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Lost AWD in a 95 legacy outback


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I just purchased my second subaru and unknown to me the AWD is not working, (the first snowfall of the season and I can't go anywhere). It is about to hit 100k, automatic but only the front tires spin when I step on it during slick conditions. I have noticed that on a decline, turning sharply, I will feel the front bind a hair. I previously had a 90' legacy and that would happen once in a while. I have looked for a fuse to control the clutch, the car isn't equiped with traction control, I am just looking for good starting place to diagnose this problem before I let the mechanics take me to the cleaners.

 

Thank

Fondy210

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I think the fuse holder that colorado is talking about it the one that you use to put the tranny in FWD only, usually if there is a fuze in there, it is because there is a problem with the tranny in the first place. I have a friend with the same problem, after checking evrything we could think of, we finally resolved that the tranny needs to be replaced. I was suggest getting one from a year near yours. Since your's is a 95, the first year of the gen 2 (some say gen 3, they think there was a change at 92), I'd stick with a 95, 96 or 97 tranny.

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I would start by doing some searches on this site for users with similar problems. One I know of was posted by patcal titled "starting to hate this car (tranny) Help!!". I have the same problem with my '90 legacy w/auto and 180k. Here's what I've done:

 

Tore apart the transmission – nothing wrong.

 

Replaced the TCU (transmission control unit) – nothing wrong.

 

Inserted and removed the FWD fuse – no difference.

 

Checked the voltage going directly to the Duty C solenoid which controls the AWD – problem found!

 

I’ve fixed it by putting a switch in the wire going to the Duty C solenoid. For some reason my car ALWAYS has 12v going to the solenoid, which keeps it in two wheel drive. When I break the connection it puts it in full time four wheel drive, when it’s connected it goes back to front wheel drive. So far it’s worked great – I love it in the snow because it stays locked up all the time. The only thing I have to be careful of is not to drive with it locked up on the pavement.

 

I think the post by Patcal has all the references to which wire to look for and what he did to solve his problem. You might just have a bad transmission control unit. Good luck. Dave

 

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I was attempting some off-camber stuff in my front yard the other day and I had forgotten for a second that my car was AWD..untill I went up a hill kinda funny and felt the AWD kick in and I was up...up...and away. Then I went through some sugar sand in 1st gear (auto) and had people nearby looking at me like I was on crack.

 

I have a switch on the dash for my Duty C so I shut the AWD off when I take long highway trips.

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Sounds like the transfer clutches in your Tranny have gone bad :(

 

Unfortunately, with high of mileage, this is quite a common issue.....

 

You may want to get it diagnosed?

but if it's 2wd only, likely that's the source of your problem.

and $$$$ to fix... :(

 

 

Jamie

Don’t worry about the clutches just yet – first make sure the electrical system is working properly. When I bought mine I was all wigged out that the clutches were bad and that’s why I took the whole thing apart – to replace them. When I pulled off the extension housing everything looked brand new. Then I started chasing the electrical and found the voltage wasn’t changing.

 

By the way – if the clutches are bad they are relatively easy to replace. I’m just not sure if you can buy them separately from a whole rebuild kit. I think the kits for the whole tranny run about $150 so it’s still not that much. The only trick is getting the extension housing off and back on. I did mine in my garage and didn’t think it was too hard. You don’t even have to remove the transmission. Good luck and let us know what happens. Dave

 

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Hello Dave and everyone

When you say the voltage wasnt changing, you mean there was a short somewhere? Where did your short located at? I am having the same problem( Duty C solenoid, code 24) and about to pull everything off.

Mainly I am looking for a common location where the wiring maybe weak.

Thanks

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I wish I could find where the short is. I’ve checked everything – speed sensors, FWD fuse voltage, TPS, etc. All the inputs are good and I don’t have any error codes that show up on the TCU. But, the voltage to the Duty C solenoid is always the same 12V. So it never goes into four wheel drive. As I mentioned before, my quick and easy solution was to put a switch in the wire that goes from the TCU to the Duty C solenoid. My car originally came with the adjustable air suspension. I ripped it all out about two years ago when it died. I just used the space where the height switch was and put in another rear defroster switch from the junkyard. When I push the new defroster switch in, it connects the TCU to the solenoid and I’m in front wheel drive. When I push it again it comes out and disconnects the TCU for four wheel drive. I think the only way to find the short would be to take to a dealer who can hook it up to a select monitor and actually see the inputs and outputs from the TCU. But I hate dealers so I haven’t done it yet. Besides, I kind of like my switch – it really makes the car go in the mud and snow.

 

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After reading high and low and filtering through all of the info about subies I found the FWD fuse and to my surprise, no fuse. I grabbed a spare and plugged it in and now the red fwd dash light is on but I have FWD back. I like the idea of placing a switch to control the drive train, anything to keep money in my pocket and out of the hands of the dealers.

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  • 2 weeks later...

I have ethe same issue with my 98 Impreza OBW. I'd love to do the switch. Can someone advise where to find this wire? I'd much rather have a switch that have the car tell me I need 4wd.

 

Loved my 94 Loyale with the button in the shifter.

 

BTW, when I press the brake pedal, the dash lights come on. Sign of something related?

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