Jump to content
Ultimate Subaru Message Board

2005 WRX 4EAT Problem shifting from 3rd to 4th under full throttle

Recommended Posts

I have a 2005 Saab 9-2x Aero (WRX) 141,000 miles, completely stock, with the 4EAT automatic.   Under full throttle, at about 70 mph, it will shift from 3rd to neutral (and redline) rather than shift to 4th.  I must let off the throttle and give it a few seconds to find 4th gear when this happens.  Under normal acceleration, it has no problem going from 3rd to 4th gear. 


I have just replaced the transmission fluid and filter (using genuine Subaru stuff) and still the problem persists.


I have never driven anything with an automatic transmission before and really don't know where to start with this, it is also difficult for me to find anything on the web about this exact problem, so any help would be appreciated.  Thank you!

Link to comment
Share on other sites

3 drain and fills are required to get about 85% fresh fluid because of how much is left in the torque converter. Unless you changed your fluid in a manner that got all of it out.


some folks have had good results with a bottle of Trans-X for things like delayed engagement - but it won't fix a broken a transmission.

Link to comment
Share on other sites

Yes it *is* a special transmission. The WRX auto is different than all the others. It has a special tailshaft section with a more advanced transfer system.


You throw away fluid if you want on doing drain and fills but that type of behavior is unlikely to be solved by it. You can't put back worn out clutch material without opening it up. There's no adjustments that can be made externally so that means opening it up and if you do that you might as well overhaul it.



Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • Create New...