Jump to content


Welcome to Ultimate Subaru Message Board, my lurker friend!

Welcome to Ultimate Subaru Message Board, an unparalleled Subaru community full of the greatest Subaru gurus and modders on the planet! We offer technical information and discussion about all things Subaru, the best and most popular all wheel drive vehicles ever created.

We offer all this information for free to everyone, even lurkers like you! All we ask in return is that you sign up and give back some of what you get out - without our awesome registered users none of this would be possible! Plus, you get way more great stuff as a member! Lurk to lose, participate to WIN*!
  • Say hello and join the conversation
  • Subscribe to topics and forums to get automatic updates
  • Get your own profile and make new friends
  • Classifieds with all sorts of Subaru goodies
  • Photo hosting in our gallery
  • Meet other cool people with cool cars
Seriously, what are you waiting for? Make your life more fulfilling and join today! You and your Subaru won't regret it, we guarantee** it.

* The joy of participation and being generally awesome constitutes winning
** Not an actual guarantee, but seriously, you probably won't regret it!

Serving the Subaru Community since May 18th, 1998!

Guest Message by DevFuse
 

Photo
- - - - -

Erratic Shifting 03 Legacy, 4EAT


  • Please log in to reply
7 replies to this topic

#1 afterbang

afterbang

    USMB is life!

  • Members
  • 159 posts
  • Sandy, OR

Posted 12 June 2013 - 08:40 AM

Hey guys,

So I just got a call from my wife and she is telling me that the transmission in her Legacy keeps shifting back and forth from 3rd to 4th gear every 3 seconds or so and will not stay in a single gear on flat highway. Already being out 15 miles when it started doing this, I told her to put it into 3rd gear manually and just take it easy, but she's saying the car is pretty much undrivable when you put it in D.

The car has 96k and there are no transmission warning lights on at all. I have driven the car many times and while on hilly terrain I wish the transmission was more responsive, I haven't felt like anything was functioning out of the ordinary.

Any thoughts?

#2 ivans imports

ivans imports

    1000+ Super USER!

  • Members
  • 2,954 posts
  • lumby bc canada

Posted 12 June 2013 - 09:06 AM

have you changed spin on fillter ? any dents in pan? and does it hesatate when puting into gear first time cold or hesatate when puting in reverse also dose speedo work properly and cruise ? also check main harness ground bolt on ps top of intake is clean and tight this is also your trans ground



#3 johnceggleston

johnceggleston

    Lite Master of the Subaru

  • Gold Subscribers
  • 6,403 posts
  • Virginia

Posted 12 June 2013 - 09:16 AM

is there a flashing AT TEMP light on the dash.??

 

i had both symptoms and it was a loose ground wire on the engine.

simple fix, but very hard to identifdy.

 

check for loose wires bolted to the engine, mine was near the coil, passenger side.


Edited by johnceggleston, 12 June 2013 - 09:23 AM.


#4 Gloyale

Gloyale

    It's a sickness

  • Members
  • 9,516 posts
  • Corvallis, OR PNW

Posted 12 June 2013 - 11:46 AM

Could be a TPS (throttle position sensor) malfunction.

 

Any check engine codes?



#5 afterbang

afterbang

    USMB is life!

  • Members
  • 159 posts
  • Sandy, OR

Posted 12 June 2013 - 12:25 PM

No CEL or flashing lights at start up. Once I get the car back home, I'll get back to you guys with more info. The car has a perfect maintenance history through the dealership since new from its previous owner and all I've done to it is a timing belt kit...

I'm just hoping it's nothing too serious.

#6 afterbang

afterbang

    USMB is life!

  • Members
  • 159 posts
  • Sandy, OR

Posted 13 June 2013 - 09:37 PM

I cannot find anything out of the ordinary. I was able to get the service records from the previous owner since they bought it new at the Subaru dealer I buy parts from and had all work performed there.

Never missed a service and the transmission was serviced at 60k. They did a flush and fill with a new filter...

The only thing I did before the tranny started acting up was switch the oil from 5w-30 conventional to 5w-40 rotella t6. When I first got it, since the dealer only replaced the timing belt when they replaced the head gaskets because they were leaking, I put in a new timing belt kit because the idlers and tensioner weren't done. The service records note that the head gasket on the passenger side was weeping, but they didn't feel like it was a big enough deal to replace them.

Hasn't acted up since that one time, but I do notice that the tranny seems to run in too high of gear when going up hills. I just tap the accelerator to get it to downshift, but nothing else feels out of whack.

I was thinking doing a drain and fill a few times with Amsoil ATF. Do you all think that's warranted at this point? I have had my Outback with a 5MT for like ten years and another 93 legacy with a 4EAT, but it never gave me problems. I have absolutely no experience with these things so any advice is very much appreciated!

#7 grossgary

grossgary

    Elite Master of the Subaru

  • Members
  • 20,084 posts
  • WV

Posted 14 June 2013 - 05:41 AM

i'm doubtful a fluid change will help at all, but i suppose it's worth a shot.   i would definitely check the fluid level and look at it and smell it.

 

i'd lean towards swapping the TPS, should be able to get a used one for only a couple bucks.  they're super easy to replace and rarely fail so not worth price of new.  the H6 vehicles have quite a few TPS failures in this same year, not the H4's but it's possible.  if i could find the used one i have i'd send it for a few bucks, as it is i don't have time to look for it.



#8 ivans imports

ivans imports

    1000+ Super USER!

  • Members
  • 2,954 posts
  • lumby bc canada

Posted 14 June 2013 - 09:20 AM

Check main trans conectors are pluged in all the way and check air preshure in tires have seen a low tire confuse the trans ecu






0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users