Home  |  Forums  |  914 Info  |  Blogs
 
914World.com - The fastest growing online 914 community!
 
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG. This site is not affiliated with Porsche in any way.
Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners.
 

Welcome Guest ( Log In | Register )

2 Pages V < 1 2  
Reply to this topicStart new topic
> Subaru 5 and new 6 speed cable shift info, The new 6 speed split case.
partwerks
post Aug 4 2022, 06:49 PM
Post #21


Senior Member
***

Group: Members
Posts: 1,593
Joined: 7-September 06
From: Grand Island, NE
Member No.: 6,787



QUOTE(Amenson @ Apr 27 2021, 01:29 PM) *

From what I can find online the difference is the final drive.

WRX is 4.11
Forrester is 4.44

With the engine you are building Doug...you definitely don't want the 4.44.


What do those numbers translate to in the final drive?
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
partwerks
post Aug 4 2022, 09:41 PM
Post #22


Senior Member
***

Group: Members
Posts: 1,593
Joined: 7-September 06
From: Grand Island, NE
Member No.: 6,787



QUOTE(914Subaru @ Apr 9 2022, 07:30 AM) *

Subarugears.com has a lot of good information on Subaru gear ratios and a calculator.
Both the 5-speed and 6-speed split case have been made with 3.90, 4.11 and 4.44 final drive ratios. For me I choose the 3.90.

This is one comparison of the 5 and 6 speed ratios to give you an idea of the difference.
5MT non Turbo 3.45 / 2.06 / 1.45 / 1.09 / 0.78
6MT non Turbo 3.45 / 1.94 / 1.30 / 0.97 / 0.82 / 0.69



So is the MT5, or the 6 speed TY751, the better option?
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
partwerks
post Aug 5 2022, 08:23 PM
Post #23


Senior Member
***

Group: Members
Posts: 1,593
Joined: 7-September 06
From: Grand Island, NE
Member No.: 6,787



QUOTE(914Subaru @ Feb 6 2021, 07:10 PM) *

I haven't driven a 6-speed yet but my thought is if you already have a 5-speed it's not worth the upgrade but if your just starting a project it's worth considering. One advantage is the cable linkage is built into the transmission and you can use the Subaru shift lever. They are newer and easy to find low mile ones. The information I have found so far is first and second gears are wider and stronger than early 5-speeds, 1-4 is the same ratio, 5th is lower and the added 6th gives you lower RPM's at highway speed.










Do you have pictures of the shifter?
If it doesn't have a speed sensor, is the sensor, and magnet like some setup, another way of doing it?
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
partwerks
post Aug 5 2022, 08:25 PM
Post #24


Senior Member
***

Group: Members
Posts: 1,593
Joined: 7-September 06
From: Grand Island, NE
Member No.: 6,787



QUOTE(Amenson @ Apr 27 2021, 01:29 PM) *

From what I can find online the difference is the final drive.

WRX is 4.11
Forrester is 4.44

With the engine you are building Doug...you definitely don't want the 4.44.


Which is better for lower rpm's in the road gear?
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
76-914
post Aug 6 2022, 08:08 AM
Post #25


Repeat Offender & Resident Subaru Antagonist
**********

Group: Members
Posts: 13,455
Joined: 23-January 09
From: Temecula, CA
Member No.: 9,964
Region Association: Southern California



QUOTE(partwerks @ Aug 5 2022, 07:25 PM) *

QUOTE(Amenson @ Apr 27 2021, 01:29 PM) *

From what I can find online the difference is the final drive.

WRX is 4.11
Forrester is 4.44

With the engine you are building Doug...you definitely don't want the 4.44.


Which is better for lower rpm's in the road gear?

Given the 2 choices from above, the 4.11 would be. If your going 5 speed there are several 3.9 final drive transmissions and two 3.6. Here is a shopping list. https://www.rallispec.com/downloads/Transmi...hart_Public.pdf
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
partwerks
post Sep 19 2022, 09:17 PM
Post #26


Senior Member
***

Group: Members
Posts: 1,593
Joined: 7-September 06
From: Grand Island, NE
Member No.: 6,787



QUOTE(76-914 @ Aug 6 2022, 06:08 AM) *

QUOTE(partwerks @ Aug 5 2022, 07:25 PM) *

QUOTE(Amenson @ Apr 27 2021, 01:29 PM) *

From what I can find online the difference is the final drive.

WRX is 4.11
Forrester is 4.44

With the engine you are building Doug...you definitely don't want the 4.44.


Which is better for lower rpm's in the road gear?

Given the 2 choices from above, the 4.11 would be. If your going 5 speed there are several 3.9 final drive transmissions and two 3.6. Here is a shopping list. https://www.rallispec.com/downloads/Transmi...hart_Public.pdf


I don't see any with a FD of 3.6. I only see one 3.7, but that year is a push style.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
partwerks
post Oct 27 2022, 08:26 PM
Post #27


Senior Member
***

Group: Members
Posts: 1,593
Joined: 7-September 06
From: Grand Island, NE
Member No.: 6,787



QUOTE(76-914 @ Aug 6 2022, 06:08 AM) *

QUOTE(partwerks @ Aug 5 2022, 07:25 PM) *

QUOTE(Amenson @ Apr 27 2021, 01:29 PM) *

From what I can find online the difference is the final drive.

WRX is 4.11
Forrester is 4.44

With the engine you are building Doug...you definitely don't want the 4.44.


Which is better for lower rpm's in the road gear?

Given the 2 choices from above, the 4.11 would be. If your going 5 speed there are several 3.9 final drive transmissions and two 3.6. Here is a shopping list. https://www.rallispec.com/downloads/Transmi...hart_Public.pdf


I didn't see any with the 3.6 final drive?
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
76-914
post Oct 29 2022, 07:13 PM
Post #28


Repeat Offender & Resident Subaru Antagonist
**********

Group: Members
Posts: 13,455
Joined: 23-January 09
From: Temecula, CA
Member No.: 9,964
Region Association: Southern California



QUOTE(partwerks @ Oct 27 2022, 07:26 PM) *

QUOTE(76-914 @ Aug 6 2022, 06:08 AM) *

QUOTE(partwerks @ Aug 5 2022, 07:25 PM) *

QUOTE(Amenson @ Apr 27 2021, 01:29 PM) *

From what I can find online the difference is the final drive.

WRX is 4.11
Forrester is 4.44

With the engine you are building Doug...you definitely don't want the 4.44.


Which is better for lower rpm's in the road gear?

Given the 2 choices from above, the 4.11 would be. If your going 5 speed there are several 3.9 final drive transmissions and two 3.6. Here is a shopping list. https://www.rallispec.com/downloads/Transmi...hart_Public.pdf


I didn't see any with the 3.6 final drive?

They are 3.7 not 3.6. Probably about 2mph difference at 3300 rpm. There is a calculator on this site that will show you the engine rpm at "X" mph using whatever tire size you are running. I think once you see the minor difference you will not be so concerned with the difference. Which TY model number were you looking at that is a push style rather than the pull style?
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
eric914
post Oct 30 2022, 09:00 AM
Post #29


Member
**

Group: Members
Posts: 381
Joined: 28-January 04
From: Waynesville OH
Member No.: 1,613
Region Association: Upper MidWest



QUOTE(jeff @ Apr 10 2022, 08:25 AM) *

How difficult would this be to put behind a type iv or a Porsche 6 ? I think some of the Subaru transmissions have pull clutch levers ,some have push levers. Flywheel,clutch and starter differences. Do people swap out the pedal assembles for hydraulic clutch types?


I had the same thought. I have a 3.2 6 in my car and fear really pushing it. Years ago, I started down the Suby conversion path and still have a 1998 JDM 2L WRX motor with a Kennedy engineered products motor adaptor plate and clutch sitting in the corner of the garage. I wonder if the 914 clutch disk would fit in the Suby clutch assembly?
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
76-914
post Oct 30 2022, 02:17 PM
Post #30


Repeat Offender & Resident Subaru Antagonist
**********

Group: Members
Posts: 13,455
Joined: 23-January 09
From: Temecula, CA
Member No.: 9,964
Region Association: Southern California



QUOTE(eric914 @ Oct 30 2022, 08:00 AM) *

QUOTE(jeff @ Apr 10 2022, 08:25 AM) *

How difficult would this be to put behind a type iv or a Porsche 6 ? I think some of the Subaru transmissions have pull clutch levers ,some have push levers. Flywheel,clutch and starter differences. Do people swap out the pedal assembles for hydraulic clutch types?


I had the same thought. I have a 3.2 6 in my car and fear really pushing it. Years ago, I started down the Suby conversion path and still have a 1998 JDM 2L WRX motor with a Kennedy engineered products motor adaptor plate and clutch sitting in the corner of the garage. I wonder if the 914 clutch disk would fit in the Suby clutch assembly?

Some people do switch out pedal assemblies but it isn't necessary. You can easily convert your 914 pedal cluster to hydraulic. You will use the old clutch tube as the conduit for the AN-3 hydraulic hose. Conversely you can convert the old cable system to work with a Subaru transmission. I don't recommend this as it is more difficult than converting to hydraulic and you are left with the problematic cable or clutch tube weld failing. (IMG:style_emoticons/default/beerchug.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
kerensky
post Nov 1 2022, 03:56 PM
Post #31


Senior Member
***

Group: Members
Posts: 531
Joined: 1-February 06
From: Norman, OK
Member No.: 5,508
Region Association: Southwest Region



QUOTE(eric914 @ Oct 30 2022, 10:00 AM) *

I have a 3.2 6 in my car and fear really pushing it. Years ago, I started down the Suby conversion path and still have a 1998 JDM 2L WRX motor with a Kennedy engineered products motor adaptor plate and clutch sitting in the corner of the garage. I wonder if the 914 clutch disk would fit in the Suby clutch assembly?

Dibs on your 3.2? (IMG:style_emoticons/default/biggrin.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
partwerks
post Nov 2 2022, 07:26 PM
Post #32


Senior Member
***

Group: Members
Posts: 1,593
Joined: 7-September 06
From: Grand Island, NE
Member No.: 6,787



QUOTE(76-914 @ Oct 29 2022, 05:13 PM) *

QUOTE(partwerks @ Oct 27 2022, 07:26 PM) *

QUOTE(76-914 @ Aug 6 2022, 06:08 AM) *

QUOTE(partwerks @ Aug 5 2022, 07:25 PM) *

QUOTE(Amenson @ Apr 27 2021, 01:29 PM) *

From what I can find online the difference is the final drive.

WRX is 4.11
Forrester is 4.44

With the engine you are building Doug...you definitely don't want the 4.44.


Which is better for lower rpm's in the road gear?

Given the 2 choices from above, the 4.11 would be. If your going 5 speed there are several 3.9 final drive transmissions and two 3.6. Here is a shopping list. https://www.rallispec.com/downloads/Transmi...hart_Public.pdf


I didn't see any with the 3.6 final drive?

They are 3.7 not 3.6. Probably about 2mph difference at 3300 rpm. There is a calculator on this site that will show you the engine rpm at "X" mph using whatever tire size you are running. I think once you see the minor difference you will not be so concerned with the difference. Which TY model number were you looking at that is a push style rather than the pull style?


Sounds like they only made the one I wanted for two years, but is the push style, and not the pull.
https://www.pmpautogroup.com/product-p/ty754vw7aa.htm

Is it possible to put a 3.7 FD, into a trans that has a 3.9?
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
partwerks
post Nov 2 2022, 07:37 PM
Post #33


Senior Member
***

Group: Members
Posts: 1,593
Joined: 7-September 06
From: Grand Island, NE
Member No.: 6,787



QUOTE(914Subaru @ Apr 27 2021, 12:17 PM) *

QUOTE(914Subaru @ Apr 27 2021, 02:12 PM) *

QUOTE(914Subaru @ Apr 27 2021, 02:07 PM) *

QUOTE(CptTripps @ Apr 27 2021, 01:09 PM) *

For example: Would this one work? Non-STI 6sp from 2015

https://www.ebay.com/itm/402674382802?epid=1039500073


That should work, it is a split case. I found no difference in the WRX Non STI to the Forester other than the price is a lot more than the Forester. I have yet to find gear ratios for these boxes and they maybe different between the Forester and WRX.

For reference here is a picture of the conversion parts I have from Subaru Gears out of Australia.


One more picture



So all Subaru transmissions are AWD, or do they make a FWD?
These parts convert the AWD?
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
914Subaru
post Jan 17 2023, 12:15 PM
Post #34


Member
**

Group: Members
Posts: 59
Joined: 19-October 08
From: Duluth, MN
Member No.: 9,667
Region Association: Upper MidWest



Attached Image
Attached Image
Now there is a kit to use the STI transmission.
The STI transmission is the ultimate when it comes to Subaru boxes. There has been someone in this group that has made their own kit that requires some welding and advanced talent for sure. Now being easier I would consider this kit if I was to do another. Although a new engine transmission cradle would need designed.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Chris914n6
post Jan 17 2023, 03:41 PM
Post #35


Jackstands are my life.
****

Group: Members
Posts: 3,287
Joined: 14-March 03
From: Las Vegas, NV
Member No.: 431
Region Association: Southwest Region



QUOTE(partwerks @ Nov 2 2022, 05:26 PM) *

Sounds like they only made the one I wanted for two years, but is the push style, and not the pull.
https://www.pmpautogroup.com/product-p/ty754vw7aa.htm

Is it possible to put a 3.7 FD, into a trans that has a 3.9?

I was looking into that too. But it's really only 200 rpm at 90 mph in 5th and a few mph difference at redline in each gear. 10 mph at top speed. Not worth the trouble.
3.9 vs 4.4 that's a different story.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
ahycaramba
post Jan 18 2023, 10:59 PM
Post #36


“I live my life a quarter mile at a time.”
**

Group: Members
Posts: 161
Joined: 17-March 15
From: Murrieta, California
Member No.: 18,534
Region Association: Southern California



QUOTE(Amenson @ Apr 27 2021, 01:29 PM) *

From what I can find online the difference is the final drive.

WRX is 4.11
Forrester is 4.44

With the engine you are building Doug...you definitely don't want the 4.44.



I'm really confused (IMG:style_emoticons/default/confused24.gif) I been using the calculator on subarugears website. According to my calculations on a 5 speed manual trans why would you want a final drive of 4.44 or 4.11 that tops out early at 113 mph or so in 5th gear @ 5000 rpm but when you have a final drive of 3.54 or 3.9 that will get you a top speed of around 130 mph at 5000 rpm.
Am I missing something? STI and WRX run F/D of 4.11 or 4.44 and cost much more than 3.54 or 3.90. Shifting points on a F/D 3.90 or 3.54 seem to be more desirable than the 4.11 or 4.44.
am I wrong and would I be losing power / torque due to taller gears?
User is offlineProfile CardPM
Go to the top of the page
+Quote Post

2 Pages V < 1 2
Reply to this topicStart new topic
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:

 



- Lo-Fi Version Time is now: 28th March 2024 - 05:04 PM