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So, I'm just gonna post what I've got going on and what I've found and hopefully people can chime in who know more about this than me. Even if you don't know about all parts of my question please post what parts you do know. I've read alot of posts on this forum and other Subaru forums but this is by far the most involved repair I have attempted. Short version: Duty C solenoid. Most info posted in this thread should apply to 99-04 models as this repair is similar on those years (99 models with TZ1A2 trans) Last fall my AT Temp light started flashing intermittently, with torque bind when it was flashing. After a couple weeks it pretty much stayed on. I found how to get the TCU codes and got codes 93, 27 and 79. According to this post: http://www.ultimatesubaru.org/forum/topic/113278-how-to-read-transmission-codes/?do=findComment&comment=1103000 27 ATF temperature sensor. Detects open or shorted input signal circuit. 79 Transfer duty solenoid. Detects open or shorted output signal circuit. 93 Rear vehicle speed sensor. Detects open or shorted input signal circuit. I thought that it had to be a loose TCU cable or something because how could all 3 go bad? I checked the codes a few times over a month or so and got the same codes, clearing them in between at least a couple of those. A while later I was able to try unplugging and reconnecting the main cable at the TCU, Transmission, and the weird little extension above the transmission. Light still on, still torque bind. I was originally writing this post to ask for help verifying the Duty C solenoid, but just last week as I was finally going into detail researching the problem and the repair I decided to check the codes again, and with a few checks over the past week or so it's showing only code 79 which seems to verify that as the specific problem. Now that you've spent a couple minutes reading my description of the problem, here are my actual questions: 1. I have a vibration sometimes, starting at about 60 MPH. Sometimes it is in the steering wheel, sometimes more the whole car, and it varies greatly in strength on different days at the same speed. Sometimes pressing on the brakes hard will make the vibration stop for a while, sometimes not. Does this make any sense to perhaps be caused by the transfer solenoid? 2. Until I have time and money to actually replace the transfer solenoid, can I safely disconnect the front differential solenoid and will that reduce the torque bind when parking? 3. Has anyone else done this on a 99 phase 2 transmission, TZ1A2 who can verify the part numbers I found? 31942AA103 - transfer solenoid 31337AA191 - case gasket 31952AA060 - Transfer valve gasket plate 31523AA410 - transfer clutch pack 31954AA071 - transfer valve gasket gasket 4. I swear I had some other question which I will probably remember on the way to work tomorrow lol Thanks for taking the time to read my long post. I attached the Vin Plate or whatever it's called as well
