Welcome to the North American Subaru Impreza Owners Club Tuesday October 15, 2019
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
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.







* As an Amazon Associate I earn from qualifying purchases. 
* Registered users of the site do not see these ads. 
Reply
 
Thread Tools Display Modes
Old 09-17-2019, 02:17 PM   #1
PyroguyFTW
Scooby Newbie
 
Member#: 473226
Join Date: Aug 2017
Location: PA
Vehicle:
2012 Outback

Default Clutch slipping. What do?

So my new to me '16 is beginning to experience some major clutch slip. I really hope the clutch isn't toast, because I don't feel like spending $1500 on a replacement right now.

I really hope this just a glazed clutch, but I fear that it's worse than that. I have done 6 launches at 4500rpm, 5 with flat foot shifting set at 5500 when I would shift at 6500. Last run had a very clutch-y smell to it for a few seconds after parking. The car is Cobb stage 2. There is just over 30k on the car, and I have driven manuals before, just not an AWD turbo manual so I definitely could be doing something wrong. AFAIK I don't slip the clutch when shifting hard or when driving on the road, only when starting from a stop, which is only about 1.5k-2k fir half a second. I keep my foot on the dead pedal and use neutral at lights, so I am not particularly sure if it's my accelerating technique, the track launches, faulty clutch, or a combination of the three.

The symptoms are as follows:
5 days ago: Started on the highway in 4th at about 3200, slow roll on the gas to pass resulted in some minor slip, about 500rpm.
3 days ago: Driving casually, had some slip in 5th at about 3k. Also happened later in 4th, but about 700rpm this time. Decided to test to ensure I wasn't imagining things, used 4th to test on an uphill incline. Same result.
Yesterday: Slip in 3rd, about 500rpm worth, even at WOT. It is nearly 1k over what it should be at WOT.
Today: Slipped maybe 200rpm in second climbing a hill at part throttle.

How can I find out if it's a glazed clutch or just one that's done for? If the track launches killed it, is there a stock-like clutch that can take a few launches one night a month, such as maybe the South Bend Stage 2 Daily? Thank you guys for the help.
* Registered users of the site do not see these ads.
PyroguyFTW is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 09-17-2019, 07:37 PM   #2
bmxhotsauce
Scooby Specialist
 
Member#: 127099
Join Date: Sep 2006
Chapter/Region: BAIC
Vehicle:
02 IMPERZA WRX
BLACK

Default

the track launches will kill your clutch due to slipping it. its normal . the OE clutch is not suppose to handle that. your clutch is gone. Get a new one and have it installed. if you want to launch your car get a twin disc to help with slipping.
bmxhotsauce is offline   Reply With Quote
Old 09-17-2019, 07:45 PM   #3
jasonwrx86
Scooby Specialist
 
Member#: 472037
Join Date: Jul 2017
Chapter/Region: MWSOC
Vehicle:
2018 WRX Limited
CWP

Default

You are abusing your clutch like that and you don't think it's gonna fail?
A glazed clutch will become normal after you drive it for a while. I think your is toast. Get something that can actually handle your abuse.
jasonwrx86 is offline   Reply With Quote
Old 09-18-2019, 12:15 AM   #4
PyroguyFTW
Scooby Newbie
 
Member#: 473226
Join Date: Aug 2017
Location: PA
Vehicle:
2012 Outback

Default

Maybe I just have a different definition of abuse, but I really dont think a handful of launches at low rpm should kill a clutch, and I didn't say that being abusive won't damage it. If it is, then I guess I need to find a sturdier clutch. I dont plan on hitting the track weekly or anything, but maybe once every other month in the nicer seasons, and I don't wanna end up replacing a clutch multiple times if it can be avoided.
PyroguyFTW is offline   Reply With Quote
Old 09-18-2019, 07:59 PM   #5
jasonwrx86
Scooby Specialist
 
Member#: 472037
Join Date: Jul 2017
Chapter/Region: MWSOC
Vehicle:
2018 WRX Limited
CWP

Default

Since you bought it used, you never knew how the previous owner treated it.
4500rpm launches I wouldn't call low rpm and being AWD it's not that hard to slip the clutch too much and wear it down quickly.
jasonwrx86 is offline   Reply With Quote
Old 09-19-2019, 07:27 PM   #6
the_saintusa
Scooby Newbie
 
Member#: 171486
Join Date: Feb 2008
Chapter/Region: International
Location: Hiding from The Google
Vehicle:
2004 WRX STI
Silver

Default

As mentioned, the previous owner likely did much more damage than you. What you described is tough on the clutch, but I would expect that any clutch would be able to hold up after what you have done. However, with that type of driving since 2016 (previous owner), than I would expect the clutch to be on its death bed.
the_saintusa 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 09:52 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2019 Axivo Inc.
Copyright ©1999 - 2019, North American Subaru Impreza Owners Club, Inc.

As an Amazon Associate I earn from qualifying purchases.