4.44 rear diffs

[BLTZDU]

Hi there,

Just finished replacing my gearbox in a 1990 jdm mt rs legacy with a 1997 GTB gearbox (pn = ty752vbcaa) problem being new gearbox has a 4.44 ratio front diff and my existing rear diff is 4.11, now i know that this will not work but have a 1995 rs legacy 4eat diff lined up but can't seem to find ratios on it i'm pretty sure all the auto twin turbo models we're 4.44 anyone able to confirm this for me as i can't seem to find any info on the TZ102YBABA 4eat to confirm ratios.

thanks guys awesome site.....

[Huffer]

This might help!
http://wac.addr.com/auto/obs/lsd/lsd.html

[BLTZDU]

thanks for that but my question may be a bit blurry, i need to know the ratio of a TZ102YBABA 4EAT gearbox out of a JDM 1995 twin turbo rs legacy as that is in the car that i will be getting the new diff from, but the owner of it could only get the gearbox number and i was hoping that they are 4.44 - 1 as the new gearbox i have installed is from a sti version3-4 impreza / 1997 GTB legacy and they require a 4.44 rear diff

[impreza_GC8]

That trans isn't on my listing because I only have a 5MT and 6MT directory but it is my experience that the majority of modern (90's+) Subaru auto transmissions have the 4.44FD.

[BLTZDU]

thanks again think i'll just grab the bull by the horns slap it in and see what happens, if all else fails i may have a sti 5mt up for grabs lol. best wishes to all for the new year

[Robbks]

should be stamped on the crownwheel anyway.
pull off the rear cover and check.

agreed with the majority of the Leggy auto's being 4.44.
but there were some (Foresters i believe) that got 4.11's

[Yamazaki]

The J-spec '95 RS A/T gear ratios are:
1st 2.785
2nd 1.545
3rd 1.000
4th 0.694
reverse 2.272
final 4.444

[Yamazaki]

should be stamped on the crownwheel anyway.
pull off the rear cover and check.

agreed with the majority of the Leggy auto's being 4.44.
but there were some (Foresters i believe) that got 4.11's
The '98-'00 Forester T/25 is what you're thinking of. But they aren't the only ones. As far as I can tell, all 4AT 2.5L vehicles (including Legacy) got the 4.111 final drive ratio, as well as some base model 4AT 2.0L (but there doesn't seem to be a pattern with those...)

[impreza_GC8]

Is that what you meant to post? If so its very confusing because you just stated that all the autos got 4.11 when clearly the majority got 4.44

[Yamazaki]

The '98-'00 Forester T/25 is what you're thinking of. But they aren't the only ones. As far as I can tell, all 4AT 2.5L vehicles (including Legacy) got the 4.111 final drive ratio, as well as some base model 4AT 2.0L (but there doesn't seem to be a pattern with those...)
Are we talking about the cars here (Japan)? The original post mentioned the '95 twin turbo RS, '97 GTB, and the Impreza STi ver 3/4, so I thought we were talking about the Japan specification vehicles. If that's the case, then what I said is correct. If this thread is about the American cars, then I honestly don't know what I'm talking about.

I was just trying to expound upon Robbks' comment, that's all. I didn't mean to confuse anybody.

[Reason]

BLTZDU seems to be talking about J-Spec cars so go on with your bad self.

[impreza_GC8]

I don't know as much about the JDM vehicles but I'd be surprised if autos got 4.11 vs 4.44. With only 4 gears you need to make up the difference somewhere and the higher final drive does that.
EDIT: To avoid confusion though, follow Yamazaki's advice as he has the information on JDM vehicles.

[BLTZDU]

Hey thanks Yamazaki thats what i was after and yes all these are JDM imports as im in New Zealand and we import plenty of vehicles from Japan

[BLTZDU]

Got the diff in and mounted up now just have to change the input flanges over from the 4.11 to the 4.44 as have slightly different bolt pattern also fitted the rs axles so all going well should be on the road again tommorow, definitely a learning curve but now its done hopefully its a good upgrade well anything has to be better than no second gear lol.

Cheers again for the help guys, big ups

[HeresMyMind]

i have 4.44 with lsd on my 5 speed. (JDM) and its great around town, i do 37mph in 5th around town. but the highway im screaming, doing like 3250rpms at 60mph. depending on your driving 3.9 or 4.44 are the extremes highway vs. town. 4.11 is best all around gearing

-B

[mike-tracy]

That trans isn't on my listing because I only have a 5MT and 6MT directory but it is my experience that the majority of modern (90's+) Subaru auto transmissions have the 4.44FD.

For the American readers, the majority of the 90s Legacys with 4EAT got 4.11
The exception to that were the Legacy Outbacks, and other Legacys with the 2.5: 4.44FD. And the Legacy that a friend of yours knew somebody owned. :wink:

[Subieee]

[quote="impreza_GC8":14f8qacy]That trans isn't on my listing because I only have a 5MT and 6MT directory but it is my experience that the majority of modern (90's+) Subaru auto transmissions have the 4.44FD.

For the American readers, the majority of the 90s Legacys with 4EAT got 4.11
The exception to that were the Legacy Outbacks, and other Legacys with the 2.5: 4.44FD. And the Legacy that a friend of yours knew somebody owned. :wink:[/quote:14f8qacy]

I have a '97 Legacy Outback Wagon, A/T...I have a 4.44?

[chuckthefuk]

yes..

[jey]

I looked at the USDM FSMs for the 2nd gen legacies and it also indicates 2.5L 4EATs get 4.444 while 2.2L have 4.111. That makes it clearer cause in 95 the "Outback" was just a 2.2L Legacy L with some options

[Wiscon_Mark]

I always figured it had to do with the tire circumference. Bigger tires = more rotational mass, so they back off on the gear ratios to make it peppier. But that's generalizing.

[jey]

They changed the 5th gear ratio in the 5MTs but on the 4EAT they just tweaked the stall torque ratio and speeds to accommodate the bigger tires, at least in the 2nd generation Legacies.