619
3- 1.448 1.000
4- 1.088 .694
5- .871(OB)/.780 rest N/A
FD- 4.111 4.44

So there is some difference between the Outback and all the other models, but that's it.
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Old 05-08-2001, 06:56 AM   #7
Patrick Olsen
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1997 Legacy 2.5GT
QuickSilver Metallic

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Wow, so the Outback actually has a shorter 5th gear, huh? Where did you find that info, if you don't mind my asking? Can anyone explain why Subaru would have done that? That seems weird to me, and off the top of my head I can't figure out why you would want a significantly shorter 5th gear like that in the Outback.

That shorter 5th gear would be kinda nice for open track events. At VIR I was easily into 5th on both the front and back straights, but acceleration was just about non-existent once I shifted to 5th. I wonder how much of a difference (if any) it would make. Figuring on a 6250rpm shift from 4th to 5th, that would put me at about 5000rpm rather than 4500rpm - a pretty big difference. Torque peaks at 4200rpm I think, but I think power would still be higher at 5000rpm than it is at 4500rpm. Hmmmm, I think I'm gonna refer this one to the N/A Powertrain Forum for further discussion.

Pat
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Old 05-08-2001, 07:35 AM   #8
subarurabbit
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Well, the Outback has 205/70-15 tires.

1st and 2nd gen Legacies were 185/70 r14, 195/60 r15, and 205/55 r16

Roger

[This message has been edited by subarurabbit (edited May 09, 2001).]
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Old 05-08-2001, 06:01 PM   #9
Patrick Olsen
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1997 Legacy 2.5GT
QuickSilver Metallic

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Yeah, the tires, I hadn't even thought about that. Pretty obvious now that I've read it.

Pat
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Old 05-08-2001, 07:55 PM   #10
Jonathan
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1999 Legacy GT Ltd
Quick Silver Metallic

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Wasn't there also a low-end version of the Legacy (the Brighton ?) that featured the wimpy 2.2 Liter engine and had a fairly tall 3:90 to 1 final drive ratio ?

Such a setup would certainly give the Legacy GT some nice cruising gears (although certianly at the expense of acceleration).
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Old 05-08-2001, 08:24 PM   #11
rrubel
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2008 Legacy Outback
Atlantic Blue Pearl

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Jonathan, those ratios were for all '97 2.5l Legacys (OB, GT, LSi). You're correct in that the 2.2l (brighton, L) had different final drive of 3.90 for the 5-speed, though the other gears were the same. The auto 2.2l has final drive of 4.11, same as 2.5l 5-speed, and different 1st and 2nd gears (2.785 and 1.545 vs 3.027 and 1.619 for 2.5l).

Pat, the data comes from a dealer specifications guide that a salesman friend gave me. They update them every year; I have a 97 here and a 98 lost somewhere (97 is green cover, 98 is blue cover). It has all the numbers on all the models in a pocket-sized volume. Next time I'm at the dealer, I'm going to try to get a 2001 (they only give them away after the MY has sold out).
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