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-   -   2nd Gen Transmission FAQ - Maintenance - Differentials - 5MT - 6MT - 4EAT (http://legacygt.com/forums/showthread.php?t=170464)

broknindarkagain 09-19-2011 07:34 PM

2nd Gen Transmission FAQ - Maintenance - Differentials - 5MT - 6MT - 4EAT
 
Transmission FAQ

Here in this thread you will find important information regarding second generation Legacy transmissions and different performance options that are available.


Disclaimer:
The information in the following posts is believed to be acurate and correct. The author(s) can not be held responsible for any advise in these guides. Please exercise common sense while working on your vehicle and never hesitate to ask questions if you're unsure of anything.

broknindarkagain 09-19-2011 07:35 PM

Maintenance

4EAT
Fluid Type : Dexron III
Total Capacity : 10 Quarts
Refill Capacity : 2.6 Quarts
Service Interval : 30,000 miles
Serviceable Filter : YES

5MT
Fluid Type: Subaru Special S 75W-90 GL5
Capacity : 3.7 Quarts
Serviceable Filter : NO

6MT
Fluid Type: Subaru Special S 75W-90 GL5
Capacity : 4.3 Quarts
Serviceable Filter : NO

Front Differential (4EAT ONLY)
Fluid Type: Subaru Special S 75W-90 GL5
Fluid Capacity : 1.3 Quarts

Rear Differential
Fluid Type : Subaru Special S 75W-90 GL5
Capacity : 0.85 Quarts

Clutch
Fluid Type : DOT3 or DOT4 fluid

broknindarkagain 09-19-2011 07:35 PM

5MT

There have been several variations of the 5MT. Between 1990 and 1995 model years, only the turbo vehicles (USDM Legacy Turbo) had a hydraulic clutch. 1995 and later, every 5MT had a hydraulic clutch that used either DOT3 or DOT4 brake fluid. In 1998, Subaru changed from a push type clutch to a pull type. Minor bell housing changes were needed to make this happen, but transmissions are still interchangeable with each other.

The 5MT uses a 50/50 torque split.


5MT
Used in pretty much all Subarus from 1995 - 2002 including the WRX)
1st : 3.785
2nd : 1.945
3rd : 1.500
4th : 0.994
5th : 0.780 - 0.735 WRX
Final Drive : 4.11 - 3.90 WRX
1996 Exception
1st : 3.545
2nd : 2.111
3rd : 1.448
4th : 1.088
5th : 0.825 (FWD) - 0.780 (AWD) - 0.871 (Outback AWD)
Final Drive : 3.454 (FWD) - 3.900 (AWD) - 4.111 (Outback AWD)
5MT Revised
This transmission is used in all non-turbo Subarus 2003 - present
1st : 3.454
2nd : 2.062
3rd : 1.448
4th : 1.088
5th : 0.871
Rev : 3.545
5MT Turbo
This transmission is used in all 5MT Subaru turbo cars 2003 - present
1st : 3.166
2nd : 1.882
3rd : 1.296
4th : 0.972
5th : 0.738
Rev : 3.545

broknindarkagain 09-19-2011 07:36 PM

4EAT
under construction

The 4EAT is the only automatic transmission available in the BD, BG, and BK Legacys. "EAT" stands for "Electronic Automatic Transmission".

The 4EAT was released in 1988 for use in the Subaru XT6 and Leone Touring Wagon. In 1989 when the EJ engine was released, the bellhousing was changed to accept the newer engine, but for the most part the transmission stayed the same.

The 4EAT has been used in the following Subaru models :
88 - 91 Subaru XT
90 - 04 Subaru Legacy
92 - 97 Subaru SVX
95 - present All Subarus
The 4EAT design has been shared with a few other manufactures as well. Jatco designed the 4EAT, and has allowed Nissan, Ford, and Kia to use the same or very simular designs.


Gear Ratios
1st - 2.785
2nd - 1.545
3rd - 1.000
4th - 0.694
reverse - 2.272

Final drive ratios vary depending on year and model. The majority of final drive ratios are 4.11

Common 4EAT Problems & Solutions
Torque Bind
This is probably the most common 4EAT problem. This is the transmission getting stuck in a 50/50 power split now allowing for slippage in the center diff. Its usually caused by a faulty Duty C solenoid, however can sometimes be cured with a few "drain and fills"

broknindarkagain 09-19-2011 07:36 PM

6MT Swaps

under construction

broknindarkagain 09-19-2011 07:36 PM

Diffs & Gear Ratios Explained

under construction

broknindarkagain 09-19-2011 07:37 PM

Shifters, Bushings, and Linkage

Under Construction

broknindarkagain 09-19-2011 07:37 PM

Driveshafts

Under Construction

broknindarkagain 09-19-2011 07:38 PM

Quote:

Originally Posted by Subyduby-doo (Post 3555580)
maintenance, not trying to be a smart ass

ill fix it - can you delete your post please so all the info can be together and there isn't some random post in the middle of it all lol thanks

SpecBamf41 09-19-2011 07:59 PM

lmao. brokn was on it in a second. thanks man!! ill start searching

Subyduby-doo 09-19-2011 08:03 PM

Where's the 5eat section?

Jab83 09-19-2011 08:05 PM

Hey what about the 5 and 6eat??? some people might like AT's so. I think it be cool to have some info on em. :D

broknindarkagain 09-19-2011 08:05 PM

Thanks for removing the post!

5EAT wasn't standard equipment in the second gen Legacy so I'm not going to give it its own section. I'll touch base on the 5EAT and 6MT in the "swap" section.

SpecBamf41 09-19-2011 08:54 PM


SpecBamf41 09-19-2011 08:56 PM

Quote:

Originally Posted by Jab83 (Post 3555627)
Hey what about the 5 and 6eat??? some people might like AT's so. I think it be cool to have some info on em. :D

they dont make a 6 eat? or do they?


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