allantico

I meant to say "Not driven for a year..." Some of you might remember my case. I put the engine and auto tranny from a 93 legacy into a 90 legacy. I got TB 8 out of 10 times I started the car, that includes TCU code 24 and all. The mechanic replaced the AT fluid twice, the clutch pack, and the duty c, but the problem persisted, so he put my old clutch pack back in and duty c and gave up. The only thing that remained after he asked me to pick up the car was the fresh AT fluid. Surprisingly, now the TB is almost gone. I start the car, power light comes on, but flashes only sometimes. When it does, I turn the car off and back on and it's gone. Before, it used to flash at me almost all the time. Now, one thing I forgot to mention in my previous posts, is that the 1993 engine and tranny were sitting for a WHOLE YEAR without being driven or even started at all. Could this have caused the TB at the beginning? Does it make sense that is almost gone now that I have been driving with clean AT fluid? I post this one because I did a lot of research on TB, but couldn't find one post putting 2 & 2 together! And sorry for not mentioning that earlier... I appreciate any feedback and will keep you all posted!

Thanks. Do you know if the 1992 is the same as the 1993?

Does anybody have 1990 & 1993 Legacy Wiring Diagrams scanned? I need to compare a few things. Thanks.

I assume you didn't get any trouble codes from the TCU? It sounds like your TB was caused by a mechanical problem, right?

Thanks. I'm pretty sure he kept the harness, TCU and ECU from the 90. If I get a new TCU (1993), do I need to also get a 1993 wiring harness? The tranny shifts perfectly and smoothly. Besides the TB, there is not other problem with it. If the problem was the computers or the wiring, why would it just affect the operation of the duty c and not the shifting and other things? Also, I read the info on the MT/AT identifier pin, but I'm not sure how this pin could affect me since both cars, the 1993 and the 1990 have AT. Thanks again.

Guys, I am going to try to answer all your questions here: 1. The car did not have binding when I got it. I am paranoid about cars and at the smallest alert, sign or noise I have it checked. There was no flashing POWER light or binding at all. 2. The mechanic replaced the parts, but since it didn't fix the problem, he put the old ones back in and didn't charge me the $700. He showed me the new parts he ordered from Subaru and we compared them to the old ones. There was no significant difference with respect to wear. That's why he put them back in. 3. The car currently has 1993 engine and tranny running on 90 wiring. 4. 8 out of 10 times I start the car, there is a flashing POWER light. It flashes 16 times. When I check the code using self-diagnostic mode, I get trouble code 24: duty c. The rest of the times, it starts and drives like a dream for a while and then it binds again. 5. He did replace the housing at one time, but it didn't help. Since when I got the car there was no binding, and now it does it most of the time but NOT all the time, I am pretty certain it is an ELECTRICAL ISSUE. Today, I turned the ignition on and put the FWD fuse in. I was able to hear something moving when I put it in and took it out. Is this supposed to happen? Can anybody tell me where to find the connectors that go directly to the duty c? Thank you all or the info.

Thank you. The mechanic ordered a new set of clutches for the 93 tranny. They were new from Subaru. He put them in, including the new duty c, but the problem was still there. Now, he might have forgotten and ordered clutches for the 90 since the body is from a 90. Let me clarify that the engine and tranny were from my 93 legacy and I put them into a 90 legacy. He did keep the computers and wiring that came with the 90 and hooked them up to the 93 drive train. This might be the root of the problem. I will take it to another mechanic tomorrow. Perhaps a fresh pair of eyes will spot the issue easily. If he does, I'll let you all know. So in this case, since the car is in constant 50/50, does it mean that the duty c is not being energized? Thanks again.

Thanks for the info. I knew there had to be some kind of difference! I'm not sure, but I think he kept the harness from the 90, the TCU, and the ECU. The engine and tranny are from the 93. I will ask hi about the harness tomorrow. In any case, I picked it up today and the binding was still there. However, I stopped by Les Schwab to check the tire pressure and when I started the car again, there was no POWER llight flashing and there was no binding as I left the parking lot. The car drove great back home. Nevertheless, when I got back home, I drove over some gravel to test it and there it was. It was binding again, and it lurched forwards as I put it in park and stopped the engine. Why is it intermittent like that??? Any other ideas or info you can give me I would really appreciate. You guys are great! Thanks

Sorry...He replaced the transfer clutches and the duty c. The problem does not go away with the fuse. The FWD light comes on but the binding still happens. The front and rear were transfered from the 93 to this one. The TB was not there right after I got the car back from the mechanic the first time, and when it started happening, it didn't do it all the time. I assume if the binding was due to the diffs, I would have noticed it before and it would have been permanent from the start. Am I right? Do you know if the wiring in these two models is exactly the same? The mechanic told me it is, but I am not sure. Thanks for the help.

I had a 93 legacy that I totaled. The engine and tranny were fine so I bought a 90 wagon and had mechanic made the swap. Both automatics. He replaced the diffs and everything that didn't match, but kept the ECU, TCU and wiring from the 90. At first, it was all fine, but then I started noticing torquebind. I took it back to the mechanic and he replaced the center diff and duty C sol. The problem persisted so he put the old parts in. Tires are fine, and even with the FWD fuse the problem is still there. I think it's either the output from the TCU or the wire to the Duty c. Am I right? Are we missing something in this kind of transplant? Also, in the 90, I had to install the emergency break lever. I took it from the 93. I realized that the wiring is different in both models. Where the 90 uses two wires, one for power and another one for ground, the 93 uses the body as ground. Could this be related to the issue? Also, how exaclty does the duty c work? is it open when powered or closed? I know there is plenty of info on TB, but nothing on transplants. PLEASE HELP!