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Everything posted by Legacy777
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In 96 they changed the tranny, so the electronics are different.....connector is different. You can use a newer tranny, you'd just have to match up the wiring and switch connectors. The 92-94 AWD autos had a 3.90 final drive ratio, I don't know what the 95 had. The 90-91 AWD autos had a 4.111 final drive ratio. So if you use one of those, you need to switch out the rear end so that it has the same final drive ratio. So that leaves you pretty much with the 92-94 AWD AT legacy trannies as plug & play, but others could be used with more effort.
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Don't clean the TB.....there is a film on there from the factory that helps keep carbon deposits from forming and causing a sticky throttle. As for the IAC valve. I did notice on my car that if I used the stock thin metal gasket over the newer composite gasket I would not get a whistle. However if switched, I would get a slight whistle.
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You're not going to be able to disconnect the TCU connector from the wiring bundle easily. I'm sure there are some wires that are tied together. You could always cut the connector off, but really it's not that big a deal to just leave it. The 90-94 legacies use a mechanically driven gear in the tranny/diff that drives the VSS in the combination meter (gauge cluster). So it shouldn't be a big deal when converting it to an earlier car, since they probably had mechanical speedos as well.
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I checked and the connector is the same. Pin 2 of the automatic (AT) connector of the IAC valve has 12v going to it from the ignition relay. Pins 1 & 3 go to the same spots on the ECU. The thing with the sensors.....You'll want to grab the appropriate sensors for whatever ECU you grab. JECS or Hitachi. That is going to determine what sensors you need. Injectors & MAF sensor are the biggies that need to match with the ECU, the other sensors can sort of be fudged, depending on the wiring of the AT/MT identifier pin on the ECU. Let me know if you have any more questions or if I didn't answer your current ones.
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There are some differences. The 90-91 legacies had different sensors for the AT & MT cars. The MAF, IAC, fuel injectors, coil pack, ignitor, and possibly a few other things were different. However, out of that bunch, I think the IAC valve is the only one that could have a different connector....I'm not positive. In 92-94, the AT & MT's had all the same sensors as the 90-91 AT's. However the engine wiring harness went from a 3 plug setup in 90-91 to a 2 plug setup in the 92-94 models. So depending on what year the donor is, and whether it is AT or MT will determine whether you'll need to grab another engine harness to match it.
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All car manufacturers are raising prices.....it's ridiculous IMO how much cars have gotten. I think it's BS. In subaru's case, they are trying to compete with upscale markets. Their problem is their image. They have been known for good AWD cars, not too frilly, for a reasonable price. That is a rather big image to get past....with current customers, and future customers. It's the reason toyota created Lexus, and Nissan created infiniti. Personally, I don't think subaru will sell the volume of premium vehicles unless they follow suit with a premium brand.
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You can do it in a weekend pretty easily. Depending on how much room you have, etc. You might be able to do it in a day, but I'd give yourself two days for those unexpected issues. You have to remove pretty much the entire rear suspension/drivetrain. Rear crossmember, trailing links, you could probably leave the struts & hubs on if you support them with something. Once that stuff is out of the way, you'll need to support the tank, unbolt the straps holding it, slowly let it down, and undo the electrical and hose fittings on the side of the tank, and the filler & vent lines. Check out some of the pics from my swap write up. That should give you some more ideas.
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90 Legacy transmission swap (Wagon/ Sedan) ?
Legacy777 replied to sregor13's topic in Subaru Retrofitting
yup, should work just fine.