Jump to content


Welcome to Ultimate Subaru Message Board, my lurker friend!

Welcome to Ultimate Subaru Message Board, an unparalleled Subaru community full of the greatest Subaru gurus and modders on the planet! We offer technical information and discussion about all things Subaru, the best and most popular all wheel drive vehicles ever created.

We offer all this information for free to everyone, even lurkers like you! All we ask in return is that you sign up and give back some of what you get out - without our awesome registered users none of this would be possible! Plus, you get way more great stuff as a member! Lurk to lose, participate to WIN*!
  • Say hello and join the conversation
  • Subscribe to topics and forums to get automatic updates
  • Get your own profile and make new friends
  • Classifieds with all sorts of Subaru goodies
  • Photo hosting in our gallery
  • Meet other cool people with cool cars
Seriously, what are you waiting for? Make your life more fulfilling and join today! You and your Subaru won't regret it, we guarantee** it.

* The joy of participation and being generally awesome constitutes winning
** Not an actual guarantee, but seriously, you probably won't regret it!

Serving the Subaru Community since May 18th, 1998!

Guest Message by DevFuse
 

Photo
- - - - -

Single Range Trans Ratios?


  • Please log in to reply
12 replies to this topic

#1 lostinthe202

lostinthe202

    Currently Lost in the 510

  • Members
  • 1,094 posts
  • Oakland, Ca

Posted 22 January 2009 - 10:13 PM

I've got a push-button trans that is out of a mystery vehicle. It's currently in an '88 GL-10 which has a 3.7 rear diff (as it should). I have my doubts that 0the trans is also a 3.7, but really I have no idea. For all I know, all push-buttons are 3.7.

All the tranny charts I find are for the dual-range trans. Is there one for the single range stuff? Or failing that, is there a general rule for the push-button variety?

Thanks!

Will-

#2 monstaru

monstaru

    wow, relevance....

  • Members
  • 4,411 posts
  • OlyWa

Posted 22 January 2009 - 10:23 PM

oops,i just saw ratios, sorry

Edited by monstaru, 22 January 2009 - 10:28 PM.


#3 lostinthe202

lostinthe202

    Currently Lost in the 510

  • Members
  • 1,094 posts
  • Oakland, Ca

Posted 22 January 2009 - 10:38 PM

hahaha, thanks anyway!

#4 grossgary

grossgary

    Elite Master of the Subaru

  • Members
  • 19,890 posts
  • WV

Posted 22 January 2009 - 10:50 PM

if hte rear diff is 3.7 why wouldn't the trans be?

I have a single range PT4WD trans and it's a 3.7...or so I was told when i got it. you need one?

#5 subiemech85

subiemech85

    SIX STAR SERVICE

  • Members
  • 2,710 posts
  • down by the river

Posted 22 January 2009 - 11:12 PM

hopefully you can follow along:

ALL 4WD
A 3.545 39/11
B 1.947 37/19
C 1.366 41/30
D 0.972 35/36
E 0.780 32/41

R 3.416 41/26/12

DUAL RANGE
H 1.000 34/34
L 1.592 23/14 X 25/19 *1
L 1.196 20/22 X 25/19

FRONT REDUCTION GEAR
3.900 39/10
3.700 37/10 *3

REAR REDUCTION GEAR
3.700 37/10
3.900 39/10 *2

*1 For Station Wagon
*2 For MPFI model
*3 for TURBO model


all info from '85 fsm section 3-1 p. 8

looks like 3.9 SINGLE range is possible

#6 Phizinza

Phizinza

    Yip yip

  • Members
  • 3,867 posts
  • South Australia

Posted 22 January 2009 - 11:42 PM

On dry pavement can you stick it in 4wd and pull it back out? If it comes out while driving, then its the same diff ratio as the rear diff. If it doesn't you'll need to find some gravel and lean on that shifter pretty hard :)

#7 lostinthe202

lostinthe202

    Currently Lost in the 510

  • Members
  • 1,094 posts
  • Oakland, Ca

Posted 23 January 2009 - 07:29 AM

if hte rear diff is 3.7 why wouldn't the trans be?

I have a single range PT4WD trans and it's a 3.7...or so I was told when i got it. you need one?


The rear diff is a 3.7 but this car left the factory as an auto and the PO put a 5spd pushbutton in and lets just say that I have my doubts about his knowledge of all things subaru. He had no clue what the trans came out of.

I'm not going to be using it, I'll be using a 3.9 5spd D/R setup, but I want to try and identify it for whoever will be using it after me:)

I haven't pulled it out yet, I should be doing that this weekend, when I do what will help me identify it? I think bratman18 mentioned to me that turbo axles have a different spline count then N/A cars so if the splines indicate a turbo trans (I doubt the PO had the ability to replace the stub axles) then, if I read subiemech85's chart right, that would make it a 3.7 because all turbo trans regardless of type are 3.7?


On dry pavement can you stick it in 4wd and pull it back out? If it comes out while driving, then its the same diff ratio as the rear diff. If it doesn't you'll need to find some gravel and lean on that shifter pretty hard :)


No can do, there is no engine in the car. Thanks for the tip though!

Thanks!

Will-

#8 Txakura

Txakura

    Not the Stig

  • Members
  • 1,007 posts
  • Colfax, WA

Posted 12 February 2009 - 01:10 AM

how did this turn out? I have a push button 3.9, so yes, single range 3.9 is possible...

#9 mudduck

mudduck

    Subaru Nut

  • Members
  • 703 posts
  • Asheboro NC

Posted 12 February 2009 - 05:57 AM

how did this turn out? I have a push button 3.9, so yes, single range 3.9 is possible...


Yep, I got a 3.9 in my single range also.

#10 lostinthe202

lostinthe202

    Currently Lost in the 510

  • Members
  • 1,094 posts
  • Oakland, Ca

Posted 12 February 2009 - 08:15 AM

Well, no further info. I searched and searched to no avail for a single range trans chart (as I did before I posted). I didn't do much searching on the web in general. Frankly, since I won't be using this trans in the long run, I'm only willing to spend so much time on it. But I did find some threads that talk about taking out the drain plug and looking for a stamp on the ring gear of the front diff, or failing that marking one gear and counting teeth. This is what I'll do once I get the trans out of the car.

I realized SubieMech's chart only covers up to '85 so that leaves a lot of options open.

#11 Gloyale

Gloyale

    It's a sickness

  • Members
  • 9,243 posts
  • Corvallis, OR PNW

Posted 12 February 2009 - 12:12 PM

Okay so the car was properly installed in a Turbo car? Is that GL-10 a turbo? if so it IS likely a 3.7. Count the stub splines 25=turbo=3.7, 23=nonturbo=3.9

#12 subaruguru

subaruguru

    Scammer

  • Members
  • 1,642 posts
  • Yakima Wa,

Posted 12 February 2009 - 05:33 PM

yes what gloyale said count the stubs

#13 lostinthe202

lostinthe202

    Currently Lost in the 510

  • Members
  • 1,094 posts
  • Oakland, Ca

Posted 12 February 2009 - 10:28 PM

OK then, splines have been counted and there are 25 so turbo trans it is.

thanks

Will-




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users