ECU tune Transmission control unit?

[steveherman]

Originally Posted by Nomad

I'm selling 2 of these for 75$ each!

For a 4.44?

[Nomad]

one stock and one for a 3.90.

[longassname]

I'll buy them.

[longassname]

Performance FWD TCUs are available now. They are $350 and no core is required.

They have the same changes the performance all wheel drive TCUs have. As I have been doing for quite a while now I am publishing the changes so the information isn't lost should I get hit by a bus.

705503 BASECODE =94 US FWD SVX

MADE 12-26-2012


C025=E7:THRESHOLD TO TURN ON ATF TEMP WARNING LIGHT DECREASED TO 212F FROM F4
C026=DF:THRESHOLD TO TURN OFF ATF TEMP WARNING LIGHT DECREASED TO 203F FROM EE
C027=DF:THRESHOLD TO TURN OFF OVERHEAT MODE DECREASED TO 203F FROM E6
CO28=E7:THESHOLD TO TURN ON OVERHEAT MODE DECREASED TO 212F FROM E9
__________________________________________________ _________________________________________________

CEA2: NORMAL MODE IN D 1-2 (GEAR 1 UPSHIFT) SHIFT MAP FROM TCUMAPS.XLS
0F 00 80
1E 33 C0
3C 19 F0
53 00 F0
FF 00 FF

CEB4: NORMAL MODE IN D 2-3 (GEAR 2 UPSHIFT) SHIFT MAP FROM TCUMAPS.XLS
1E 00 80
3C 19 BC
5A 1B F0
95 00 F0
FF 00 FF

CEC3: NORMAL MODE IN D 2-1 (GEAR 2 DOWNSHIFT) SHIFT MAP FROM TCUMAPS.XLS (COPY OF POWER MODE MAP)
0F 00 80
0F 00 C0
2D 19 F0
FF 00 FF

CFAD: Power MODE IN D 1-2 (GEAR 1 UPSHIFT) SHIFT MAP FROM TCUMAPS.XLS
14 00 80
2B 16 B0
42 2C F0
53 00 F0
FF 00 FF

CFBF: Power MODE IN D 2-3 (GEAR 2 UPSHIFT) SHIFT MAP FROM TCUMAPS.XLS
28 00 80
51 0C AC
7E 18 F0
95 00 F0
FF 00 FF
__________________________________________________ __________________________________________________ ___

CA81-CA98: 3RD GEAR SOLENOID A MAP FROM SOLAMAPS.XLS
0F 00 1F40
2f 00 4a38
3f 00 4a38
7f 00 4a38
FF 00 4a38
ff 00 4a38


CA99-CAB0: 4TH GEAR SOLENOID A MAP FROM SOLAMAPS.XLS
0F 00 1F40
2f 00 4a38
3f 00 4a38
7f 00 4a38
FF 00 4a38
ff 00 4a38

[longassname]

Needforspeed,

Do you have any JDM TCUs to sell? I'd like to know the cash price if you do and how many. Also, I understand you are tinkering with transmissions, I have some hard to come by upgrade parts I would possibly trade if you wanted.

Originally Posted by NeedForSpeed

Jim,

The transmission is a 4EAT, four speed electronic automatic transmission. The gear ratios are 2.785, 1.545, 1.0, 0.694. Fourth gear, less than 1.0, is an "overdrive" gear. It could be said that the SVX has a three speed with an overdrive 4th gear.

You also have a locking 'TC' torque converter. The Subaru 4EAT is programmed to lock the torque converter in fourth gear. When the torque converter locks, the rpm will drop about 200 rpm. You can feel the lock, and you can see the rpm drop on the tach. It feels like a shift