The 96 ECU will work on any 95 - 96 turbo cars. MT or AT, that does not matter.

The 97 will work with all 97 - 99 turbo cars. MT or AT does not matter.

In 97 Mitsubishi switched the CAS signal, that is why you would have problems interchanging them. You could use a 97 ECU in a early 2g, but you would also have to use the 97 - 99 CAS or vice versa.

Stole this off a link from this site (dsmtuners)

1990

Inagural model year of the DSM.
Pop-up headlights.
Some high-end models had wheel covers.
All ECUs had EPROMs.
Front brakes change during the model year.
1.8L models have the 4G37 engine, all others have the 4G63 engine.

1991

ECU changes mean that 1991+ ECUs don't operate the 1990 tachometer correctly.
Most ECUs had EPROMs.
First model year with ABS available. ABS not available with limited-slip differential (LSD).
All high-end models had alloy or mesh wheels.
First year of the Galant VR-4 - 2000 sold in the American market.

1992

Non-popup headlights introduced on all models.
The first AWD Lasers were introduced.
Few (or no) ECUs have EPROMs.
ABS now available with LSD.
The engine changes from the 6-bolt version to the 7-bolt version in April.
Second and final year of the Galant VR-4 - 1000 sold in the American market.
The last year of the Dodge 2000GTX.

1993

"Big brake" 2-piston front calipers become standard on turbo models.
7-bolt engines are now standard.
No ECUs have EPROMs.
Diamond-Star Motors ceases to exist.

1994

All cars built to California emissions standards - there are no "Federal" cars.
The last year of the 1G car and the 1.8L NT models.
The last year of the Plymouth Laser.

1995

The inagural year of the 2G DSM.
Significant changes to the engine, body, and electronics.
New transmissions.
All ECUs have EPROMs.
Non-turbo models are based on the Chrysler 420A engine instead of the Mitsubishi 4G63 engine.
OBD-II becomes standard on DSMs, along with two oxygen sensors.
Mitsubishi begins using some substandard crankshafts, leading to crank walk on some 2G cars.

1996

The first year of the convertible Spyder.
The Mitsubishi 4G64 engine is offered, in the Spyder models only.
ECUs stop having EPROMs.

1997

Additional body changes from the 1995/1996 models.
Minor changes to the ECU code.

1998

Minor changes to the ECU code.
After many years, Mitsubishi finally issues a recall on the AWD DSM transfer case.

1999

The last year of the 2G car, and of the 4G63/AWD DSM platform.
The last year of the Eagle Talon. Chrysler drops the Eagle marque.

They didnt make a talon in 99 did they? Ive only seen 98's where is this 99 they speak of.

, wow, a moderator needs to fix that on the site.......

I just copied and pasted.....WTF

How about the other way around?

95 Eprom ECU to a 98 GSX?