Welcome to the North American Subaru Impreza Owners Club Wednesday January 29, 2020
Home Forums Images WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Go Back   NASIOC > NASIOC Subaru Models > Baja Forum

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.







* As an Amazon Associate I earn from qualifying purchases. 
* Registered users of the site do not see these ads. 
Reply
 
Thread Tools Display Modes
Old 01-09-2012, 06:07 PM   #1
subeman90
Scooby Specialist
 
Member#: 65681
Join Date: Jul 2004
Chapter/Region: MAIC
Location: Akron PA
Vehicle:
13 XV Limited
gray

Default Changed my 5th gear ratio (manual, non-turbo)

So ever since I bought my Baja I have wished it turned fewer revs on the highway. Really I think the gas mileage is not that great either. I decided a long time ago I was going to do something about this someday. Well someday was finally last week Jan 5th 2012. Long story short I have a great friend that works at a Subaru dealer and he was nice enough to order me in some 5th gear sets for my Baja. In the picture below from left to right is a WRX .738, impreza .78, and Baja factory .85 5th gear sets. Part numbers are on the boxes in the pics if you are interested.


Here are a few pics of the inside of your manual transmission (5th gear is the one hanging off the end of the pic (sorry not my pic but borrowed from the net) and a pic of the case together with 5th gear exposed:




Now I am not going to sit here and tell you how to do this. Quite honestly I had a shop do it as I have no time for this nor can my car be down for an extended time frame. Here is what I can tell you. The transmission DOES NOT have to come out (unless you want to go that route) and those gears are kind of pressed on but a little heat and gentle love made mine come out. I had an independent Subaru mechanic do this for me and he charged me for 6 hours of labor. There were a few test drives in there and he was going into uncharted waters so I have no problem putting some extra $$$ in his pocket. In the end though...here are the numbers that matter to us.

Here are my numbers: ( speed, revs old, revs new) I installed the .738 set
40 1800 1600
50 2300 1950
60 2800 2350
70 3350 2800
80 3800 3250
90 4250 3550
100 4850 4000

So with that being said I have no data for gas mileage. I filled the tank and parked it for the weekend and I really have no plans for any good highway trips for awhile.

here is a pic of a semi-legal speed with the new gears in it.


here are the links for 3 videos that were shot on the test track (#1 is before, #2 is after in the lower speeds, and #3 is after in the upper speeds)


subeman90 is offline   Reply With Quote
Old 01-09-2012, 06:17 PM   #2
steven765
Scooby Specialist
 
Member#: 105920
Join Date: Jan 2006
Location: Somewhere in the Northeast
Vehicle:
2006 Baja 5 Speed

Default

I'm really curious once you get some mpg data.
steven765 is offline   Reply With Quote
Old 01-09-2012, 06:30 PM   #3
subeman90
Scooby Specialist
 
Member#: 65681
Join Date: Jul 2004
Chapter/Region: MAIC
Location: Akron PA
Vehicle:
13 XV Limited
gray

Default

Quote:
Originally Posted by steven765 View Post
I'm really curious once you get some mpg data.
you and me both. I just wish I have the time (and gas wasn't so expensive) to just pi$$ a tank away and get a base line.

I've got a trip planned for middle Feb to Maine and most of the "New England" states. That will tell the tale for sure.
subeman90 is offline   Reply With Quote
Old 01-09-2012, 09:39 PM   #4
hocrest
Scooby Newbie
 
Member#: 40687
Join Date: Jul 2003
Location: PA
Default

Have you tried to accelerate from 60 on any highway hills yet? I have a 5 spd with the .78 and if I'm cruising 70 and someone pulls out in front of me, it struggles a little to get back to cruising.

But then you don't have any real hills down there. Bring it up here and we'll race around on 81.
hocrest is offline   Reply With Quote
Old 01-09-2012, 10:09 PM   #5
subeman90
Scooby Specialist
 
Member#: 65681
Join Date: Jul 2004
Chapter/Region: MAIC
Location: Akron PA
Vehicle:
13 XV Limited
gray

Default

I don't drive 60. I drive 75.

in all honesty though..I really haven't played with it. I've put maybe 50 miles on it so far.

Last edited by subeman90; 01-09-2012 at 10:12 PM. Reason: more comment
subeman90 is offline   Reply With Quote
Old 01-10-2012, 12:51 AM   #6
steven765
Scooby Specialist
 
Member#: 105920
Join Date: Jan 2006
Location: Somewhere in the Northeast
Vehicle:
2006 Baja 5 Speed

Default

How does it sound, any quieter at speed? Or does the wind noise blowing by our obnoxious barn door mirrors override it?
steven765 is offline   Reply With Quote
Old 01-09-2012, 06:28 PM   #7
tibug
Scooby Specialist
 
Member#: 273906
Join Date: Feb 2011
Chapter/Region: NESIC
Location: U.S. (Рос
Vehicle:
2018 Honda
Slow

Default

Very nice. Looks like you can cruise at 85 at the same RPMs that you could at 75 before. Nice change. I was not that happy with my Outback's fifth gear either, but I got used to it especially after I realized how gutless the engine is. It is nice to not have to downshift to go up the decently big highway hills in CT. That said, it would be very nice in flatter areas or long distance crusing to be able to 80 and not get horrendous gas mileage.
tibug is offline   Reply With Quote
Old 01-10-2012, 07:15 AM   #8
subeman90
Scooby Specialist
 
Member#: 65681
Join Date: Jul 2004
Chapter/Region: MAIC
Location: Akron PA
Vehicle:
13 XV Limited
gray

Default

it is a little quieter. The thing I was trying to get rid of was the roar of the engine at 75 and I have to say I believe I did.
subeman90 is offline   Reply With Quote
Old 01-10-2012, 04:41 PM   #9
littletruckthatcould
Scooby Newbie
 
Member#: 286614
Join Date: Jun 2011
Chapter/Region: Tri-State
Location: NY
Vehicle:
2005 baja sport
black/charcoal grey

Default

do you notice any difference in the 5th gear acceleration say on the highway with my car (non turbo 5 speed) at 3k im doing about 60-62 and to get to 75-80 doesnt take too long. with the gearing setup you chose is it any slower?
littletruckthatcould is offline   Reply With Quote
Old 01-10-2012, 05:54 PM   #10
subeman90
Scooby Specialist
 
Member#: 65681
Join Date: Jul 2004
Chapter/Region: MAIC
Location: Akron PA
Vehicle:
13 XV Limited
gray

Default

I'm sure it is slower but for some reason I feel like I have more torque pushing me along. I know it sounds strange though.
subeman90 is offline   Reply With Quote
Old 01-10-2012, 06:40 PM   #11
steven765
Scooby Specialist
 
Member#: 105920
Join Date: Jan 2006
Location: Somewhere in the Northeast
Vehicle:
2006 Baja 5 Speed

Default

What was the cost on the gear btw?
steven765 is offline   Reply With Quote
Old 01-10-2012, 08:19 PM   #12
subeman90
Scooby Specialist
 
Member#: 65681
Join Date: Jul 2004
Chapter/Region: MAIC
Location: Akron PA
Vehicle:
13 XV Limited
gray

Default

Quote:
Originally Posted by steven765 View Post
What was the cost on the gear btw?
the .78 is around $165 list and the .738 is right around $135 list. Both are approx. but close.

Better ratio is cheaper....YES!
subeman90 is offline   Reply With Quote
Old 01-10-2012, 06:46 PM   #13
Hawk296
Scooby Specialist
 
Member#: 14555
Join Date: Jan 2002
Chapter/Region: MWSOC
Location: MI
Vehicle:
1995 Impreza L
Baja

Default

Wow, never thought about just swapping 5th and never thought about the fact its accessible without pulling the trans. this would is tempting to do on my turbo if I can find an appropriate gear ratio in the Subaru line. It would not only lower RPM for cruise but also provide a little more top speed as it's currently limited by gearing.

Neat idea!
Hawk296 is offline   Reply With Quote
Old 01-10-2012, 11:55 PM   #14
twheats1
Scooby Newbie
 
Member#: 147722
Join Date: Apr 2007
Chapter/Region: MWSOC
Location: Rockford, IL
Vehicle:
11 Rug
00 R 1100RS

Default

Quote:
Originally Posted by Hawk296 View Post
Wow, never thought about just swapping 5th and never thought about the fact its accessible without pulling the trans. this would is tempting to do on my turbo if I can find an appropriate gear ratio in the Subaru line. It would not only lower RPM for cruise but also provide a little more top speed as it's currently limited by gearing.

Neat idea!
A few years ago I had to have bearings done on my trans. I looked into getting a taller 5th gear and found that the Turbos already have a .738 5th gear. (at least on my 04)
twheats1 is offline   Reply With Quote
Old 01-11-2012, 03:18 AM   #15
steven765
Scooby Specialist
 
Member#: 105920
Join Date: Jan 2006
Location: Somewhere in the Northeast
Vehicle:
2006 Baja 5 Speed

Default

Quote:
Originally Posted by twheats1 View Post
A few years ago I had to have bearings done on my trans. I looked into getting a taller 5th gear and found that the Turbos already have a .738 5th gear. (at least on my 04)
Prolly why the N/A gas mileage is not all that better than a trubo, but subaru thought people would want the power so they went with the .85 *shakes fist*
steven765 is offline   Reply With Quote
Old 01-11-2012, 07:17 AM   #16
subeman90
Scooby Specialist
 
Member#: 65681
Join Date: Jul 2004
Chapter/Region: MAIC
Location: Akron PA
Vehicle:
13 XV Limited
gray

Default

Quote:
Originally Posted by twheats1 View Post
A few years ago I had to have bearings done on my trans. I looked into getting a taller 5th gear and found that the Turbos already have a .738 5th gear. (at least on my 04)
but the turbos have a 4.44 diff so there goes any advantage.

We really need someone with a stock turbo Baja with stock tires to go out and do a few pulls like I did and put up a video.
subeman90 is offline   Reply With Quote
Old 01-11-2012, 10:49 AM   #17
Hawk296
Scooby Specialist
 
Member#: 14555
Join Date: Jan 2002
Chapter/Region: MWSOC
Location: MI
Vehicle:
1995 Impreza L
Baja

Default

Quote:
Originally Posted by twheats1 View Post
A few years ago I had to have bearings done on my trans. I looked into getting a taller 5th gear and found that the Turbos already have a .738 5th gear. (at least on my 04)
Bummer
Hawk296 is offline   Reply With Quote
Old 01-10-2012, 09:18 PM   #18
CosmoTheCat
Scooby Newbie
 
Member#: 3409
Join Date: Jan 2001
Chapter/Region: NWIC
Location: Oly
Vehicle:
98 My FMIC
Is bigger than yours.

Default

Nice.

I much preferred the 3.90 final drive in my '98 L 2.2 versus the 4.11 in my 01 2.5RS
CosmoTheCat is offline   Reply With Quote
Old 01-11-2012, 04:54 PM   #19
Benhart21
Scooby Specialist
 
Member#: 149617
Join Date: May 2007
Chapter/Region: RMIC
Location: Boulder-ish
Default

I was wondering about the turbo ratios. Off the top of my head, I want to say that at 70 mine is running ~3000 rpm. If I could lower them by swapping to the 3.90 all around, I'd gladly sacrifice the off the line performance. I spend more time cruising at 65-75 than I do trying to get up to speed quickly.
Benhart21 is offline   Reply With Quote
Old 01-17-2012, 09:34 AM   #20
Eskimo1
Scooby Newbie
 
Member#: 184198
Join Date: Jul 2008
Location: Central PA
Vehicle:
2013 XV Crosstrek
Orange!

Default

Quote:
Originally Posted by Benhart21 View Post
I was wondering about the turbo ratios. Off the top of my head, I want to say that at 70 mine is running ~3000 rpm. If I could lower them by swapping to the 3.90 all around, I'd gladly sacrifice the off the line performance. I spend more time cruising at 65-75 than I do trying to get up to speed quickly.
I agree...and think first gear is too short anyway! But I don't hate it enough to drop the trans and the rear end to swap gears.

subeman, I could take a video like you requested with her bone-stock turboB next month if no one gets back to you more quickly.
Eskimo1 is offline   Reply With Quote
Old 01-17-2012, 12:03 PM   #21
subeman90
Scooby Specialist
 
Member#: 65681
Join Date: Jul 2004
Chapter/Region: MAIC
Location: Akron PA
Vehicle:
13 XV Limited
gray

Default

Quote:
Originally Posted by Eskimo1 View Post
I agree...and think first gear is too short anyway! But I don't hate it enough to drop the trans and the rear end to swap gears.

subeman, I could take a video like you requested with her bone-stock turboB next month if no one gets back to you more quickly.
if you want to do that I would love to see what the turbo is doing. Thanks!

Where in Central PA are you?
subeman90 is offline   Reply With Quote
Old 01-21-2012, 11:38 PM   #22
Eskimo1
Scooby Newbie
 
Member#: 184198
Join Date: Jul 2008
Location: Central PA
Vehicle:
2013 XV Crosstrek
Orange!

Default

We're located near Bloomsburg.

And yeah, I'll take the vids, no problem. I'm always game for flogging a car..especially with a purpose!
Eskimo1 is offline   Reply With Quote
Old 01-31-2012, 04:56 PM   #23
Subie_Sleeper68
Scooby Specialist
 
Member#: 166403
Join Date: Dec 2007
Chapter/Region: Tri-State
Location: Center Valley Pa.
Vehicle:
2006 Baja Turbo
Silver 340 AWHP 365 AWTQ

Default

Is it even possible to change the ring & pinion setup in a Baja Turbo 5speed ?

I'd pull the trans & rear to go 3.90 or 4.11
Subie_Sleeper68 is offline   Reply With Quote
Old 01-31-2012, 04:59 PM   #24
subeman90
Scooby Specialist
 
Member#: 65681
Join Date: Jul 2004
Chapter/Region: MAIC
Location: Akron PA
Vehicle:
13 XV Limited
gray

Default

I'm sure it is but for the effort I'd try to get a used tranny and rear diff.

That is just my $.02 though
subeman90 is offline   Reply With Quote
Old 01-31-2012, 06:05 PM   #25
Subie_Sleeper68
Scooby Specialist
 
Member#: 166403
Join Date: Dec 2007
Chapter/Region: Tri-State
Location: Center Valley Pa.
Vehicle:
2006 Baja Turbo
Silver 340 AWHP 365 AWTQ

Default

Quote:
Originally Posted by subeman90
I'm sure it is but for the effort I'd try to get a used tranny and rear diff.

That is just my $.02 though
Ahhhh........ but my trans is PPG'd and has a KAAZ 1.5 LSD.

So swapping the ring & pinion in the trans is a must. An R180 rear WOULD be nice....
Subie_Sleeper68 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
Anyone know ratio of 5th gear in a Legacy SS? shemoves Legacy Forum 1 10-31-2006 07:17 PM
My 5th gear was acting stupid yesterday styng88 Mid Atlantic Impreza Club -- MAIC 6 02-03-2006 05:26 PM
How difficult to change from JDM 6th gear ratio to USDM? BADWRX Transmission (AT/MT) & Driveline 4 08-16-2003 12:46 PM
5th gear ratio? yamarocket630 Mid West Subaru Owners Club Forum -- MWSOC 1 07-02-2002 12:39 AM
Whats wrong with my 5th gear? Vitamin-K General Forum Archive 1 11-07-2000 12:10 AM

All times are GMT -4. The time now is 11:05 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2020 Axivo Inc.
Copyright ©1999 - 2019, North American Subaru Impreza Owners Club, Inc.

As an Amazon Associate I earn from qualifying purchases.