is my clutch slipping?

abhishriv · 04-09-2012, 10:22 AM

the other day i was driving spiritedly, and I upshifted from 2nd to 3rd around 4000rpm. but once it got into 3rd and i let off the clutch i felt it slow down the car a tiny bit (as if i was downshifting) but i was slightly pressing accelerator and i felt as if the clutch was just spinning in place for a second. I didnt notice the rpms shoot up or anything. and a couple days before, accelerating from stand still i got this slight swaying action from the car (front back front back front back). could this be my clutch slowly going? the car is a 2007 e93 335i. currently just hit 100000km this weekend and its a CPO. and i did learn manual driving on this car. i was almost certain its the clutch... but most of the time it seems fine, so i'm not so sure anymore .

anyone know what it could be?

335xi_zer0 · 04-09-2012, 10:26 AM

Off topic but you learned manual on a 300hp 2007 BMW? What happened to the days where people got a beater and learned on that? 1992 Celica was mine.

As for the clutch, I've only ever heard of clutch slipping upon acceleration and the RPMs fly up. Your clutch shouldn't be THAT bad, most clutches should be able to go upwards of 100,000 MILES. Unless you are an awful manual driver I doubt it's your clutch.

abhishriv · 04-09-2012, 10:34 AM

lol well i practiced on a bunch of friends beater cars before purchasing the bmw. but i did stall it quite a bit in the first couple weeks or so. i think my manual driving is pretty good now and have even taken courses like bmw driver training. any tests to see if it could be the clutch? just out of curiosity how much would it cost to replace clutch? $1500?

vasillalov · 04-09-2012, 10:40 AM

There is a clutch delay valve on these cars. This valve introduces some clutch slip. You can remove it or modify it to improve the clutch operation.

335xi_zer0 · 04-09-2012, 10:41 AM

I'm unsure, my knowledge base with clutches is pretty low. I bet some other forum members would be able to help though.

If it IS your clutch (I still strongly believe it isn't), the repair is typically ~$700. Clutch/flywheel are cheap, it's the labor.

abhishriv · 04-09-2012, 10:48 AM

Quote:

Originally Posted by vasillalov

There is a clutch delay valve on these cars. This valve introduces some clutch slip. You can remove it or modify it to improve the clutch operation.

oh yea! i forgot about the CDV for a second.. that actually sounds like what it might have been considering i was shifting quickly. i'll try that first.

marv85 · 04-09-2012, 10:53 AM

Quote:

Originally Posted by 335xi_zer0

I'm unsure, my knowledge base with clutches is pretty low. I bet some other forum members would be able to help though.

If it IS your clutch (I still strongly believe it isn't), the repair is typically ~$700. Clutch/flywheel are cheap, it's the labor.

Assuming you are going to resurface the flywheel, the price is correct. If the flywheel cannot be resurfaced, it costs ~1k by itself

marv85 · 04-09-2012, 10:55 AM

OP, I agree with he above. however, if you were shifting very fast into third, you might have induced shift bog where you feel like nothing is happening for a while before it takes off again.

My clutch was replaced recently because it was slipping. It as slipping on s2+ only and it would happen when I shift fast into third (the rpm would shoot a 1000 higher)

335xi_zer0 · 04-09-2012, 11:04 AM

Quote:

Originally Posted by marv85

OP, I agree with he above. however, if you were shifting very fast into third, you might have induced shift bog where you feel like nothing is happening for a while before it takes off again.

My clutch was replaced recently because it was slipping. It as slipping on s2+ only and it would happen when I shift fast into third (the rpm would shoot a 1000 higher)

That brings up a good question. Are the stock clutches good until S2+? At that point should someone consider getting a stage2 clutch?

marv85 · 04-09-2012, 11:24 AM

Quote:

Originally Posted by 335xi_zer0

That brings up a good question. Are the stock clutches good until S2+? At that point should someone consider getting a stage2 clutch?

The clutches are good at stage2+. My clutch was worn down. I gave it hell for a long time. I am at 75k miles now.

even though I would slip when I shift hard, If I slow down my shift it would power nicely... but it was only a matter of time. I upgraded to ACT street and love the performance (till now

). it handles the power very nicely during fast shift. for the price it's definitely worth it!

marv85 · 04-09-2012, 11:25 AM

Quote:

Originally Posted by 335xi_zer0

That brings up a good question. Are the stock clutches good until S2+? At that point should someone consider getting a stage2 clutch?

From your mods I guess you're running stage2+. how's your clutch holding up?

335xi_zer0 · 04-09-2012, 11:36 AM

Quote:

Originally Posted by marv85

From your mods I guess you're running stage2+. how's your clutch holding up?

My buddy just got an ACT clutch and flywheel he loves it. I'm running auto actually, so no issues :P

I looked for a while for a 6MT but in the end 4 doors and xi was most important to me. That being said it was obviously tough to find those requirements.

marv85 · 04-09-2012, 11:39 AM

Quote:

Originally Posted by 335xi_zer0

My buddy just got an ACT clutch and flywheel he loves it. I'm running auto actually, so no issues :P

I looked for a while for a 6MT but in the end 4 doors and xi was most important to me. That being said it was obviously tough to find those requirements.

Gotcha

, the MT was a must for me hehe

GeorgiaTech335coupe · 04-09-2012, 02:39 PM

Clutch install is ~$500. If you are close to FBO, might as well throw in an ACT clutch which costs $500. You'll have to figure out if you want a new/resurface your flywheel when you can take a look at it. I reused mine with my ACT and haven't had any problems. Lots of drag strip runs on it already.

achien · 04-09-2012, 04:04 PM

Quote:

Originally Posted by abhishriv

the other day i was driving spiritedly, and I upshifted from 2nd to 3rd around 4000rpm. but once it got into 3rd and i let off the clutch i felt it slow down the car a tiny bit (as if i was downshifting) but i was slightly pressing accelerator and i felt as if the clutch was just spinning in place for a second. I didnt notice the rpms shoot up or anything. and a couple days before, accelerating from stand still i got this slight swaying action from the car (front back front back front back). could this be my clutch slowly going? the car is a 2007 e93 335i. currently just hit 100000km this weekend and its a CPO. and i did learn manual driving on this car. i was almost certain its the clutch... but most of the time it seems fine, so i'm not so sure anymore .

anyone know what it could be?

If your engine doesn't stall on 4th gear when starting from a stand still, then your clutch is toasted.

04-09-2012, 10:22 AM	#1
abhishriv Major 100 Rep 1,384 Posts Drives: 2007 335i Coupe (Space grey) Join Date: Oct 2011 Location: Toronto iTrader: (0)	is my clutch slipping? the other day i was driving spiritedly, and I upshifted from 2nd to 3rd around 4000rpm. but once it got into 3rd and i let off the clutch i felt it slow down the car a tiny bit (as if i was downshifting) but i was slightly pressing accelerator and i felt as if the clutch was just spinning in place for a second. I didnt notice the rpms shoot up or anything. and a couple days before, accelerating from stand still i got this slight swaying action from the car (front back front back front back). could this be my clutch slowly going? the car is a 2007 e93 335i. currently just hit 100000km this weekend and its a CPO. and i did learn manual driving on this car. i was almost certain its the clutch... but most of the time it seems fine, so i'm not so sure anymore . anyone know what it could be?
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04-09-2012, 10:26 AM	#2
335xi_zer0 Second Lieutenant 14 Rep 280 Posts Drives: Monaco Blue 2007 335xi Join Date: Sep 2011 Location: Northern VA iTrader: (3)	Off topic but you learned manual on a 300hp 2007 BMW? What happened to the days where people got a beater and learned on that? 1992 Celica was mine. As for the clutch, I've only ever heard of clutch slipping upon acceleration and the RPMs fly up. Your clutch shouldn't be THAT bad, most clutches should be able to go upwards of 100,000 MILES. Unless you are an awful manual driver I doubt it's your clutch. __________________ 2007 E90 335xi - "Sera" aFe Stage 2 DCI \| AE Performance Exhaust \| COBB Accessport \| HPB Interior LED Kit \| M6 Wheels \| ER Charge Pipe \| MTEC LED Angel Eyes \| Helix Intercooler
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04-09-2012, 10:34 AM	#3
abhishriv Major 100 Rep 1,384 Posts Drives: 2007 335i Coupe (Space grey) Join Date: Oct 2011 Location: Toronto iTrader: (0)	lol well i practiced on a bunch of friends beater cars before purchasing the bmw. but i did stall it quite a bit in the first couple weeks or so. i think my manual driving is pretty good now and have even taken courses like bmw driver training. any tests to see if it could be the clutch? just out of curiosity how much would it cost to replace clutch? $1500?
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04-09-2012, 10:40 AM	#4
vasillalov Mad Linux Guru On The Loose 1130 Rep 5,400 Posts Drives: 2008 335i Sedan, 2023 M3 Join Date: Aug 2009 Location: Chicago, IL iTrader: (5) Garage List 2023 BMW M3 [0.00] 2008 335i E90 [8.00]	There is a clutch delay valve on these cars. This valve introduces some clutch slip. You can remove it or modify it to improve the clutch operation. __________________
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04-09-2012, 10:41 AM	#5
335xi_zer0 Second Lieutenant 14 Rep 280 Posts Drives: Monaco Blue 2007 335xi Join Date: Sep 2011 Location: Northern VA iTrader: (3)	I'm unsure, my knowledge base with clutches is pretty low. I bet some other forum members would be able to help though. If it IS your clutch (I still strongly believe it isn't), the repair is typically ~$700. Clutch/flywheel are cheap, it's the labor. __________________ 2007 E90 335xi - "Sera" aFe Stage 2 DCI \| AE Performance Exhaust \| COBB Accessport \| HPB Interior LED Kit \| M6 Wheels \| ER Charge Pipe \| MTEC LED Angel Eyes \| Helix Intercooler
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04-09-2012, 10:55 AM	#8
marv85 Colonel 71 Rep 2,626 Posts Drives: '07 E92 335i MT Join Date: Jun 2010 Location: Bay Area iTrader: (7)	OP, I agree with he above. however, if you were shifting very fast into third, you might have induced shift bog where you feel like nothing is happening for a while before it takes off again. My clutch was replaced recently because it was slipping. It as slipping on s2+ only and it would happen when I shift fast into third (the rpm would shoot a 1000 higher) __________________ '18 F80 M3 Comp 6MT - Stock '07 E92 335i 6MT- HP650, inlets/outlets, ER FMIC, VRSF CP, LPFP stg2, CSF rad, 'is Aux rad, ER OC, Ohlins, M control arms, eibach front sway bar. '05 C55 AMG SOLD - '22 Tesla M3P \| '10 E92 335i M, 6MT \| '07 E90 335i, PTF COBB E50, FBO, HFS4
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04-09-2012, 02:39 PM	#14
GeorgiaTech335coupe Lieutenant Colonel 78 Rep 1,883 Posts Drives: Black BMW 335i coupe Join Date: Mar 2007 Location: USA iTrader: (0)	Clutch install is ~$500. If you are close to FBO, might as well throw in an ACT clutch which costs $500. You'll have to figure out if you want a new/resurface your flywheel when you can take a look at it. I reused mine with my ACT and haven't had any problems. Lots of drag strip runs on it already. __________________ Legal Disclaimer: Anything I or anyone else says about my vehicle on this website(e90post.com or any affiliated or nonaffiliated sites), pertaining to modifications, is only to gain acceptance from my/our peers, and does not actually represent anything actually existing on my car, and thus, cannot be held against me in any issues, i.e. warranty claims, that may arise.
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