Yeah, it's a good tranny. I just like to plan ahead since I want to keep the SS forever.
A few strange issues have occurred with it though. There is a rattling type noise coming from the front of the bellhousing, where the torque converter is located. It goes away at higher rpms though. It's not a loose heat shield either. It isn't causing a problem but I don't like it and have no idea what it is. The other problem is the Duty-C solenoid code was flashing. I dropped the tailhousing and replaced the duty-c with a superseded part from Subaru. The torque bind and flashing went away for about two hours and came back. That pissed me off a little since replacing the duty-c is kind of a big job. I did all the FSM diagnostic procedures which indicated a faulty TCU. I replaced the TCU with another turbo TCU of the same year from a working vehicle and got the same flashing and torque bind. I checked the resistors and transistors of the TCU and they were all within spec. So on a whim I swapped in an NA TCU and the flashing is gone as well as the torque bind. It has a slightly different shift pattern now, but I have the POWER mode wired up and with that it shifts pretty good, and at WOT I can run it up to the redline.
I have done multiple drain and fills and the fluid is nice and clean. To replace the filter I would have to drop the transmission pan, and the generally don't clog up so I'm not going to mess with that. There isn't an exernal trans filter on my 4EAT like some later models.
I am also trying to source a JDM VTD TCU for an EJ20G Auto trans since I can find low mileage JDM transmissions pretty easily, but the TCU is proving impossible to find.
I am also installing a RobTune TCU soon so there will be a bump in hp and like I said, just in case it breaks down the line I want to know what options are available. I would rather just swap in a JDM 5MT but my wife drives the car and loves having an automatic even though she can drive a stick just fine.