2011 wrx RPM slip @ 4,000 - Subaru WRX Forum
 
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#1 Old 07-16-2012, 10:22 AM
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2011 wrx RPM slip @ 4,000

I have the cobb performance package (AP,DP,CB exhaust) and sf intake on my 2011 wrx and recently noticed a slip during a 3rd and 4th gear pull @ 4,000 RPM. I am running a stage 2 HWG map and had it pro tuned when installed. I was wondering if I just need another tune or if this is a good sign to buy a better clutch. would love any advice or suggestions.
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#2 Old 07-16-2012, 10:29 AM
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Are you sure the clutch is actually slipping? How many miles on the clutch? Is this your first manual car? Sounds more like you wore out the clutch than anything else. You shouldn't need an upgraded clutch with those parts. Even if your clutch is shot, I would tell you to buy an OEM clutch again anyway. A stronger clutch will just put more pressure on your transmission and is unnecessary. It's designed to slip before the gears would snap.

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#3 Old 07-16-2012, 11:27 AM
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I have only driven a manual and have never had any issues, 25,000 miles... it started after the install, it feels like it is re-engaging which made me wonder if a better clutch was needed as it only happens at 4,000 RPM. is there a solid way to test for this or do I just need to have it looked at? if I am getting a new clutch I would want to upgrade, is there a clutch that you recommend that is better but not overkill? I do plan on adding to this car down the road but in a year or two. thanks for the quick response!
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#4 Old 07-16-2012, 04:17 PM
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Try resetting your ECU and see if it does it again....Is the car simply just reving up at that rpm or are you shifting at that rpm and then it slips?

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#5 Old 07-17-2012, 09:33 PM
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Quote:
Originally Posted by Robofstop View Post
I have only driven a manual and have never had any issues, 25,000 miles... it started after the install, it feels like it is re-engaging which made me wonder if a better clutch was needed as it only happens at 4,000 RPM. is there a solid way to test for this or do I just need to have it looked at? if I am getting a new clutch I would want to upgrade, is there a clutch that you recommend that is better but not overkill? I do plan on adding to this car down the road but in a year or two. thanks for the quick response!
test is easy. find a hill, put it in 2nd, or 3rd and low RPM and go WOT. at about 3-4k the clutch should let go and the rpms should shoot up without going any where.

get the ACT HDSS

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#6 Old 07-18-2012, 07:53 AM
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Or just drive in 3rd gear, push the brake a little while also pushing on the gas. If the car revs up and you don't gain any speed then you're clutch is starting to slip. I've been driving on my slipping clutch for 9 months now because I don't have time to tear it apart.

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#7 Old 07-25-2012, 07:09 AM
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Thanks again for the replies! I have done a few tests and it is pretty clear its the clutch slipping. I actually ordered just that the ACT HDSS and i figured I should put in a new OEM just because its already taken apart. I am having it installed today so i'll see how it works. I have heard different things about breaking in the new clutch, should I just do easy driving for the first 500-1000 miles? Thanks again
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#8 Old 07-25-2012, 07:37 AM
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Yes, just take it easy for 500 miles or so

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#9 Old 07-25-2012, 08:23 AM
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Could have gotten a stock clutch for free from Subaru as long as your flywheel isn't blue.
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#10 Old 07-28-2012, 12:01 PM
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new clutch is installed... I am driving it easy for the first 500 miles but have had some shaking when starting.. all other shifts are smooth and it dosnt always shake but when it does its pretty aggressive. is this normal?
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