I am doing the tranny swap from auto to 5 speed. I got this list form dsmtalk.com non turbo section:

1. 2G NT flywheel.
2. Manual pedal assembly
3. Clutch master cylinder and slave cylinder.
4. Manual tranny for a 420A engine.
5. Shifter and shitfer cables
6. MT mount
7 Clutch components (disk, preassure plate and throw out bearing).

My question is: will I need a MT ECU?? Does the ECU decide when an auto shifts?? If so, when I do the swap and I don't use a MT ECU will it cause problems since (I think) the MT's redline is higher than the auto's (which is 6.5K)?? And I will need a new tach gauge just for convinience right? thanks.

PS - Is my list complete??

get the manual ecu for the same year 5 speed eclipse as yours, because it'll raise the revlimiter etc

didn't you want to do a 5 speed swap as well?

but does the ecu matter? the auto has its on ecu which controls shifts, i thought the tcm shifted at 6500, not the ecm.

i know the engine will start and run just fine w/ the tcm disconnected, but i have no idea if the limiter is different - anyone know for sure?

yes I wanted to, and still do. I'm knowledgable on this cause I studied it a lot. The auto ecu has a rev limit that's lower then the manual transmissions, so you'll be at a disadvantage to a stock 5 speed

The auto ECU rev limits at 6750. The MT ECU revlimits at 7200. An AT ECU will worrk in a car with an MT, but will throw codes for the TCU and vehicle speed sensor.

can i use any 2g ecu for my 98 eclipse or does it have to be same year for the conversion?

I recommend getting the same year ecu as your car, I've heard that 97-98 ecu's will work for each other but may shoot codes

95 ans 99 are the oddball ECU's. 96, 97, and 98 *should* all be interchangeable.. but i've never tried it.