Welcome to the North American Subaru Impreza Owners Club Friday July 11, 2014
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Here you can view your subscribed threads, work with private messages and edit your profile and preferences Home Registration is free! Visit the NASIOC Store NASIOC Rules Search Find other members Frequently Asked Questions Calendar Archive NASIOC Upgrade Garage Logout
Go Back   NASIOC > NASIOC Technical > Normally Aspirated Powertrain

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.
Reply
 
Thread Tools Display Modes
Old 10-22-2012, 01:14 PM   #1
vnikulin
Scooby Newbie
 
Member#: 134247
Join Date: Dec 2006
Location: NYC
Vehicle:
2012 STI
Black

Default high speed jerking in auto cdiff mode

really need help on this please
just started noticing that in "auto" c-diff mode while driving on freeway the entire car jerks, almost feels like you hit a bump sort of, even passenger can feel this. i deal with this situation now just by switching to lock manual mode and moving cdiff all the way down.
took my car to local dealership and was not able to replicate the problem because in NYC you just can't drive steady for few minutes on parkway 70mph without hitting any bumps or getting pulled over however mechanic that went with me told me that this doesn't sound like cdiff because if it was mechanical problem that i would've heard grinding or noise of some sort at any speed and if it was due to failing sensor i'd get "service engine" light .... can anyone suggest what this might be? clutch? (mechanic did suggest that clutch pedal was high)

thanks !!
* Registered users of the site do not see these ads.
vnikulin is offline   Reply With Quote
Old 10-22-2012, 07:42 PM   #2
RaceFaceXC
NASIOC Supporter
 
Member#: 165749
Join Date: Dec 2007
Chapter/Region: South East
Location: stupid Florida
Vehicle:
2007 No YELLING
on the bus!

Default

Quote:
Originally Posted by vnikulin
really need help on this please
just started noticing that in "auto" c-diff mode while driving on freeway the entire car jerks, almost feels like you hit a bump sort of, even passenger can feel this. i deal with this situation now just by switching to lock manual mode and moving cdiff all the way down.
took my car to local dealership and was not able to replicate the problem because in NYC you just can't drive steady for few minutes on parkway 70mph without hitting any bumps or getting pulled over however mechanic that went with me told me that this doesn't sound like cdiff because if it was mechanical problem that i would've heard grinding or noise of some sort at any speed and if it was due to failing sensor i'd get "service engine" light .... can anyone suggest what this might be? clutch? (mechanic did suggest that clutch pedal was high)

thanks !!
I would suggest searching in the correct forum (transmission/driveline). You will certainly find many threads about center diff binding/jerking but usually it's during slow tight turns. Is this on an STi or a swap with DCCD system?
RaceFaceXC is online now   Reply With Quote
Old 10-22-2012, 08:23 PM   #3
vnikulin
Scooby Newbie
 
Member#: 134247
Join Date: Dec 2006
Location: NYC
Vehicle:
2012 STI
Black

Default

sorry, i tried searching for cdiff jerking etc but nothing came up, this is 2008 STI, all stock ...
i came across some articles suggesting problems during slow speeds but this is completely opposite, all happens during 70mph+
vnikulin is offline   Reply With Quote
Reply

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


All times are GMT -4. The time now is 07:42 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2014 Axivo Inc.
Copyright ©1999 - 2014, North American Subaru Impreza Owners Club, Inc.