6 Speed 2nd Gear Grinding

03Saleen · 07-06-2015, 11:36 PM

Under full throttle, and shifting quickly more than 50% of the time 2nd grinds. Anyone else have this problem?

SakhirM4 · 07-06-2015, 11:41 PM

Not me

MasterC17 · 07-07-2015, 09:59 AM

Every manual BMW I've owned I've had this happen to me every once in a while. It's driver error, nothing else.

nathangracey · 07-07-2015, 05:52 PM

Yeah once in 20 times mine will do the same thing. I think it's just me. Need to press the clutch all the way instead of my normal 70%.

Mike@N54Tuning.com · 07-07-2015, 06:32 PM

Quote:

Originally Posted by nathangracey

Yeah once in 20 times mine will do the same thing. I think it's just me. Need to press the clutch all the way instead of my normal 70%.

Most likely explanation.

Mike

YasM3 · 07-07-2015, 06:43 PM

Driver Error......

rr006rbc · 07-07-2015, 07:01 PM

I don't usually go WOT in 1st a lot but when I do I have yet to experience a grinding going into second at ALL in my F80. I never had it happen to me in my 2013 E92 335i either. Only in my Hondas/Acuras lol.

Taibeast · 07-08-2015, 01:02 PM

This happens to me as well, I swear i stomp on my clutch to make sure it's to the floor...

W/// · 07-08-2015, 01:05 PM

Quote:

Originally Posted by 03Saleen

Under full throttle, and shifting quickly more than 50% of the time 2nd grinds. Anyone else have this problem?

You need to take your time and be deliberate.
BMW MT's don't like to be rushed like that through the first couple of gears.

dmk08 · 07-08-2015, 01:06 PM

Sounds like your hand is faster than your foot.

BIGW0RM · 07-08-2015, 02:14 PM

My E92 does this. My four STI's did not, nor did 3 integras and two hondas before them.

This IMO is a BMW thing that you have to work around.

6speeds · 07-08-2015, 04:20 PM

Yeh this used to happen when i first got the car and racing quick shifting. i just lernd to fully depress the clutch faster problem solved

03Saleen · 07-08-2015, 09:14 PM

The clutch is fully on the floor, I've owned manual cars my entire life. I'm 6'7" trust me I've got long legs, its fully on the floor. If I'm shifting fast it does it. It only does it in second no other gear.

moveswiftly · 07-09-2015, 12:40 AM

Get a clutch stop

Accel Junky · 07-09-2015, 07:32 AM

Are you sure you aren't hearing the ebrake bracket grind against the driveshaft? I can punch it in 2nd and it will sound exactly like a gear grind all the way to redline...perhaps you are getting that momentarily when you shift into 2nd.

The current fix is to bend the ebrake bracket but I'm waiting until there is a solution to replace or rebalance the driveshaft because I believe that is the problem and I don't want to be stuck with replacing a carbon fiber driveshaft outside of warranty...

Autotech · 07-11-2015, 12:12 AM

happened to me at first, then i adjusted how i drove the car, i dont "powershift" 1-2 shifts anymore...its a quick but i care more about it being safe then quick. then 2+ i can powershift through no issues

Taibeast · 07-11-2015, 06:52 PM

I'm having a feeling this might be bad synchros... I've driven manuals for quite a while ( Since I was 18, I'm 22 now.) and I've only ran into this problem In my 350z which was known for having back synchros in certain gears.

aclockwrk · 07-12-2015, 09:11 AM

No problem here, I can shift as quickly as i can with no grind.

F80AYM3 · 07-12-2015, 09:29 AM

Quote:

Originally Posted by 03Saleen

Under full throttle, and shifting quickly more than 50% of the time 2nd grinds. Anyone else have this problem?

Bring it back to dealer and have it check.

Bluesun · 07-12-2015, 12:16 PM

My E92 335i has done this as long as I can remember. I have learned to avoid shifting quickly from first to second under heavy accel. Interesting to hear the F80's still do it.

TRZ06 · 07-21-2015, 10:40 PM

My E90 M3 did this, it sucks and kills the fun.

I was hoping they fixed this with this new tranny, but I guess not. Glad I am ordering DCT this time around.

italyix · 07-24-2015, 02:38 PM

Not normal at all.

My E90 USED to do this, turned out the syncros were shot. Dealer replaced my transmissions and I quickly switched to Redline transmission fluid and what do you know? Second gear grind GONE. If the grind was normal, then this issue would be happening again, it does not.

OP, switch to another tranny fluid, IMO the stock fluid is too thick and does not allow for proper slip of syncros.

On a side note, I shift from 1 -> 2 near redline and I have a CAE shifter, so there is added stress there as well. Butter smooth every time.

07-06-2015, 11:36 PM	#1
03Saleen First Lieutenant 146 Rep 334 Posts Drives: 2015 BMW M4 Join Date: Mar 2014 Location: Richmond, VA iTrader: (0)	6 Speed 2nd Gear Grinding Under full throttle, and shifting quickly more than 50% of the time 2nd grinds. Anyone else have this problem?
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07-06-2015, 11:41 PM	#2
SakhirM4 Major General 10785 Rep 8,852 Posts Drives: '15 SO M4/'20 Z4 M40i Join Date: Jul 2014 Location: Austin, TX iTrader: (0) Garage List 2020 BMW Z4 M40i [10.00] 2015 BMW M4 [8.76]	Not me __________________ Tejas Chapter, BMW CCA, mem #23915, President 27 years, www.tejaschapter.org
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07-07-2015, 09:59 AM	#3
MasterC17 Captain 329 Rep 984 Posts Drives: 2015 BMW M3 Join Date: Aug 2014 Location: Massachusetts iTrader: (3)	Every manual BMW I've owned I've had this happen to me every once in a while. It's driver error, nothing else. __________________ 2009 X5d \| 2007 E90 Track \| 2002 M3 Track \| 1991 535i Track
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07-07-2015, 05:52 PM	#4
nathangracey Private 27 Rep 57 Posts Drives: aw m4 6mt Join Date: Dec 2014 Location: utah iTrader: (0)	Yeah once in 20 times mine will do the same thing. I think it's just me. Need to press the clutch all the way instead of my normal 70%.
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07-07-2015, 06:43 PM	#6
YasM3 Lieutenant 258 Rep 487 Posts Drives: A BMW Join Date: Apr 2014 Location: Out here iTrader: (0)	Driver Error......
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07-07-2015, 07:01 PM	#7
rr006rbc Colonel 1204 Rep 2,818 Posts Drives: '23 M440i GC Join Date: Mar 2013 Location: California iTrader: (38)	I don't usually go WOT in 1st a lot but when I do I have yet to experience a grinding going into second at ALL in my F80. I never had it happen to me in my 2013 E92 335i either. Only in my Hondas/Acuras lol.
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07-08-2015, 01:02 PM	#8
Taibeast New Member 6 Rep 27 Posts Drives: Metallic Grey BMW M4 Join Date: May 2015 Location: SEATTLE, WA iTrader: (0)	This happens to me as well, I swear i stomp on my clutch to make sure it's to the floor...
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07-08-2015, 01:06 PM	#10
dmk08 Gone Fishin’ 7318 Rep 12,125 Posts Drives: Walks Join Date: Jul 2012 Location: Atlanta iTrader: (19)	Sounds like your hand is faster than your foot.
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07-08-2015, 02:14 PM	#11
BIGW0RM You got my money? 3156 Rep 4,646 Posts Drives: Ice Cream Truck Join Date: Jul 2011 Location: ///OC iTrader: (14) Garage List 2022 BMW M3 [9.50]	My E92 does this. My four STI's did not, nor did 3 integras and two hondas before them. This IMO is a BMW thing that you have to work around. __________________ 2022 G80 M3 Competition X / 2020 Range Rover Sport P525 / 2023 Ford Raptor
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07-08-2015, 04:20 PM	#12
6speeds Private First Class 34 Rep 155 Posts Drives: M3 Join Date: Feb 2015 Location: Manual RWD iTrader: (0)	Yeh this used to happen when i first got the car and racing quick shifting. i just lernd to fully depress the clutch faster problem solved
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07-08-2015, 09:14 PM	#13
03Saleen First Lieutenant 146 Rep 334 Posts Drives: 2015 BMW M4 Join Date: Mar 2014 Location: Richmond, VA iTrader: (0)	The clutch is fully on the floor, I've owned manual cars my entire life. I'm 6'7" trust me I've got long legs, its fully on the floor. If I'm shifting fast it does it. It only does it in second no other gear.
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07-09-2015, 12:40 AM	#14
moveswiftly Colonel 381 Rep 2,926 Posts Drives: Cayman GT4, 135i Join Date: Apr 2008 Location: NJ iTrader: (12) Garage List 2012 335iS [0.00]	Get a clutch stop __________________ Current: M2CS Gone but not forgotten: Cayman GT4, M2C, 2011 135i, E83 X3 6MT, 2016 SO M3, 2012 335iS, 2010 135i and 2006 e90 325xi
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07-09-2015, 07:32 AM	#15
Accel Junky High on Acceleration 671 Rep 1,439 Posts Drives: 08 M3, 90 GTR, 21 Gladiator Join Date: Mar 2008 Location: Georgia, USA iTrader: (6)	Are you sure you aren't hearing the ebrake bracket grind against the driveshaft? I can punch it in 2nd and it will sound exactly like a gear grind all the way to redline...perhaps you are getting that momentarily when you shift into 2nd. The current fix is to bend the ebrake bracket but I'm waiting until there is a solution to replace or rebalance the driveshaft because I believe that is the problem and I don't want to be stuck with replacing a carbon fiber driveshaft outside of warranty...
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07-11-2015, 12:12 AM	#16
Autotech Private First Class 37 Rep 113 Posts Drives: F80 M3 Join Date: Feb 2014 Location: United States iTrader: (0)	happened to me at first, then i adjusted how i drove the car, i dont "powershift" 1-2 shifts anymore...its a quick but i care more about it being safe then quick. then 2+ i can powershift through no issues __________________ John Schroeder 2015 M3 4DR - SSII, 6sp, HK www.JDS-Photos.com @JDS_Photos-instagram @JDS-Photos - FB
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07-11-2015, 06:52 PM	#17
Taibeast New Member 6 Rep 27 Posts Drives: Metallic Grey BMW M4 Join Date: May 2015 Location: SEATTLE, WA iTrader: (0)	I'm having a feeling this might be bad synchros... I've driven manuals for quite a while ( Since I was 18, I'm 22 now.) and I've only ran into this problem In my 350z which was known for having back synchros in certain gears.
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07-12-2015, 09:11 AM	#18
aclockwrk Second Lieutenant 55 Rep 255 Posts Drives: '15 M3 6spd Join Date: Dec 2011 Location: South Jersey iTrader: (2)	No problem here, I can shift as quickly as i can with no grind.
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07-12-2015, 12:16 PM	#20
Bluesun sudo su - 52 Rep 236 Posts Drives: 2018 McLaren 570S Spider Join Date: Sep 2010 Location: Ohio - CLE iTrader: (0)	My E92 335i has done this as long as I can remember. I have learned to avoid shifting quickly from first to second under heavy accel. Interesting to hear the F80's still do it.
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07-21-2015, 10:40 PM	#21
TRZ06 Lieutenant Colonel 629 Rep 1,753 Posts Drives: 16' M3 Join Date: Apr 2007 Location: Bay Area, CA iTrader: (0)	My E90 M3 did this, it sucks and kills the fun. I was hoping they fixed this with this new tranny, but I guess not. Glad I am ordering DCT this time around. __________________ 18? Camaro 2SS 1LE 16' M3 MG Ext. /SO Int. (DCT, Ohlin R/T, 19" wheels) 15' Audi S4 13' Audi TTRS (APR stage 1, MSS springs) 09' C6 Z06 08' M3 Interlagos Blue: 6sp, Tech.
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07-24-2015, 02:38 PM	#22
italyix Captain 141 Rep 979 Posts Drives: '08 E90 M3 Join Date: Dec 2011 Location: Bay Area iTrader: (5)	Not normal at all. My E90 USED to do this, turned out the syncros were shot. Dealer replaced my transmissions and I quickly switched to Redline transmission fluid and what do you know? Second gear grind GONE. If the grind was normal, then this issue would be happening again, it does not. OP, switch to another tranny fluid, IMO the stock fluid is too thick and does not allow for proper slip of syncros. On a side note, I shift from 1 -> 2 near redline and I have a CAE shifter, so there is added stress there as well. Butter smooth every time. __________________ Mods: too many the list wont fit in the sig page. PM me Tesla Referral code: http://ts.la/juliana77782
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