Welcome to the North American Subaru Impreza Owners Club Tuesday January 16, 2018
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
Go Back   NASIOC > NASIOC Technical > Transmission (AT/MT) & Driveline

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads. 
Thread Tools Display Modes
Old 10-30-2007, 06:37 PM   #1
Scooby Specialist
Member#: 44945
Join Date: Oct 2003
Chapter/Region: SCIC
Location: santa monica, ca
06 LGT wag

Question 02 WRX 4EAT Issue: Car won't move in Drive or Reverse when cold. Loud humming too.

Hi everyone, I'm hoping someone has had some experience with the infamous WRX 4EAT weirdness. From the searches I just did, I can see that there are a gambit of issues with our WRX automatic transmissions that may resemble my problem or could be leading me down the wrong path.

When I start my car up in the morning, I usually let it warm up, but sometimes I am in a hurry and just shift into Drive or Reverse. When I take my foot off the brake pedal to allow the car to coast, it doesn't move. I have to tap the gas pedal a bit to get the car to move. When it is warmed up, it's less severe, in that it hesitates for a second and then goes, but when it's cold, the car just doesn't go unless you hit the gas. This sometimes happens at a traffic light where I stop, and then step on the gas again, and it hesitates for a second. The latter is not as frequent, though.

In addition to this, there is also a loud humming noise coming from the transmission or front differential (somewhere up there) whenever my foot is on the gas pedal. My mechanic said it was the transmission because the sound only happens when the gas pedal is engaged, and he said its normal for cars with high mileage (100k miles), but it just doesn't seem normal to me, as it is really loud. I know its not the typical rear diff humming noise that people have documented, I used to have another bugeye with the rear diff noise, and this is totally different.

I'm not sure if the two issues are related but it seems likely given their proximity to each other and the inconsistency of WRX 4EAT quality.

Any advice would be greatly appreciated. Thanks in advance!!!

* Registered users of the site do not see these ads.
YinUCSD is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 10-30-2007, 10:58 PM   #2
Scooby Specialist
Member#: 162534
Join Date: Oct 2007
Chapter/Region: RMIC
Location: Pleasant Grove, Ut
2005 FXT, 293ft/lbs
263whp, Silver


When was the last time you had it serviced? Check the fluid and smell it to see if its burnt.
roloc31 is offline   Reply With Quote
Old 10-30-2007, 11:02 PM   #3
Scooby Newbie
Member#: 36963
Join Date: May 2003
Chapter/Region: SCIC
Location: socal

have you checked the fluid level when the car is warm?

Per factory service manual -
Drive 3-6 miles to warm up the fluid from cold (104-140F) (I drive for at least 10-15 minutes to make sure the fluid is in the 'hot' range - 140-176F)
Park on a level surface
Select each shifter position (P,R,N,D,3,2,1) and put back in park
Leave car idling for 1-2 minutes
Check fluid level (dipstick next to the intercooler on the driver's side)
Fluid should be above the center of the upper and lower marks when hot or below the center of the two marks when cold.
DanWRX is offline   Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Grinding when trying to put in first or reverse KasparP Transmission (AT/MT) & Driveline 20 04-11-2010 01:22 PM
02 WRX 4EAT rear LSD swapped into a 02 Impreza OS 4EAT? Subpar Transmission (AT/MT) & Driveline 9 08-04-2008 04:10 PM
HELP: my car won't shift into 3rd or reverse?! qtr_wrx Transmission (AT/MT) & Driveline 3 05-03-2007 01:28 PM
My car probably won't start in the morning due to cold. What should I do? bruticus Service & Maintenance 22 01-15-2004 01:15 PM
My car probably won't start in the morning due to cold. Any suggestions? bruticus Tri-State Area Forum 8 01-14-2004 02:08 PM

All times are GMT -4. The time now is 02:37 PM.

Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2018 Axivo Inc.
Copyright ©1999 - 2017, North American Subaru Impreza Owners Club, Inc.