Subaru made several four speed transmissions from 1970–1989, they are listed below.
T71
Gear Ratios: 1st 3.307 2nd 1.944 3rd 1.344 4th 0.942 Rev 4.100
Usage: All 1970-1982 FWD
T71A 1st Revision
Gear Ratios: 1st 3.636 2nd 1.950 3rd 1.193 4th 0.769 Rev 3.583
Usage: All 1983-1989 Subaru Leone FWD 1600cc
T71W 4WD
Gear Ratios: 1st 4.090 2nd 2.157 3rd 1.379 4th .971 Rev 4.100, Low Range 1.462
Usage: 1975-1980 Subaru Leone and 1978-1981 Subaru BRAT
T71W 4WD 1st Revision
Gear Ratios: 1st 3.666 2nd 2.157 3rd 1.266 4th .885 Rev 4.100, Low Range 1.462
Usage: 1981 Subaru Leone 1600cc
T81W 4WD
Gear Ratios: 1st 3.636 2nd 1.950 3rd 1.266 4th .885 Rev 3.583, Low Range 1.462
Usage: 1981 Subaru Leone 1800cc
T81W 4WD 1st Revision
Gear Ratios: 1st 3.636 2nd 1.950 3rd 1.193 4th .769 Rev 3.583, Low Range 1.462
Usage: 1982-1989 Subaru Leone 1800cc and 1982-1993 Subaru BRAT (EA-81 engine only)
Five Speed
T71G
Gear Ratios: 1st 3.666 2nd 2.157 3rd 1.266 4th .885 5th .725, Rev 4.100
Usage: 1975-1982 Subaru Leone
T71G
Gear Ratios: 1st 3.636 2nd 2.157 3rd 1.266 4th .885 5th .725, Rev 3.583
Usage: 1983-1989 Subaru Leone 1600cc
T81G
Gear Ratios: 1st 3.371 2nd 1.950 3rd 1.266 4th .885 5th .725, Rev 3.583
Usage: 1983-1989 Subaru Leone 1800cc (EA-81 Engine ONLY)!
5MT EA
1st 3.636 2nd 1.950 3rd 1.344 4th .971 5th .783, Rev 3.583
Usage: 1985-1994 Subaru Leone
5MT
This was the only five-speed 4WD transmission made for the Subaru Leone
Gear Ratios: 1st 3.545 2nd 1.947 3rd 1.366 4th .972 5th .780, Rev 3.416 Low Range 1.59
Usage: 1985-1994 Subaru Leone and 1985-1989 Subaru XT 1800cc
5MT Full-Time
This transmission was Subaru's first Full-Time 4WD transmission, only used in the Alcyone/XT6 and 3 door RX.
Gear Ratios: 1st 3.545 2nd 2.111 3rd 1.448 4th 1.088 5th .871, Rev 3.416 Low Range 1.196
Usage: 1988-1991 Subaru XT-6
5MT Justy
The Justy used a transaxle, rather than a conventional Subaru transmission. This transmission was dropped in 1994 when you could only get a 4WD unit.
Gear Ratios: 1st 3.071 2nd 1.695 3rd 1.137 4th .823 5th .675, Rev 3.461 Final 4.437
Usage: 1984-1993 Subaru Justy
5MT Justy 4WD
The Justy's transaxle was modified to fit push-button 4WD in 1988. The gear ratios were also altered slightly.
Gear Ratios: 1st 3.071 2nd 1.695 3rd 1.137 4th .771 5th .631, Rev 3.461 Final 5.200
Usage: 1988-1994 Subaru Justy
5MT
It is notable to mention that only Turbo vehicles received a hydraulic clutch until 1995. Also, in 1998 Subaru changed from a push-style clutch to a pull-style requiring minor bellhousing and fork changes.
Gear Ratios: 1st 3.785 2nd 1.945 3rd 1.500 4th 0.994 5th 0.780/(0.735 WRX) - Final 4.11 (3.90 WRX)
Usage: All 1990-2003 with EJ-Engine
MY 96 Transmission specs (and possibly other years)
Gear Ratios: 1st 3.545 2nd 2.111 3rd 1.448 4th 1.088 5th 0.825 (FWD) / 0.780 (AWD) / 0.871 (Outback AWD) --- Final 3.454 (FWD) / 3.900 (AWD) / 4.111 (Outback AWD)
Source: 1996 Subaru Legacy Service Manual
Also matches 1999 Legacy 30th Anniversary
5MT Revised
Gear Ratios: 1st 3.454 2nd 2.062 3rd 1.448 4th 1.088 5th 0.871 Rev 3.545
Usage: All 2003–2011 Subaru Non-Turbo
5MT Revised 2012+
Gear Ratios: 1st 3.454 2nd 1.888 3rd 1.296 4th 0.972 5th 0.738 Rev ? Final 4.111
Usage: All 2012–Present Subaru Non-Turbo
5MT Turbo
Gear Ratios: 1st 3.166 2nd 1.882 3rd 1.296 4th 0.972 5th 0.738 Rev 3.545
Usage: All 2003–Present Subaru Turbo
Six Speed
Impreza WRX STi and Legacy spec. B
There are several six speed manual transmissions currently available for USDM Subarus, found in the STi, Legacy Spec B, and 2015 WRX. The STi's 6MT has undergone various changes throughout the years, but have always had a limited slip front differential with Driver Controlled Center Differential (DCCD). In 2006, The STi's 6MT underwent some changes that included making the center differential a limited slip unit and a slight lengthening of some gears. The Spec. B's 6MT has different gear ratios (specifically 6th gear being longer) than the STi's unit, does not have DCCD, and neither the front nor center differentials are limited slip units. The Spec B's 6MT is still highly prized; however, because of its longer ratios than those found in the STi, while still retaining much of the STi unit's robustness.
Gear Ratios : 1st 3.636 2nd 2.375 3rd 1.761 4th 1.346 5th 0.971 6th 0.756 Rev 3.545 (This only applies to either the 04-05 STi or the 06+ STi, not both, and not the Spec B.).
Usage: 2004+ Subaru WRX STi and 2007+ Subaru Legacy spec. B
Early 2004 WRX STi models came with axle stubs inserted in the transmission with female front axles. Late 2004 WRX STi models came without the stubs and instead had male front axles.
The 2004 and 2005 model WRX STi 6MT was a final drive of 3.90. In 2006 and 2007 the 6MT came with a final drive of 3.545 which made the 2006 and 2007 much sought after for the non-STi WRX owners as a transmission swap. This is due to the R160 rear differential 3.545 final drive of most of the non-STi WRXs.
| Model | 1st | 2nd | 3rd | 4th | 5th | 6th | Reverse | Final Drive | DCCD | Front Diff | Center Diff |
|---|---|---|---|---|---|---|---|---|---|---|---|
| US Impreza WRX STi MY04 TY856WH3MA | 3.636 | 2.375 | 1.761 | 1.346 | 0.971 | 0.756 | 3.545 | 3.900 | 35/65 | A.P. Suretrac | automatic DCCD system |
| US Impreza WRX STi MY04 late TY856WH4MA | 3.636 | 2.375 | 1.761 | 1.346 | 0.971 | 0.756 | 3.545 | 3.900 | 35/65 | A.P. Suretrac | automatic DCCD system |
| US Impreza WRX STi MY05 TY856WW6MA | 3.636 | 2.375 | 1.761 | 1.346 | 0.971 | 0.756 | 3.545 | 3.900 | 35/65 | Helical LSD | automatic DCCD system |
2010 Legacy/Outback
The new 2010 Legacy and Outback models offer a six-speed manual as one of the two transmission options in the base 2.5i, and is the only option for the Legacy GT model. This transmission is an evolution of the 5MT split-case design, and does not share any parts of construction with the STI's 6MT transmission. The transmission uses a cable shifter, unlike all previous designs that use a direct mechanical linkage.
2015 WRX
The 2015 WRX has a new 6-speed cable-shifted manual transmission behind the new FA20DIT boxer engine. This transmission uses a viscous limited slip center differential with a 50/50 torque split similar to the 5MT found in previous WRX's. Reverse is located to the right of 6th gear, and is accessed by lifting a lockout ring below the shift knob, similar to the STi 6MT.
Gear Ratios are: 1st: 3.454 2nd: 1.947 3rd: 1.296 4th: 0.972 5th: 0.780 6th: 0.666 Reverse: 3.636 Final Drive: 4.11
