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-   -   Surges forward when i turn engine off. (http://legacygt.com/forums/showthread.php?t=204282)

Rick Towers 03-24-2013 07:17 AM

Surges forward when i turn engine off.
 
I have a 1996 Subaru Legacy Wagon, EJ22 engine, Auto Transmission.
It surges forward after i shut the engine off, this happens after driving for 2 miles or 200 miles, it always does it.

Any ideas why this happens? :confused:

johnegg 03-24-2013 12:52 PM

you have torque bind. do a search and you will find a ton of info.

note:
1/ shift to N and wait before you shift to P to shut it off.
2/ test drive the car in slow tight circles on dry pavement and report back.
3/ put a fuse, any fuse, in the FWD holder under the hood on the passenger side near the fire wall and the wiper motor. problem gone?
4/ all of your tires should be the same brand, tread, size, inflation and wear. they should all be with in 1/4 inch in circumference (not diameter). mis-matched tires can cause binding.

Kennyfvholla 03-24-2013 08:13 PM

I agree that issue is most likely torque bind. And I second every single suggestion John has made.

Rick Towers 03-25-2013 04:35 AM

Thanks! I will check into everything you said. Can a torque binding problem be the culprit for my subaru to be shuting itself off too at a red light? I also found this info too.
http://legacycentral.org/library/torquebind.htm

Hemingway 03-25-2013 05:26 AM

Good reference. Thanks.

Off Road SHO 03-25-2013 05:52 AM

Yeah, I just went through the whole torque bind ritual on my 96 and after ALL the cussin and kickin, it turned out that John's item #4 was the culprit. Even though all 4 tires were the same size, two were from a different manufacturer. I even did a crude diameter measurement which showed that the tires were the same approximate diameter, but it wasn't until I did a rolling circumference measurement that John noticed that my tires were way off.

I swapped the two "smaller" tires to the right side and torque bind is gone.

Tom

Rick Towers 03-26-2013 05:03 AM

Well, i installed the fuse for the FWD, still have the problem. I did notice that all 4 tires are the same size but, the rear passenger tire is not the same brand or tread as the other three. I think i'll get 4 new tires today. The tread is about less than a 1/4" on the two front and i have about a 1/4" tread on the back.

Rick Towers 03-26-2013 05:30 AM

Well, i installed the fuse for the FWD, still have the problem. I did notice that all 4 tires are the same size but, the rear passenger tire is not the same brand or tread as the other three. I think i'll get 4 new tires today. The tread is about less than a 1/4" on the two front and i have about a 1/4" tread on the back.

I'll keep you posted after the new tires are installed. Thanks for your help.

johnegg 03-26-2013 08:05 AM

Quote:

Well, i installed the fuse for the FWD, still have the problem.
do you have a red FWD light on the dash when the fuse is in?

Rick Towers 03-27-2013 04:23 AM

Quote:

Originally Posted by johnegg (Post 4359857)
do you have a red FWD light on the dash when the fuse is in?

No, i had no FWD red light on the dash with the fuse in.

johnegg 03-27-2013 05:30 AM

that means your duty c is probably bad.

does your AT Temp light flash 16 times at start up.?

Rick Towers 03-27-2013 08:02 AM

Quote:

Originally Posted by johnegg (Post 4361488)
that means your duty c is probably bad.

does your AT Temp light flash 16 times at start up.?

Yes sir! It sure does.

Rick Towers 03-27-2013 08:20 AM

Quote:

Originally Posted by johnegg (Post 4361488)
that means your duty c is probably bad.

does your AT Temp light flash 16 times at start up.?

Where can i buy a "Duty C" cheap one? I don't see them at the auto parts store.

Kennyfvholla 03-27-2013 09:46 AM

You need to buy it from the dealer. If I remember correctly, it cost somewhere just a bit north of $100. Sometimes you can find them on eBay cheaper.

The duty-C is what controls the center differential clutch. It causes plenty of different binding issues when it fails.

It is located in the tail end of the transmission.

http://i46.tinypic.com/352rb0l.jpg

Rick Towers 03-27-2013 11:07 AM

Quote:

Originally Posted by Kennyfvholla (Post 4361841)
You need to buy it from the dealer. If I remember correctly, it cost somewhere just a bit north of $100. Sometimes you can find them on eBay cheaper.

The duty-C is what controls the center differential clutch. It causes plenty of different binding issues when it fails.

It is located in the tail end of the transmission.

http://i46.tinypic.com/352rb0l.jpg

I'm being told that it's a good idea to replace the AWD clutch discs too while they are in there. What do you think??


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